ID

VAR-201409-0511

CVE

CVE-2014-4374

TITLE

Apple iOS and Mac OS X of Foundation Inside NSXMLParser Vulnerable to reading arbitrary files

DESCRIPTION

NSXMLParser in Foundation in Apple iOS before 8 allows attackers to read arbitrary files via XML data containing an external entity declaration in conjunction with an entity reference, related to an XML External Entity (XXE) issue. Apple iOS and TV are prone to multiple security vulnerabilities. These issues affect the following components: 802.1X, Accounts, Accessibility, Accounts Framework, Address Book, App Installation, Assets, Bluetooth, CoreGraphics, Foundation, Home &amp; Lock Screen, iMessage, IOAcceleratorFamily, IOAcceleratorFamily, IOHIDFamily, IOHIDFamily, IOKit, Kernel, Libnotify, Mail, Profiles, Safari, Sandbox Profiles, syslog and WebKit components. Successfully exploiting these issues may allow attackers to crash the affected device, bypass security restrictions, obtain sensitive information, or execute arbitrary code. Other attacks are also possible. This BID is being retired. The following individual records exist to better document the issues: 69913 Apple iOS and TV CVE-2014-4364 Spoofing Vulnerability 69917 Apple iOS CVE-2014-4423 Information Disclosure Vulnerability 69926 Apple iOS Lock Screen CVE-2014-4368 Security Bypass Vulnerability 69930 Apple iOS and TV CVE-2014-4357 Local Information Disclosure Security Vulnerability 69932 Apple iOS CVE-2014-4352 Local Information Disclosure Security Vulnerability 69936 Apple iOS CVE-2014-4386 Local Privilege Escalation Vulnerability 69940 Apple iOS CVE-2014-4384 Local Privilege Escalation Vulnerability 69941 Apple iOS and TV CVE-2014-4383 Security Bypass Vulnerability 69943 Apple iOS CVE-2014-4354 Unspecified Security Vulnerability 69903 Multiple Apple Products CVE-2014-4377 PDF Handling Integer Overflow Vulnerability 69915 Apple TV/Mac OS X/iOS CVE-2014-4378 Out of Bounds Read Memory Corruption Vulnerability 69905 Apple Mac OS X and iOS CVE-2014-4374 XML External Entity Information Disclosure Vulnerability 69921 Apple TV/Mac OS X/iOS CVE-2014-4379 Out of Bounds Read Memory Corruption Vulnerability 69929 Apple TV and iOS CVE-2014-4369 NULL Pointer Dereference Denial of Service Vulnerability 69934 Apple TV and iOS CVE-2014-4373 NULL Pointer Dereference Denial of Service Vulnerability 69938 Apple TV and iOS CVE-2014-4405 NULL Pointer Dereference Remote Code Execution Vulnerability 69942 Apple TV and iOS CVE-2014-4380 Out of Bounds Read Write Remote Code Execution Vulnerability 69947 Apple TV and iOS CVE-2014-4404 Heap Based Buffer Overflow Vulnerability 69949 Apple iOS CVE-2014-4361 Security Bypass Vulnerability 69951 Apple iOS CVE-2014-4353 Race Condition Local Information Disclosure Vulnerability 69912 Apple iOS and TV CVE-2014-4407 Information Disclosure Security Vulnerability 69919 Apple iOS and TV CVE-2014-4371 Unspecified Security Vulnerability 69924 Apple iOS and TV CVE-2014-4421 Unspecified Security Vulnerability 69927 Apple iOS and TV CVE-2014-4420 Unspecified Security Vulnerability 69928 Apple iOS and TV CVE-2014-4419 Unspecified Security Vulnerability 69939 Apple iOS and TV CVE-2014-4408 Out of Bounds Read Local Memory Corruption Vulnerability 69944 Apple iOS and TV CVE-2014-4375 Local Memory Corruption Vulnerability 69946 Apple iOS and TV CVE-2014-4418 Remote Code Execution Vulnerability 69948 Apple TV/Mac OS X/iOS CVE-2014-4388 Remote Code Execution Vulnerability 69950 Apple TV/Mac OS X/iOS CVE-2014-4389 Integer Buffer Overflow Vulnerability 69937 WebKit Private Browsing CVE-2014-4409 Security Bypass Vulnerability 69911 Apple iOS and TV CVE-2014-4422 Security Bypass Vulnerability 69931 Apple TV/Mac OS X/iOS CVE-2014-4381 Arbitrary Code Execution Vulnerability 69914 Apple iOS CVE-2014-4366 Information Disclosure Vulnerability 69945 Apple iOS CVE-2014-4367 Security Vulnerability 69920 Apple iOS CVE-2014-4362 Information Disclosure Vulnerability 69922 Apple iOS CVE-2014-4356 Local Information Disclosure Vulnerability 69923 Apple iOS and TV CVE-2014-4372 Local Security Bypass Vulnerability 69937 WebKit Private Browsing CVE-2014-4409 Security Bypass Vulnerability. Apple iOS is an operating system developed by Apple (Apple) for mobile devices. