ID

VAR-200110-0280

CVE

CVE-2006-2940

TITLE

X.509 certificate verification may be vulnerable to resource exhaustion

DESCRIPTION

OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows attackers to cause a denial of service (CPU consumption) via parasitic public keys with large (1) "public exponent" or (2) "public modulus" values in X.509 certificates that require extra time to process when using RSA signature verification. Some applications that perform X.509 certificate verification may be vulnerable to signature processing problems that lead to resource exhaustion. This vulnerability may cause a denial of service. Multiple RSA implementations fail to properly handle RSA signatures. This vulnerability may allow an attacker to forge RSA signatures. OpenSSL is prone to a denial-of-service vulnerability because it fails to validate the lengths of public keys being used. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 - ------------------------------------------------------------------- VMware Security Advisory Advisory ID: VMSA-2007-0001 Synopsis: VMware ESX server security updates Issue date: 2007-01-08 Updated on: 2007-01-08 CVE: CVE-2006-3589 CVE-2006-2937 CVE-2006-2940 CVE-2006-3738 CVE-2006-4339 CVE-2006-4343 CVE-2006-4980 - ------------------------------------------------------------------- 1. Summary: Updated ESX Patches address several security issues. 2. Relevant releases: VMware ESX 3.0.1 without patch ESX-9986131 VMware ESX 3.0.0 without patch ESX-3069097 VMware ESX 2.5.4 prior to upgrade patch 3 VMware ESX 2.5.3 prior to upgrade patch 6 VMware ESX 2.1.3 prior to upgrade patch 4 VMware ESX 2.0.2 prior to upgrade patch 4 3. Problem description: Problems addressed by these patches: a. Incorrect permissions on SSL key files generated by vmware-config (CVE-2006-3589): ESX 3.0.1: does not have this problem ESX 3.0.0: does not have this problem ESX 2.5.4: corrected by ESX 2.5.4 Upgrade Patch 3 (Build# 36502) ESX 2.5.3: corrected by ESX 2.5.3 Upgrade Patch 6 (Build# 35703) ESX 2.1.3: corrected by ESX 2.1.3 Upgrade Patch 4 (Build# 35803) ESX 2.0.2: corrected by ESX 2.0.2 Upgrade Patch 4 (Build# 35801) A possible security issue with the configuration program vmware-config which could set incorrect permissions on SSL key files. Local users may be able to obtain access to the SSL key files. The Common Vulnerabilities and Exposures project (cve.mitre.org) assigned the name CVE-2006-3589 to this issue. b. OpenSSL library vulnerabilities: ESX 3.0.1: corrected by ESX 3.0.1 Patch ESX-9986131 ESX 3.0.0: corrected by ESX 3.0.0 Patch ESX-3069097 ESX 2.5.4: corrected by ESX 2.5.4 Upgrade Patch 3 (Build# 36502) ESX 2.5.3: corrected by ESX 2.5.3 Upgrade Patch 6 (Build# 35703) ESX 2.1.3: corrected by ESX 2.1.3 Upgrade Patch 4 (Build# 35803) ESX 2.0.2: corrected by ESX 2.0.2 Upgrade Patch 4 (Build# 35801) (CVE-2006-2937) OpenSSL 0.9.7 before 0.9.7l and 0.9.8 before 0.9.8d allows remote attackers to cause a denial of service (infinite loop and memory consumption) via malformed ASN.1 structures that trigger an improperly handled error condition. (CVE-2006-4339) OpenSSL before 0.9.7, 0.9.7 before 0.9.7k, and 0.9.8 before 0.9.8c, when using an RSA key with exponent 3, removes PKCS-1 padding before generating a hash, which allows remote attackers to forge a PKCS #1 v1.5 signature that is signed by that RSA key and prevents OpenSSL from correctly verifying X.509 and other certificates that use PKCS #1. (CVE-2006-4343) The get_server_hello function in the SSLv2 client code in OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows remote servers to cause a denial of service (client crash) via unknown vectors that trigger a null pointer dereference. The Common Vulnerabilities and Exposures project (cve.mitre.org) assigned the names CVE-2006-2937, CVE-2006-2940, CVE-2006-3738, CVE-2006-4339, and CVE-2006-4343 to these issues. c. Updated OpenSSH package addresses the following possible security issues: ESX 3.0.1: corrected by Patch ESX-9986131 ESX 3.0.0: corrected by Patch ESX-3069097 ESX 2.5.4: does not have these problems ESX 2.5.3: does not have these problems ESX 2.1.3: does not have these problems ESX 2.0.2: does not have these problems (CVE-2004-2069) sshd.c in OpenSSH 3.6.1p2 and 