ID

VAR-200411-0172

CVE

CVE-2004-0079

TITLE

OpenSSL contains null-pointer assignment in do_change_cipher_spec() function

DESCRIPTION

The do_change_cipher_spec function in OpenSSL 0.9.6c to 0.9.6k, and 0.9.7a to 0.9.7c, allows remote attackers to cause a denial of service (crash) via a crafted SSL/TLS handshake that triggers a null dereference. OpenSSL Is SSL/TLS Due to incomplete implementation of do_change_cipher_spec() In the function NULL A vulnerability exists where pointers are not handled properly.OpenSSL An application that uses the service disrupts service operation (DoS) It may be in a state. OpenSSL is an open source SSL implementation used to implement high-strength encryption of network communications. It is now widely used in various network applications.  Using the Codenomicon TLS test tool, OpenSSL found a NULL pointer allocation in the do_change_cipher_spec () function. Applications that rely on this library will generate a denial of service. For the first issue, a NULL-pointer assignment can be triggered by attackers during SSL/TLS handshake exchanges. The CVE candidate name for this vulnerability is CAN-2004-0079. Versions 0.9.6c to 0.9.6k (inclusive) and from 0.9.7a to 0.9.7c (inclusive) are vulnerable. The second issue is also exploited during the SSL/TLS handshake, but only when Kerberos ciphersuites are in use. The vendor has reported that this vulnerability may not be a threat to many, because it occurs only when Kerberos ciphersuites are in use, an uncommon configuration. The CVE candidate name for this vulnerability is CAN-2004-0112. Versions 0.9.7a, 0.9.7b, and 0.9.7c are affected. This entry will be retired when individual BID records are created for each issue. *Note: A third denial-of-service vulnerability included in the announcement was discovered affecting 0.9.6 and fixed in 0.9.6d. The CVE candidate name for this vulnerability is CAN-2004-0081. Multiple security vulnerabilities are reported to affect Apple Mac OS X; updates are available. Apache is prone to five vulnerabilities ranging from buffer overflows to access validation vulnerabilities. The CVE Mitre candidate IDs CAN-2005-1344, CAN-2004-0942, CAN-2004-0885, CAN-2004-1083, and CAN-2004-1084 are assigned to these issues. Appkit is prone to three vulnerabilities. Two of these could result in arbitrary code execution, the third could permit the creation of local accounts. The CVE Mitre candidate IDs CAN-2005-2501, CAN-2005-2502, and CAN-2005-2503 are assigned to these issues. Bluetooth is prone to a vulnerability regarding authentication bypass. The CVE Mitre candidate ID CAN-2005-2504 is assigned to this issue. CoreFoundation is prone to two vulnerabilities, one resulting in a buffer overflow, the other a denial-of-service vulnerability. The CVE Mitre candidate IDs CAN-2005-2505 and CAN-2005-2506 are assigned to these issues. CUPS is prone to two vulnerabilities resulting in a denial of service until the service can be restarted. The CVE Mitre candidate IDs CAN-2005-2525 and CAN-2005-2526 are assigned to these issues. Directory Services is prone to three vulnerabilities. These issues vary from buffer overflow, unauthorized account creation and deletion, and privilege escalation. The CVE Mitre candidate IDs CAN-2005-2507, CAN-2005-2508 and CAN-2005-2519 are assigned to these issues. HItoolbox is prone to a vulnerability that could result in information disclosure. The CVE Mitre candidate ID CAN-2005-2513 is assigned to this issue. Kerberos is prone to five vulnerabilities that may result in a buffer overflow, execution of arbitrary code, and root compromise. The CVE Mitre candidate IDs CAN-2004-1189, CAN-2005-1174, CAN-2005-1175, CAN-2005-1689, and CAN-2005-2511 are assigned to these issues. loginwindow is prone to a vulnerability that could permit a user to gain access to other logged-in accounts. The CVE Mitre candidate ID CAN-2005-2509 is assigned to this issue. Mail is prone to a vulnerability regarding the loss of privacy when remote images are loaded into HTML email. The CVE Mitre candidate ID CAN-2005-2512 is assigned to this issue. MySQL is prone to three vulnerabilities that include arbitrary code execution by remote authenticated users. The CVE Mitre candidate IDs CAN-2005-0709, CAN-2005-0710, and CAN-2005-0711 are assigned to these issues. The CVE Mitre candidate IDs CAN-2004-0079 and CAN-2004-0112 are assigned to these issues. ping is prone to a vulnerability that could allow local privilege escalation and arbitrary code execution. The CVE Mitre candidate ID CAN-2005-2514 is assigned to this issue. QuartzComposerScreenSaver is prone to a vulnerability that could allow users to open pages while the RSS