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 APPLE-SA-2014-09-17-3 OS X Mavericks 10.9.5 and Security Update 2014-004 OS X Mavericks 10.9.5 and Security Update 2014-004 are now available and address the following: apache_mod_php Available for: OS X Mavericks 10.9 to 10.9.4 Impact: Multiple vulnerabilities in PHP 5.4.24 Description: Multiple vulnerabilities existed in PHP 5.4.24, the most serious of which may have led to arbitrary code execution. This issue was addressed through always allocating the Global Descriptor Table at random addresses. This issue was addressed through improved bounds checking CVE-ID CVE-2014-4381 : Ian Beer of Google Project Zero OpenSSL Available for: OS X Lion v10.7.5, OS X Lion Server v10.7.5, OS X Mountain Lion v10.8.5, OS X Mavericks 10.9 to 10.9.4 Impact: Multiple vulnerabilities in OpenSSL 0.9.8y, including one that may lead to arbitrary code execution Description: Multiple vulnerabilities existed in OpenSSL 0.9.8y. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 APPLE-SA-2014-09-17-1 iOS 8 iOS 8 is now available and addresses the following: 802.1X Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: An attacker can obtain WiFi credentials Description: An attacker could have impersonated a WiFi access point, offered to authenticate with LEAP, broken the MS-CHAPv1 hash, and used the derived credentials to authenticate to the intended access point even if that access point supported stronger authentication methods. This issue was addressed by disabling LEAP by default. CVE-ID CVE-2014-4364 : Pieter Robyns, Bram Bonne, Peter Quax, and Wim Lamotte of Universiteit Hasselt Accounts Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A malicious application may be able to identify the Apple ID of the user Description: An issue existed in the access control logic for accounts. A sandboxed application could get information about the currently-active iCloud account, including the name of the account. CVE-ID CVE-2014-4423 : Adam Weaver Certificate Trust Policy Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: Update to the certificate trust policy Description: The certificate trust policy was updated. The complete list of certificates may be viewed at http://support.apple.com/kb/HT5012. Accessibility Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: The device may not lock the screen when using AssistiveTouch Description: A logic issue existed in AssistiveTouch's handling of events, which resulted in the screen not locking. This issue was addressed through improved handling of the lock timer. CVE-ID CVE-2014-4368 : Hendrik Bettermann Accounts Framework Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: An attacker with access to an iOS device may access sensitive user information from logs Description: Sensitive user information was logged. This issue was addressed by logging less information. CVE-ID CVE-2014-4357 : Heli Myllykoski of OP-Pohjola Group Address Book Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A person with physical access to an iOS device may read the address book Description: The address book was encrypted with a key protected only by the hardware UID. This issue was addressed by encrypting the address book with a key protected by the hardware UID and the user's passcode. CVE-ID CVE-2014-4352 : Jonathan Zdziarski App Installation Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A local attacker may be able to escalate privileges and install unverified applications Description: A race condition existed in App Installation. An attacker with the capability of writing to /tmp may have been able to install an unverified app. This issue was addressed by staging files for installation in another directory. CVE-ID CVE-2014-4386 : evad3rs App Installation Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A local attacker may be able to escalate privileges and install unverified applications Description: A path traversal issue existed in App Installation. A local attacker could have retargeted code signature validation to a bundle different from the one being installed and cause installation of an unverified app. This issue was addressed by detecting and preventing path traversal when determining which code signature to verify. CVE-ID CVE-2014-4384 : evad3rs Assets Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: An attacker with a privileged network position may be able to cause an iOS device to think that it is up to date even when it is not Description: A validation issue existed in the handling of update check responses. Spoofed dates from Last-Modified response headers set to future dates were used for If-Modified-Since checks in subsequent update requests. This issue was addressed by validation of the Last-Modified header. CVE-ID CVE-2014-4383 : Raul Siles of DinoSec Bluetooth Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: Bluetooth