3.7.1p2 and possibly other versions, when using privilege separation, does not properly signal the non-privileged process when a session has been terminated after exceeding the LoginGraceTime setting, which leaves the connection open and allows remote attackers to cause a denial of service (connection consumption). (CVE-2006-0225) scp in OpenSSH 4.2p1 allows attackers to execute arbitrary commands via filenames that contain shell metacharacters or spaces, which are expanded twice. (CVE-2003-0386) OpenSSH 3.6.1 and earlier, when restricting host access by numeric IP addresses and with VerifyReverseMapping disabled, allows remote attackers to bypass "from=" and "user@host" address restrictions by connecting to a host from a system whose reverse DNS hostname contains the numeric IP address. (CVE-2006-4924) sshd in OpenSSH before 4.4, when using the version 1 SSH protocol, allows remote attackers to cause a denial of service (CPU consumption) via an SSH packet that contains duplicate blocks, which is not properly handled by the CRC compensation attack detector. NOTE: ESX by default disables version 1 SSH protocol. (CVE-2006-5051) Signal handler race condition in OpenSSH before 4.4 allows remote attackers to cause a denial of service (crash), and possibly execute arbitrary code if GSSAPI authentication is enabled, via unspecified vectors that lead to a double-free. NOTE: ESX doesn't use GSSAPI by default. (CVE-2006-5794) Unspecified vulnerability in the sshd Privilege Separation Monitor in OpenSSH before 4.5 causes weaker verification that authentication has been successful, which might allow attackers to bypass authentication. NOTE: as of 20061108, it is believed that this issue is only exploitable by leveraging vulnerabilities in the unprivileged process, which are not known to exist. The Common Vulnerabilities and Exposures project (cve.mitre.org) assigned the names CVE-2004-2069, CVE-2006-0225, CVE-2003-0386, CVE-2006-4924, CVE-2006-5051, and CVE-2006-5794 to these issues. d. Object reuse problems with newly created virtual disk (.vmdk or .dsk) files: ESX 3.0.1: does not have this problem ESX 3.0.0: does not have this problem ESX 2.5.4: corrected by ESX 2.5.4 Upgrade Patch 3 (Build# 36502) ESX 2.5.3: corrected by ESX 2.5.3 Upgrade Patch 6 (Build# 35703) ESX 2.1.3: corrected by ESX 2.1.3 Upgrade Patch 4 (Build# 35803) ESX 2.0.2: corrected by ESX 2.0.2 Upgrade Patch 4 (Build# 35801) A possible security issue with virtual disk (.vmdk or .dsk) files that are newly created, but contain blocks from recently deleted virtual disk files. Information belonging to the previously deleted virtual disk files could be revealed in newly created virtual disk files. VMware recommends the following workaround: When creating new virtual machines on an ESX Server that may contain sensitive data, use vmkfstools with the -W option. This initializes the virtual disk with zeros. NOTE: ESX 3.x defines this option as -w. e. Buffer overflow in Python function repr(): ESX 3.0.1: corrected by Patch ESX-9986131 ESX 3.0.0: corrected by ESX-3069097 ESX 2.5.4: does not have this problem ESX 2.5.3: does not have this problem ESX 2.1.3: does not have this problem ESX 2.0.2: does not have this problem A possible security issue with how the Python function repr() function handles UTF-32/UCS-4 strings. Python applications using this function can open a security vulnerability that could allow the execution of arbitrary code. The Common Vulnerabilities and Exposures project (cve.mitre.org) assigned the name CVE-2006-4980 to this issue. 4. Solution: Please review the Patch notes for your version of ESX and verify the md5sum. ESX 3.0.1 http://www.vmware.com/support/vi3/doc/esx-9986131-patch.html md5usm: 239375e107fd4c7af57663f023863fcb ESX 3.0.0 http://www.vmware.com/support/vi3/doc/esx-3069097-patch.html md5sum: ca9947239fffda708f2c94f519df33dc ESX 2.5.4 http://www.vmware.com/support/esx25/doc/esx-254-200612-patch.html md5sum: 239375e107fd4c7af57663f023863fcb ESX 2.5.3 http://www.vmware.com/support/esx25/doc/esx-253-200612-patch.html md5sum: f90fcab28362edbf2311f3ca90cc7739 ESX 2.1.3 http://www.vmware.com/support/esx21/doc/esx-213-200612-patch.html md5sum: 7d7d0e40f4dccd5ca64b9c13a856da8f ESX 2.0.2 