Visualizer screen is locked. The CVE Mitre candidate ID CAN-2005-2515 is assigned to this issue. Safari is prone to two vulnerabilities that could result in arbitrary command execution or have information submitted to an incorrect site. The CVE Mitre candidate IDs CAN-2005-2516 and CAN-2005-2517 are assigned to these issues. SecurityInterface is prone to a vulnerability that could expose recently used passwords. The CVE Mitre candidate ID CAN-2005-2520 is assigned to this issue. servermgrd is prone to a buffer-overflow vulnerability that could ultimately lead to the execution of arbitrary code. The CVE Mitre candidate ID CAN-2005-2518 is assigned to this issue. servermgr_ipfilter is prone to a vulnerability regarding firewall settings not always being written to the Active Rules. The CVE Mitre candidate ID CAN-2005-2510 is assigned to this issue. SquirrelMail is prone to two vulnerabilities including a cross-site scripting issue. The CVE Mitre candidate IDs CAN-2005-1769 and CAN-2005-2095 are assigned to these issues. traceroute is prone to a vulnerability that could result in arbitrary code execution and privilege escalation. The CVE Mitre candidate ID CAN-2005-2521 is assigned to this issue. WebKit is affected by a vulnerability that could result in code execution regarding a malformed PDF file. The CVE Mitre candidate ID CAN-2005-2522 is assigned to this issue. Weblog Server is prone to multiple cross-site scripting vulnerabilities. The CVE Mitre candidate ID CAN-2005-2523 is assigned to this issue. X11 is prone to a vulnerability that could result in arbitrary code execution. The CVE Mitre candidate ID CAN-2005-0605 is assigned to this issue. zlib is prone to two denial-of-service vulnerabilities that may ultimately lead to arbitrary code execution. The CVE Mitre candidate IDs CAN-2005-2096 and CAN-2005-1849 are assigned to these issues. These vulnerabilities will be separated into individual BIDs upon further analysis of the issues. Oracle Database Server, Oracle Application Server, Oracle Collaboration Suite, Oracle E-Business and Applications, Oracle Enterprise Manager Grid Control, and Oracle PeopleSoft Applications are reported prone to multiple vulnerabilities. Oracle has released a Critical Patch Update to address these issues in various supported applications and platforms. The issues identified by the vendor affect all security properties of the Oracle products and present local and remote threats. While various levels of authorization are required to leverage some issues, others do not require any authorization. This BID will be divided and updated into separate BIDs when more information is available. It supports a variety of encryption algorithms, including symmetric ciphers, hash algorithms, security hashing algorithm, etc. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Cisco Security Advisory: Cisco OpenSSL Implementation Vulnerability Revision 1.0 For Public Release 2004 March 17 at 1300 UTC (GMT) ---------------------------------------------------------------------- Contents Summary Affected Products Details Impact Software Versions and Fixes Obtaining Fixed Software Workarounds Exploitation and Public Announcements Status of This Notice: INTERIM Distribution Revision History Cisco Security Procedures ---------------------------------------------------------------------- Summary A new vulnerability in the OpenSSL implementation for SSL has been announced on March 17, 2004. An affected network device running an SSL server based on an affected OpenSSL implementation may be vulnerable to a Denial of Service (DoS) attack. There are workarounds available to mitigate the effects of this vulnerability on Cisco products in the workaround section of this advisory. Cisco is providing fixed software, and recommends that customers upgrade to it when it is available. This advisory will be posted at http://www.cisco.com/warp/public/707/cisco-sa-20040317-openssl.shtml. * Cisco IOS 12.1(11)E and later in the 12.1E release train. Only crypto images (56i and k2) are vulnerable for the Cisco 7100 and 7200 Series Routers. * Cisco IOS 12.2SY release train. Only crypto images (k8, k9 and k91) are vulnerable for the Cisco Catalyst 6500 Series and Cisco 7600 Series Routers. * Cisco PIX Firewall * Cisco Firewall Services Module (FWSM) for the Cisco Catalyst 6500 Series and Cisco 7600 Series routers * Cisco MDS 9000 Series Multilayer Switch * Cisco Content Service Switch (CSS) 11000 series * Cisco Global Site Selector (GSS) 4480 * CiscoWorks Common Services (CWCS) version 2.2 and CiscoWorks Common Management Foundation (CMF) version 2.1 * Cisco Access Registrar (CAR) The following products have their SSL implementation