is unexpectedly enabled by default after upgrading iOS Description: Bluetooth was enabled automatically after upgrading iOS. This was addressed by only turning on Bluetooth for major or minor version updates. CVE-ID CVE-2014-4354 : Maneet Singh, Sean Bluestein CoreGraphics Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: Opening a maliciously crafted PDF file may lead to an unexpected application termination or arbitrary code execution Description: An integer overflow existed in the handling of PDF files. This issue was addressed through improved bounds checking. CVE-ID CVE-2014-4377 : Felipe Andres Manzano of Binamuse VRT working with the iSIGHT Partners GVP Program CoreGraphics Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: Opening a maliciously crafted PDF file may lead to an unexpected application termination or an information disclosure Description: An out of bounds memory read existed in the handling of PDF files. This issue was addressed through improved bounds checking. CVE-ID CVE-2014-4378 : Felipe Andres Manzano of Binamuse VRT working with the iSIGHT Partners GVP Program Data Detectors Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: Tapping on a FaceTime link in Mail would trigger a FaceTime audio call without prompting Description: Mail did not consult the user before launching facetime-audio:// URLs. This issue was addressed with the addition of a confirmation prompt. CVE-ID CVE-2013-6835 : Guillaume Ross Foundation Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: An application using NSXMLParser may be misused to disclose information Description: An XML External Entity issue existed in NSXMLParser's handling of XML. This issue was addressed by not loading external entities across origins. CVE-ID CVE-2014-4374 : George Gal of VSR (http://www.vsecurity.com/) Home & Lock Screen Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A background app can determine which app is frontmost Description: The private API for determining the frontmost app did not have sufficient access control. This issue was addressed through additional access control. CVE-ID CVE-2014-4361 : Andreas Kurtz of NESO Security Labs and Markus TroBbach of Heilbronn University iMessage Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: Attachments may persist after the parent iMessage or MMS is deleted Description: A race condition existed in how attachments were deleted. This issue was addressed by conducting additional checks on whether an attachment has been deleted. CVE-ID CVE-2014-4353 : Silviu Schiau IOAcceleratorFamily Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: An application may cause an unexpected system termination Description: A null pointer dereference existed in the handling of IOAcceleratorFamily API arguments. This issue was addressed through improved validation of IOAcceleratorFamily API arguments. CVE-ID CVE-2014-4369 : Catherine aka winocm IOAcceleratorFamily Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: The device may unexpectedly restart Description: A NULL pointer dereference was present in the IntelAccelerator driver. The issue was addressed by improved error handling. CVE-ID CVE-2014-4373 : cunzhang from Adlab of Venustech IOHIDFamily Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A malicious application may be able to read kernel pointers, which can be used to bypass kernel address space layout randomization Description: An out-of-bounds read issue existed in the handling of an IOHIDFamily function. This issue was addressed through improved bounds checking. CVE-ID CVE-2014-4379 : Ian Beer of Google Project Zero IOHIDFamily Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A malicious application may be able to execute arbitrary code with system privileges Description: A heap buffer overflow existed in IOHIDFamily's handling of key-mapping properties. This issue was addressed through improved bounds checking. CVE-ID CVE-2014-4404 : Ian Beer of Google Project Zero IOHIDFamily Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A malicious application may be able to execute arbitrary code with system privileges Description: A null pointer dereference existed in IOHIDFamily's handling of key-mapping properties. This issue was addressed through improved validation of IOHIDFamily key-mapping properties. CVE-ID CVE-2014-4405 : Ian Beer of Google Project Zero IOHIDFamily Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A malicious application may be able to execute arbitrary code with kernel privileges Description: An out-of-bounds write