http://www.vmware.com/support/esx2/doc/esx-202-200612-patch.html md5sum: 925e70f28d17714c53fdbd24de64329f 5. References: ESX 3.0.0 Patch URL: http://www.vmware.com/support/vi3/doc/esx-3069097-patch.html Knowledge base URL: http://kb.vmware.com/kb/3069097 ESX 3.0.1 Patch URL: http://www.vmware.com/support/vi3/doc/esx-9986131-patch.html Knowledge base URL: http://kb.vmware.com/kb/9986131 ESX 2.5.4 Patch URL: http://www.vmware.com/support/esx25/doc/esx-254-200612-patch.html ESX 2.5.3 Patch URL: http://www.vmware.com/support/esx25/doc/esx-253-200612-patch.html ESX 2.1.3 Patch URL: http://www.vmware.com/support/esx21/doc/esx-213-200612-patch.html ESX 2.0.2 Patch URL: http://www.vmware.com/support/esx2/doc/esx-202-200612-patch.html http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3589 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2937 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2940 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3738 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4339 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4343 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4980 6. Contact: http://www.vmware.com/security VMware Security Response Policy http://www.vmware.com/vmtn/technology/security/security_response.html E-mail: security@vmware.com Copyright 2007 VMware Inc. All rights reserved. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFFovs16KjQhy2pPmkRCMfyAKCXhdGwZyXW5VzSwcOmu2NNXKN/OwCgo+CE neFG0RikD74TCYeXKW6CBy4= =9/6k -----END PGP SIGNATURE----- _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/ . ASN.1 Denial of Service Attack (1/2) During the parsing of certain invalid ASN.1 structures an error condition is mishandled. This can result in an infinite loop which consumes system memory. ASN.1 Denial of Service Attack (2/2) Certain types of public key can take disproportionate amounts of time to process. SSL_get_shared_ciphers() Buffer Overflow A buffer overflow was discovered in the SSL_get_shared_ciphers() utility function. An attacker could send a list of ciphers to an application that uses this function and overrun a buffer. SSLv2 Client Crash A flaw in the SSLv2 client code was discovered. ________________________________________________________________________ References: [0] http://www.openssl.org/news/secadv_20060928.txt [1] http://www.openssl.org/ [2] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2937 [3] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2940 [4] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3738 [5] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4343 ________________________________________________________________________ For security reasons, this advisory was digitally signed with the OpenPGP public key "OpenPKG <openpkg@openpkg.org>" (ID 63C4CB9F) of the OpenPKG project which you can retrieve from http://pgp.openpkg.org and hkp://pgp.openpkg.org. Follow the instructions on http://pgp.openpkg.org for details on how to verify the integrity of this advisory. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 SUPPORT COMMUNICATION - SECURITY BULLETIN Document ID: c01118771 Version: 1 HPSBMA02250 SSRT061275 rev.1 - HP System Management Homepage (SMH) for Linux and Windows, Remote Execution of Arbitrary Code and Denial of Service (DoS) NOTICE: The information in this Security Bulletin should be acted upon as soon as possible. Release Date: 2007-08-01 Last Updated: 2007-08-01 Potential Security Impact: Remote execution of arbitrary code and Denial of Service (DoS) Source: Hewlett-Packard Company, HP Software Security Response Team VULNERABILITY SUMMARY Potential security vulnerabilities have been identified HP System Management Homepage (SMH) for Linux and Windows. References: CVE-2006-2937, CVE-2006-2940, CVE-2006-3738, CVE-2006-3747, CVE-2006-4339, CVE-2006-4343 SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed. HP System Management Homepage (SMH) versions prior to 2.1.7 running on Linux and Windows. BACKGROUND RESOLUTION HP has provided System Management Homepage (SMH) version 2.1.7 or subsequent for each platform to resolve this issue. A more recent version is available: System Management Homepage (SMH) version 2.1.8 HP System Management Homepage for Linux (x86) version 2.1.8-177 can