based on the OpenSSL code and are not affected by this vulnerability. * Cisco Secure Intrusion Detection System (NetRanger) appliance. This includes the IDS-42xx appliances, NM-CIDS and WS-SVS-IDSM2. * Cisco SN 5428 and SN 5428-2 Storage Router * Cisco CNS Configuration Engine * Cisco Network Analysis Modules (NAM) for the Cisco Catalyst 6000 and 6500 Series switches and Cisco 7600 Series routers * Cisco SIP Proxy Server (SPS) * CiscoWorks 1105 Hosting Solution Engine (HSE) * CiscoWorks 1105 Wireless LAN Solution Engine (WLSE) * Cisco Ethernet Subscriber Solution Engine (ESSE) The following products, which implement SSL, are not affected by this vulnerability. * Cisco VPN 3000 Series Concentrators CatOS does not implement SSL and is not vulnerable. No other Cisco products are currently known to be affected by this vulnerability. This vulnerability is still being actively investigated across Cisco products and status of some products has still not been determined. Details Secure Sockets Layer (SSL), is a protocol used to encrypt the data transferred over an TCP session. SSL in Cisco products is mainly used by the HyperText Transfer Protocol Secure (HTTPS) web service for which the default TCP port is 443. The affected products, listed above, are only vulnerable if they have the HTTPS service enabled and the access to the service is not limited to trusted hosts or network management workstations. To check if the HTTPS service is enabled one can do the following: 1. Check the configuration on the device to verify the status of the HTTPS service. 2. Try to connect to the device using a standard web browser that supports SSL using a URL similar to https://ip_address_of_device/. 3. Try and connect to the default HTTPS port, TCP 443, using Telnet. telnet ip_address_of_device 443. If the session connects the service is enabled and accessible. This crash on many Cisco products would cause the device to reload. A third vulnerability described in the NISCC advisory is a bug in older versions of OpenSSL, versions before 0.9.6d, that can also lead to a Denial of Service attack. None of the Cisco OpenSSL implementations are known to be affected by this older OpenSSL issue. * Cisco IOS - All 12.1(11)E and later IOS software crypto (56i and k2) image releases in the 12.1E release train for the Cisco 7100 and 7200 Series Routers are affected by this vulnerability. All IOS software crypto (k8, k9, and k91) image releases in the 12.2SY release train for the Cisco Catalyst 6500 Series and Cisco 7600 Series Routers are affected by this vulnerability. The SSH implementation in IOS is not dependent on any OpenSSL code. SSH implementations in IOS do not handle certificates, yet, and therefore do not use any SSL code for SSH. OpenSSL in 12.1E and 12.2SY release trains is only used for providing the HTTPS and VPN Device Manager (VDM) services. This vulnerability is documented in the Cisco Bug Toolkit (registered customers only) as Bug ID CSCee00041. The HTTPS web service, that uses the OpenSSL code, on the device is disabled by default. The no ip http secure-server command may be used to disable the HTTPS web service on the device, if required. The SSH and IPSec services in IOS are not vulnerable to this vulnerability. * Cisco PIX Firewall - PIX 6.x releases are affected by this vulnerability. PIX 5.x releases do not contain any SSL code and are not vulnerable. This vulnerability is documented in the Cisco Bug Toolkit (registered customers only) as Bug ID CSCed90672. * Cisco Firewall Services Module (FWSM) for the Cisco Catalyst 6500 Series and Cisco 7600 Series routers - This vulnerability is documented in the Cisco Bug Toolkit (registered customers only) as Bug ID CSCee02055. * Cisco MDS 9000 Series Multilayer Switches - This vulnerability is documented in the Cisco Bug Toolkit (registered customers only) as Bug ID CSCed96246. * Cisco Content Service Switch (CSS) 11000 series - WebNS version 6.x and 7.x are affected by this vulnerability. This vulnerability is documented in the Cisco Bug Toolkit (registered customers only) as Bug ID CSCee01234 for SCM and is documented in the Cisco Bug Toolkit (registered customers only) as Bug ID CSCee01240 for the SSL module. * Cisco Global Site Selector (GSS) 4480 - This vulnerability is documented in the Cisco Bug Toolkit (registered customers only) as Bug ID CSCee01057. * CiscoWorks Common Services (CWCS) version 2.2 and CiscoWorks Common Management Foundation (CMF) version 2.1 - This vulnerability is documented in the Cisco Bug Toolkit (registered customers only) as Bug ID CSCsa13748. * Cisco Access Registrar (CAR) - This vulnerability is documented in the Cisco Bug Toolkit (registered customers only) as Bug ID CSCee01956. The Internetworking Terms and Cisco Systems Acronyms online guides can be found at http://www.cisco.com/univercd/cc/td/doc/cisintwk/. Impact An affected network device running an SSL server based on the OpenSSL implementation may be vulnerable to a Denial of Service (DoS) attack. Software Versions and Fixes * Cisco IOS - +----------------------------------------+ |Release| Fixed Releases |Availability | | Train | | | |-------+------------------+-------------| |12.2SY |12.2(14)SY4 |March 25 | |-------+------------------+-------------| | |12.1(13)E14 |April 8 | |12.1E |12.1.