issue existed in the IOHIDFamily kernel extension. This issue was addressed through improved bounds checking. CVE-ID CVE-2014-4380 : cunzhang from Adlab of Venustech IOKit Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A malicious application may be able to read uninitialized data from kernel memory Description: An uninitialized memory access issue existed in the handling of IOKit functions. This issue was addressed through improved memory initialization CVE-ID CVE-2014-4407 : @PanguTeam IOKit Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A malicious application may be able to execute arbitrary code with system privileges Description: A validation issue existed in the handling of certain metadata fields of IODataQueue objects. This issue was addressed through improved validation of metadata. CVE-ID CVE-2014-4418 : Ian Beer of Google Project Zero IOKit Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A malicious application may be able to execute arbitrary code with system privileges Description: A validation issue existed in the handling of certain metadata fields of IODataQueue objects. This issue was addressed through improved validation of metadata. CVE-ID CVE-2014-4388 : @PanguTeam IOKit Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A malicious application may be able to execute arbitrary code with system privileges Description: An integer overflow existed in the handling of IOKit functions. This issue was addressed through improved validation of IOKit API arguments. CVE-ID CVE-2014-4389 : Ian Beer of Google Project Zero Kernel Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A local user may be able to determine kernel memory layout Description: Multiple uninitialized memory issues existed in the network statistics interface, which led to the disclosure of kernel memory content. This issue was addressed through additional memory initialization. CVE-ID CVE-2014-4371 : Fermin J. Serna of the Google Security Team CVE-2014-4419 : Fermin J. Serna of the Google Security Team CVE-2014-4420 : Fermin J. Serna of the Google Security Team CVE-2014-4421 : Fermin J. Serna of the Google Security Team Kernel Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A person with a privileged network position may cause a denial of service Description: A race condition issue existed in the handling of IPv6 packets. This issue was addressed through improved lock state checking. CVE-ID CVE-2011-2391 : Marc Heuse Kernel Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A local user may be able to cause an unexpected system termination or arbitrary code execution in the kernel Description: A double free issue existed in the handling of Mach ports. This issue was addressed through improved validation of Mach ports. CVE-ID CVE-2014-4375 : an anonymous researcher Kernel Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A local user may be able to cause an unexpected system termination or arbitrary code execution in the kernel Description: An out-of-bounds read issue existed in rt_setgate. This may lead to memory disclosure or memory corruption. This issue was addressed through improved bounds checking. CVE-ID CVE-2014-4408 Kernel Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: Some kernel hardening measures may be bypassed Description: The random number generator used for kernel hardening measures early in the boot process was not cryptographically secure. Some of its output was inferable from user space, allowing bypass of the hardening measures. This issue was addressed by using a cryptographically secure algorithm. CVE-ID CVE-2014-4422 : Tarjei Mandt of Azimuth Security Libnotify Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A malicious application may be able to execute arbitrary code with root privileges Description: An out-of-bounds write issue existed in Libnotify. This issue was addressed through improved bounds checking. CVE-ID CVE-2014-4381 : Ian Beer of Google Project Zero Lockdown Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A device can be manipulated into incorrectly presenting the home screen when the device is activation locked Description: An issue existed with unlocking behavior that caused a device to proceed to the home screen even if it should still be in an activation locked state. This was addressed by changing the information a device verifies during an unlock request. CVE-ID CVE-2014-1360 Mail Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: Login credentials can be sent in plaintext even if the server has advertised the LOGINDISABLED IMAP