be downloaded from http://h18023.www1.hp.com/support/files/server/us/download/26864.html HP System Management Homepage for Linux (AMD64/EM64T) version 2.1.8-177 can be downloaded from http://h18023.www1.hp.com/support/files/server/us/download/26866.html HP System Management Homepage for Windows version 2.1.8-179 can be downloaded from http://h18023.www1.hp.com/support/files/server/us/download/26977.html PRODUCT SPECIFIC INFORMATION HISTORY: Version:1 (rev.1) - 1 August 2007 Initial Release Third Party Security Patches: Third party security patches which are to be installed on systems running HP software products should be applied in accordance with the customer's patch management policy. Support: For further information, contact normal HP Services support channel. Report: To report a potential security vulnerability with any HP supported product, send Email to: security-alert@hp.com It is strongly recommended that security related information being communicated to HP be encrypted using PGP, especially exploit information. To get the security-alert PGP key, please send an e-mail message as follows: To: security-alert@hp.com Subject: get key Subscribe: To initiate a subscription to receive future HP Security Bulletins via Email: http://h30046.www3.hp.com/driverAlertProfile.php?regioncode=NA&langcode=USENG&jumpid=in_SC-GEN__driverITRC&topiccode=ITRC On the web page: ITRC security bulletins and patch sign-up Under Step1: your ITRC security bulletins and patches - check ALL categories for which alerts are required and continue. Under Step2: your ITRC operating systems - verify your operating system selections are checked and save. To update an existing subscription: http://h30046.www3.hp.com/subSignIn.php Log in on the web page: Subscriber's choice for Business: sign-in. On the web page: Subscriber's Choice: your profile summary - use Edit Profile to update appropriate sections. To review previously published Security Bulletins visit: http://www.itrc.hp.com/service/cki/secBullArchive.do * The Software Product Category that this Security Bulletin relates to is represented by the 5th and 6th characters of the Bulletin number in the title: GN = HP General SW MA = HP Management Agents MI = Misc. 3rd Party SW MP = HP MPE/iX NS = HP NonStop Servers OV = HP OpenVMS PI = HP Printing & Imaging ST = HP Storage SW TL = HP Trusted Linux TU = HP Tru64 UNIX UX = HP-UX VV = HP VirtualVault System management and security procedures must be reviewed frequently to maintain system integrity. HP is continually reviewing and enhancing the security features of software products to provide customers with current secure solutions. "HP is broadly distributing this Security Bulletin in order to bring to the attention of users of the affected HP products the important security information contained in this Bulletin. HP recommends that all users determine the applicability of this information to their individual situations and take appropriate action. HP does not warrant that this information is necessarily accurate or complete for all user situations and, consequently, HP will not be responsible for any damages resulting from user's use or disregard of the information provided in this Bulletin. To the extent permitted by law, HP disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose, title and non-infringement." \xa9Copyright 2007 Hewlett-Packard Development Company, L.P. Hewlett-Packard Company shall not be liable for technical or editorial errors or omissions contained herein. The information provided is provided "as is" without warranty of any kind. To the extent permitted by law, neither HP or its affiliates, subcontractors or suppliers will be liable for incidental, special or consequential damages including downtime cost; lost profits; damages relating to the procurement of substitute products or services; or damages for loss of data, or software restoration. The information in this document is subject to change without notice. Hewlett-Packard Company and the names of Hewlett-Packard products referenced herein are trademarks of Hewlett-Packard Company in the United States and other countries. Other product and company names mentioned herein may be trademarks of their respective owners

AFFECTED PRODUCTS