(19)E7 |April 8 | | |12.1(20)E3 |April 26 | +----------------------------------------+ * Cisco PIX Firewall - The vulnerability is fixed in software releases 6.0(4)102, 6.1(5)102, 6.2(3)107, and 6.3(3)124. These engineering builds may be obtained by contacting the Cisco Technical Assistance Center (TAC). TAC Contact information is given in the Obtaining Fixed Software section below. * Cisco Firewall Services Module (FWSM) for the Cisco Catalyst 6500 Series and Cisco 7600 Series routers - The vulnerability is fixed in software release 1.1.3(14) which will be available by Monday, 22 of March, 2004. This engineering builds may be obtained by contacting the Cisco Technical Assistance Center (TAC). TAC Contact information is given in the Obtaining Fixed Software section below. * Cisco MDS 9000 Series Multilayer Switches - No fixed software release or software availability date has been determined yet. * Cisco Content Service Switch (CSS) 11000 series -No fixed software release or software availability date has been determined yet. * Cisco Global Site Selector (GSS) 4480 - No fixed software release or software availability date has been determined yet. * CiscoWorks Common Services (CWCS) version 2.2 and CiscoWorks Common Management Foundation (CMF) version 2.1 - No fixed software release or software availability date has been determined yet. * Cisco Access Registrar (CAR) - The vulnerability is fixed in software release 3.5.0.12 which will be available by Friday, 26 of March, 2004. Obtaining Fixed Software Cisco is offering free software upgrades to address this vulnerability for all affected customers. Customers may only install and expect support for the feature sets they have purchased. By installing, downloading, accessing or otherwise using such software upgrades, Customers agree to be bound by the terms of Cisco's software license terms found at http://www.cisco.com/public/sw-license-agreement.html, or as otherwise set forth at the Cisco Connection Online Software Center at http://www.cisco.com/public/sw-center/sw-usingswc.shtml. Customers with contracts should obtain upgraded software through their regular update channels. For most customers, this means that upgrades should be obtained through the Software Center on Cisco's worldwide website at http://www.cisco.com/tacpage/sw-center. To access the software download URL, you must be a registered user and you must be logged in. Customers whose Cisco products are provided or maintained through a prior or existing agreement with third-party support organizations such as Cisco Partners, authorized resellers, or service providers, should contact that support organization for assistance with obtaining the software upgrade(s). Customers who purchase direct from Cisco but who do not hold a Cisco service contract and customers who purchase through third-party vendors but are unsuccessful at obtaining fixed software through their point of sale should get their upgrades by contacting the Cisco Technical Assistance Center (TAC) using the contact information listed below. In these cases, customers are entitled to obtain a free upgrade to a later version of the same release or as indicated by the applicable corrected software version in the Software Versions and Fixes section (noted above). Cisco TAC contacts are as follows: * +1 800 553 2447 (toll free from within North America) * +1 408 526 7209 (toll call from anywhere in the world) * e-mail: tac@cisco.com See http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml for additional TAC contact information, including special localized telephone numbers and instructions and e-mail addresses for use in various languages. Please have your product serial number available and give the URL of this notice as evidence of your entitlement to a upgrade. Upgrades for non-contract customers must be requested through the TAC. Please do not contact either "psirt@cisco.com" or "security-alert@cisco.com" for software upgrades. Workarounds The Cisco PSIRT recommends that affected users upgrade to a fixed software version of code as