capability Description: Mail sent the LOGIN command to servers even if they had advertised the LOGINDISABLED IMAP capability. This issue is mostly a concern when connecting to servers that are configured to accept non- encrypted connections and that advertise LOGINDISABLED. This issue was addressed by respecting the LOGINDISABLED IMAP capability. CVE-ID CVE-2014-4366 : Mark Crispin Mail Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A person with physical access to an iOS device may potentially read email attachments Description: A logic issue existed in Mail's use of Data Protection on email attachments. This issue was addressed by properly setting the Data Protection class for email attachments. CVE-ID CVE-2014-1348 : Andreas Kurtz of NESO Security Labs Profiles Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: Voice Dial is unexpectedly enabled after upgrading iOS Description: Voice Dial was enabled automatically after upgrading iOS. This issue was addressed through improved state management. CVE-ID CVE-2014-4367 : Sven Heinemann Safari Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: User credentials may be disclosed to an unintended site via autofill Description: Safari may have autofilled user names and passwords into a subframe from a different domain than the main frame. This issue was addressed through improved origin tracking. CVE-ID CVE-2013-5227 : Niklas Malmgren of Klarna AB Safari Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: An attacker with a privileged network position may intercept user credentials Description: Saved passwords were autofilled on http sites, on https sites with broken trust, and in iframes. This issue was addressed by restricting password autofill to the main frame of https sites with valid certificate chains. CVE-ID CVE-2014-4363 : David Silver, Suman Jana, and Dan Boneh of Stanford University working with Eric Chen and Collin Jackson of Carnegie Mellon University Sandbox Profiles Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: Apple ID information is accessible by third-party apps Description: An information disclosure issue existed in the third- party app sandbox. This issue was addressed by improving the third- party sandbox profile. CVE-ID CVE-2014-4362 : Andreas Kurtz of NESO Security Labs and Markus TroBbach of Heilbronn University Settings Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: Text message previews may appear at the lock screen even when this feature is disabled Description: An issue existed in the previewing of text message notifications at the lock screen. As a result, the contents of received messages would be shown at the lock screen even when previews were disabled in Settings. The issue was addressed through improved observance of this setting. CVE-ID CVE-2014-4356 : Mattia Schirinzi from San Pietro Vernotico (BR), Italy syslog Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A local user may be able to change permissions on arbitrary files Description: syslogd followed symbolic links while changing permissions on files. This issue was addressed through improved handling of symbolic links. CVE-ID CVE-2014-4372 : Tielei Wang and YeongJin Jang of Georgia Tech Information Security Center (GTISC) Weather Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: Location information was sent unencrypted Description: An information disclosure issue existed in an API used to determine local weather. This issue was addressed by changing APIs. WebKit Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A malicious website may be able to track users even when private browsing is enabled Description: A web application could store HTML 5 application cache data during normal browsing and then read the data during private browsing. This was addressed by disabling access to the application cache when in private browsing mode. CVE-ID CVE-2014-4409 : Yosuke Hasegawa (NetAgent Co., Led.) WebKit Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution Description: Multiple memory corruption issues existed in WebKit. These issues were addressed through improved memory handling. CVE-ID CVE-2013-6663 : Atte Kettunen of OUSPG CVE-2014-1384 : Apple CVE-2014-1385 : Apple CVE-2014-1387 : Google Chrome Security Team CVE-2014-1388 : Apple CVE-2014-1389 : Apple CVE-2014-4410 : Eric Seidel of Google CVE-2014-4411 : Google Chrome Security Team CVE-2014-4412 : Apple CVE-2014-4413 : Apple CVE-2014-4414 : Apple CVE-2014-4415 : Apple WiFi Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later Impact: A device may be passively