soon as it is available. * Restrict access to the HTTPS server on the network device. Allow access to the network device only from trusted workstations by using access lists / MAC filters that are available on the affected platforms. * Disable the SSL server / service on the network device. This workaround must be weighed against the need for secure communications with the vulnerable device. Exploitation and Public Announcements The Cisco PSIRT is not aware of any malicious use of the vulnerability described in this advisory. This vulnerability was reported to Cisco PSIRT by NISCC. Status of This Notice: INTERIM This is an interim advisory. Although Cisco cannot guarantee the accuracy of all statements in this advisory, all of the facts have been checked to the best of our ability. Cisco does not anticipate issuing updated versions of this advisory unless there is some material change in the facts. Should there be a significant change in the facts, Cisco may update this advisory. A stand-alone copy or paraphrase of the text of this security advisory that omits the distribution URL in the following section is an uncontrolled copy, and may lack important information or contain factual errors. Distribution This advisory will be posted on Cisco's worldwide website at http://www.cisco.com/warp/public/707/cisco-sa-20040317-openssl.shtml . In addition to worldwide web posting, a text version of this notice is clear-signed with the Cisco PSIRT PGP key having the fingerprint 8C82 5207 0CA9 ED40 1DD2 EE2A 7B31 A8CF 32B6 B590 and is posted to the following e-mail and Usenet news recipients. * cust-security-announce@cisco.com * first-teams@first.org (includes CERT/CC) * bugtraq@securityfocus.com * vulnwatch@vulnwatch.org * cisco@spot.colorado.edu * cisco-nsp@puck.nether.net * full-disclosure@lists.netsys.com * comp.dcom.sys.cisco@newsgate.cisco.com Future updates of this advisory, if any, will be placed on Cisco's worldwide website, but may or may not be actively announced on mailing lists or newsgroups. Users concerned about this problem are encouraged to check the above URL for any updates. Revision History +------------------------------------------+ |Revision 1.0|2004-March-17|Initial | | | |release. | +------------------------------------------+ Cisco Security Procedures Complete information on reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco, is available on Cisco's worldwide website at http://www.cisco.com/warp/public/707/sec_incident_response.shtml. This includes instructions for press inquiries regarding Cisco security notices. All Cisco security advisories are available at http://www.cisco.com/go/psirt. This advisory is copyright 2004 by Cisco Systems, Inc. This advisory may be redistributed freely after the release date given at the top of the text, provided that redistributed copies are complete and unmodified, including all date and version information. ---------------------------------------------------------------------- -----BEGIN PGP SIGNATURE----- Comment: PGP Signed by Sharad Ahlawat, Cisco Systems PSIRT iD8DBQFAWFvZezGozzK2tZARAqIwAKDXDMLAY6eDYyU8y1MhKZUto2SRxwCg+oid 7AhsNlLsNVSLwTRKTHSigu0= =gtba -----END PGP SIGNATURE----- . Any application that makes use of OpenSSL's SSL/TLS library may be affected. Any application that makes use of OpenSSL's SSL/TLS library may be affected. Recommendations --------------- Upgrade to OpenSSL 0.9.7d or 0.9.6m. Recompile any OpenSSL applications statically linked to OpenSSL libraries. OpenSSL 0.9.7d and OpenSSL 0.9.6m are available for download via HTTP and FTP from the following master locations (you can find the various FTP mirrors under http://www.openssl.org/source/mirror.html): ftp://ftp.openssl.org/source/ The distribution file names are: o openssl-0.9.7d.tar.gz MD5 checksum: 1b49e90fc8a75c3a507c0a624529aca5 o openssl-0.9.6m.tar.gz [normal] MD5 checksum: 1b63bfdca1c37837dddde9f1623498f9 o openssl-engine-0.9.6m.tar.gz [engine] MD5 checksum: 4c39d2524bd466180f9077f8efddac8c The checksums were calculated using the following command: openssl md5 openssl-0.9*.tar.gz Credits ------- Patches for these issues were created by Dr Stephen Henson (steve@openssl.org) of the OpenSSL core team. The OpenSSL team would like to thank Codenomicon for supplying the TLS Test Tool which was used to discover these vulnerabilities, and Joe Orton of Red Hat for performing the majority of the testing. References ---------- http://www.codenomicon.com/testtools/tls/ http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0079 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0112 URL for this Security Advisory: http://www.openssl.org/news/secadv_20040317.txt

AFFECTED PRODUCTS