tracked by its WiFi MAC address Description: An information disclosure existed because a stable MAC address was being used to scan for WiFi networks. This issue was addressed by randomizing the MAC address for passive WiFi scans. Note: iOS 8 contains changes to some diagnostic capabilities. For details, please consult http://support.apple.com/kb/HT6331 iOS 8 now permits devices to untrust all previously trusted computers. Instructions can be found at http://support.apple.com/kb/HT5868 Installation note: This update is available through iTunes and Software Update on your iOS device, and will not appear in your computer's Software Update application, or in the Apple Downloads site. Make sure you have an Internet connection and have installed the latest version of iTunes from www.apple.com/itunes/ iTunes and Software Update on the device will automatically check Apple's update server on its weekly schedule. When an update is detected, it is downloaded and the option to be installed is presented to the user when the iOS device is docked. We recommend applying the update immediately if possible. Selecting Don't Install will present the option the next time you connect your iOS device. The automatic update process may take up to a week depending on the day that iTunes or the device checks for updates. You may manually obtain the update via the Check for Updates button within iTunes, or the Software Update on your device. To check that the iPhone, iPod touch, or iPad has been updated: * Navigate to Settings * Select General * Select About. The version after applying this update will be "8". Information will also be posted to the Apple Security Updates web site: http://support.apple.com/kb/HT1222 This message is signed with Apple's Product Security PGP key, and details are available at: https://www.apple.com/support/security/pgp/ -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.22 (Darwin) Comment: GPGTools - http://gpgtools.org iQIcBAEBAgAGBQJUGNl6AAoJEBcWfLTuOo7tD0oP/2QjJQxEaVKH5GhKX7HTLB9e W2oU7kHqds6p9HQg3iw9SXs/c03EH2++Tf5+Kul8V94QZB2jD4T28MUctAjrvSX7 rHRTPFJn8dm6Dr/zReon3q6ph8PlnDGySJLON/RwrSwHpWcd8wA4uCC6gTPur3T9 tNfPrkT+b4iO4QsSLQaK6bJqTFmWruqEFwdXmtOY8qYOsEANMr9HPdm9WwEcdQaZ tZZpa1FU4jIdfHZw18a3rzQ1LW4OO9fWbihKRgY8xq+Q8+Cs/EnY9hCIN0jl0OHm TMvKojeO4CCBAKpwUQOVERkI4Oc7Ux6GefT84ttYu095KzmZVjq9yWmi0FcBAVMV s32YL/alCNm86uNvxvkAvWJ3ZeZymuoTZHoNX5YNGIhuunRZONK94ay1RtYMdWPl iesWma7tn9g/xMWRaDKfRy2vtUuetBVxiaAr3AqvMp+mx0lmmLOO8x1SxeKe+QUy HO1O1DVAWPv2JIEf7mstDBHfQKYBRcgM3P4DJAgkrgH42ZNWb06ZyQhpAvFLVncD g2/Q0cwUlPOvdNKxoUD3IVVwPZeIefw3vqrSHXSQPpIMkJJFrBbIB8v6nnkheebg h5bPWfIxP0wuBjWz8SjOlPaSjxNxpmHK3H0tLU1q6TneBlmte405ytT4zSI7bvOY ZZCDpw0BRMEXUyXqTns7 =hlmW -----END PGP SIGNATURE----- . Gal <ggal (at) vsecurity.com> Vendor Status: Fix Available CVE Candidate: CVE-2014-4374 Reference: http://www.vsecurity.com/resources/advisory/20140917-1/ http://support.apple.com/kb/HT1222 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Product Description ~-----------------~ - From [1]: "Xcode includes software development kits (SDKs) that enable you to create applications that run on specific versions of iOS or OS X?including versions different from the one you are developing on. This technology lets you build a single binary that takes advantage of new features when running on a system that supports them, and gracefully degrades when running on an older system. Some Apple frameworks automatically modify their behavior based on the SDK an application is built against for improved compatibility." Vulnerability Overview ~--------------------~ In May 2014, VSR identified a vulnerability in versions 7.0 and 7.1 of the iOS SDK whereby the NSXMLParser class, resolves XML External Entities by default despite documentation which indicates otherwise. This vulnerability, commonly known as XXE (XML eXternal Entities) attacks could allow for an attacker's ability to use the XML parser to carry out attacks ranging from network port scanning, information disclosure, denial of service, and potentially to carry out remote file retrieval. Further review also revealed that the Foundation Framework used in OS X 10.9.x is also vulnerable. The severity of this vulnerability varies. For example, in situations where the application does not reflect user influenced XML, retrieval of files may be limited, however using external HTTP entities could be used to conduct port scans. In other scenarios if core iOS applications transmit XML over plaintext protocols, these protocols could potentially be intercepted to leak contents of any file on the mobile device. For App Store applications files which could be accessed may be limited to those under the individual chrooted application directories, or in the case of jailbroken devices, any file on the filesystem. However, inspection of multiple applications running on iOS 7.0 and 7.1 now appear to resolve external entities by default, and even when attempting to disable entity resolution explicitly as shown below: [nsXmlParser setShouldResolveExternalEntities:NO]; The following source code demonstrates the flaw: - - (void) doParse:(NSData *)data { // create and init NSXMLParser object NSXMLParser *nsXmlParser = [[NSXMLParser alloc] initWithData:data]; // Why does the following not even work!? [nsXmlParser setShouldResolveExternalEntities:NO]; // create and init our delegate VSRParser *parser = [[VSRParser alloc] initXMLParser]; // set delegate [nsXmlParser setDelegate:parser]; // parsing... BOOL success = [nsXmlParser parse]; // test the result if (success) { NSLog(@"No errors"); NSMutableArray *stuff = [parser tests]; } else { NSLog(@"Error parsing document!"); } [parser release]; [nsXmlParser release]; } When using a vulnerable input XML file as shown below, the XML parser attempts to perform network name resolution and access the resource defined by &http; <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE roottag [ <!ENTITY http SYSTEM "http://iossdk-xxe.apt.vsecurity.org/"> <!ENTITY file SYSTEM "file:///etc/hosts"> ]> <test> <vsr> <tag1>&file;</tag1> <tag2>&http;</tag2> </vsr> </test> The following DNS and web server log entries demonstrate attempts to resolve &http; 2014-05-19_13:26:28.31088 ... iossdk-xxe.apt.vsecurity.org XX.XX.XX.XX - - [19/May/2014:09:26:28 -0400] "GET /xxe HTTP/1.0" 404 446 "-" "-" In more serious exploitation scenarios, plaintext XML communications between a server and iOS mobile application, or OS X client application could be intercepted and modified in transit to reference a file present on the client device. If the device reflects this value in subsequent communications or errors the contents of files stored on the device could be leaked to an attacker Versions Affected ~---------------~ VSR's analysis revealed that the IOS 7.0, 7.1 SDKs are vulnerable, while earlier versions of IOS and the IOS SDK do not appear to be affected. This vulnerability affects the Mac OSX Foundation, however VSR has not verified the earliest version of the Foundation framework for OSX which is affected. Vendor Response ~-------------~ The following timeline details Apple's response to the reported issue: 2014-05-19 Apple was provided a draft advisory. Common Vulnerabilities and Exposures (CVE) Information ~----------------------------------------------------~ The Common Vulnerabilities and Exposures (CVE) project has assigned the number CVE-2014-4374 to this issue. This is a candidates for inclusion in the CVE list (http://cve.mitre.org), which standardizes names for security problems. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= References: 1. https://developer.apple.com/library/ios/documentation/DeveloperTools/Conceptual/cross_development/Introduction/Introduction.html#//apple_ref/doc/uid/10000163-BCICHGIE 2. https://developer.apple.com/library/ios/documentation/Cocoa/Reference/Foundation/Classes/NSXMLParser_Class/Reference/Reference.html 3. http://support.apple.com/kb/HT1222 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= This advisory is distributed for educational purposes only with the sincere hope that it will help promote public safety. This advisory comes with absolutely NO WARRANTY; not even the implied warranty of merchantability or fitness for a particular purpose. Neither Virtual Security Research, LLC nor the author accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information. See the VSR disclosure policy for more information on our responsible disclosure practices: http://www.vsecurity.com/company/disclosure =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Copyright 2014 Virtual Security Research, LLC. All rights reserved

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

other

CONFIGURATIONS

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Pieter Robyns, Bram Bonne, Peter Quax, and Wim Lamotte, Adam Weaver, Hendrik Bettermann, Heli Myllykoski, Jonathan Zdziarski, evad3rs, Raul Siles of DinoSec, Maneet Singh, Sean Bluestein, Felipe Andres Manzano of Binamuse VRT working with the iSIGHT Partne

SOURCES

LAST UPDATE DATE

2024-11-23T20:30:22.586000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE