ID

VAR-200110-0280

CVE

CVE-2006-2940

TITLE

OpenSSL SSLv2 client code fails to properly check for NULL

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. A flaw in the OpenSSL library could allow a remote attacker to cause a denial of service on an affected application. 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. Oracle has released a Critical Patch Update advisory for January 2007 to address these vulnerabilities for supported releases. Earlier unsupported releases are likely to be affected by these issues as well. The issues identified by the vendor affect all security properties of the Oracle products and present local and remote threats. Various levels of authorization are needed to leverage some of the issues, but other issues do not require any authorization. The most severe of the vulnerabilities could possibly expose affected computers to complete compromise. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 SUPPORT COMMUNICATION - SECURITY BULLETIN Document ID: c00849540 Version: 1 HPSBUX02186 SSRT071299 rev.1 - HP-UX running Apache Remote Execution of Arbitrary Code, Denial of Service (DoS), Unauthorized Access NOTICE: The information in this Security Bulletin should be acted upon as soon as possible. Release Date: 2007-01-17 Last Updated: 2007-01-23 Potential Security Impact: Remote execution of arbitrary code, Denial of Service (DoS), and unauthorized access. Source: Hewlett-Packard Company, HP Software Security Response Team VULNERABILITY SUMMARY Potential security vulnerabilities have been identified with Apache running on HP-UX. These vulnerabilities could be exploited remotely to allow execution of arbitrary code, Denial of Service (DoS), or unauthorized access. References: CVE-2006-2940, CVE-2006-2937, CVE-2006-3738, CVE-2006-4343, CVE-2006-4339, CVE-2005-2969. SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed. HP-UX B.11.11, B.11.23, and B.11.31 running Apache-based Web Server prior to v.2.0.58.01 BACKGROUND AFFECTED VERSIONS For IPv4: HP-UX B.11.00 HP-UX B.11.11 =========== hpuxwsAPACHE action: install revision A.2.0.58.01 or subsequent restart Apache URL:http://h20293.www2.hp.com/cgi-bin/swdepot_parser.cgi/cgi/displayProductInfo.pl?productNumber=HPUXWSSUITE For IPv6: HP-UX B.11.11 =========== hpuxwsAPACHE,revision=B.1.0.00.01 hpuxwsAPACHE,revision=B.1.0.07.01 hpuxwsAPACHE,revision=B.1.0.08.01 hpuxwsAPACHE,revision=B.1.0.09.01 hpuxwsAPACHE,revision=B.1.0.10.01 hpuxwsAPACHE,revision=B.2.0.48.00 hpuxwsAPACHE,revision=B.2.0.49.00 hpuxwsAPACHE,revision=B.2.0.50.00 hpuxwsAPACHE,revision=B.2.0.51.00 hpuxwsAPACHE,revision=B.2.0.52.00 hpuxwsAPACHE,revision=B.2.0.53.00 hpuxwsAPACHE,revision=B.2.0.54.00 hpuxwsAPACHE,revision=B.2.0.55.00 hpuxwsAPACHE,revision=B.2.0.56.00 hpuxwsAPACHE,revision=B.2.0.58.00 action: install revision B.2.0.58.01 or subsequent restart Apache URL:http://h20293.www2.hp.com/cgi-bin/swdepot_parser.cgi/cgi/displayProductInfo.pl?productNumber=HPUXWSSUITE HP-UX B.11.23 =========== hpuxwsAPACHE action: install revision B.2.0.58.01 or subsequent restart Apache URL:http://h20293.www2.hp.com/cgi-bin/swdepot_parser.cgi/cgi/displayProductInfo.pl?productNumber=HPUXWSSUITE END AFFECTED VERSIONS RESOLUTION HP has made the following software updates available to resolve the issue. Software updates for the Apache-based Web Server are available from: http://h20293.www2.hp.com/cgi-bin/swdepot_parser.cgi/cgi/displayProductInfo.pl?productNumber=HPUXWSSUITE HP-UX B.11.00, B.11.11 and HP-UX B.11.23 require the Apache-based Web Server v.2.0.58.01 or subsequent. Apache Update Procedure Check for Apache Installation ----------------------------- To determine if the Apache web server from HP is installed on your system, use Software Distributor's swlist command. All three revisions of the product may co-exist on a single system. For example, the results of the command swlist -l product | grep -I apache hpuxwsAPACHE B.2.0.55.00 HP-UX Apache-based Web Server Stop Apache ------------- Before updating, make sure the previous Apache binary is stopped. If Apache is not stopped, the installation would be successful but the new version would be prevented from starting until a later time. After determining which Apache is installed, stop Apache with the following commands: for hpuxwsAPACHE: /opt/hpws/apache[32]/bin/apachectl stop Download and Install Apache -------------------------- Download Apache from Software Depot. http://h20293.www2.hp.com/cgi-bin/swdepot_parser.cgi/cgi/displayProductInfo.pl?productNumber=HPUXWSSUITE Verify successful download by comparing the cksum with the value specified on the installation web page. Use SD to swinstall the depot. Installation of this new revision of HP Apache over an existing HP Apache installation is supported, while installation over a non-HP Apache is NOT supported. Removing Apache Installation --------------------------- The potential vulnerability can also be resolved by removing Apache rather than installing a newer revision. To remove Apache use both Software Distributor's "swremove" command and also "rm -rf" the home location as specified in the rc.config.d file "HOME" variables. %ls /etc/rc.config.d | \ grep apache hpapache2conf hpws_apache[32]conf MANUAL ACTIONS: Yes - Update plus other actions Install the revision of the product. PRODUCT SPECIFIC INFORMATION HP-UX Security Patch Check: Security Patch Check revision B.02.00 analyzes all HP-issued Security Bulletins to provide a subset of recommended actions that potentially affect a specific HP-UX system. For more information: http://software.hp.com/portal/swdepot/displayProductInfo.do?productNumber=B6834AA HISTORY: rev.1 - 23 January 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. -----BEGIN PGP SIGNATURE----- Version: PGP 8.1 iQA/AwUBRbc7fOAfOvwtKn1ZEQJs6ACg9AMS2ZtEgsaZh7T9e8Q0OgyfmEQAni1I otH/juFiPayhwdxQwX1pZwdm =e4BA -----END PGP SIGNATURE----- . OpenSSL Security Advisory [28th September 2006] New OpenSSL releases are now available to correct four security issues. ASN.1 Denial of Service Attacks (CVE-2006-2937, CVE-2006-2940) ============================================================== Vulnerability ------------- Dr. S. N. Henson recently developed an ASN.1 test suite for NISCC (www.niscc.gov.uk). 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 (CVE-2006-2937). Certain types of public key can take disproportionate amounts of time to process. This could be used by an attacker in a denial of service attack (CVE-2006-2940). Any code which uses OpenSSL to parse ASN.1 data from untrusted sources is affected. This includes SSL servers which enable client authentication and S/MIME applications. Acknowledgements ---------------- The OpenSSL team thank Dr S. N. Henson of Open Network Security and NISCC for funding the ASN.1 test suite project. SSL_get_shared_ciphers() buffer overflow (CVE-2006-3738) ======================================================== Vulnerability ------------- 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 (CVE-2006-3738). Acknowledgements ---------------- The OpenSSL team thank Tavis Ormandy and Will Drewry of the Google Security Team for reporting this issue. SSLv2 Client Crash (CVE-2006-4343) ================================== Vulnerability ------------- A flaw in the SSLv2 client code was discovered. Acknowledgements ---------------- The OpenSSL team thank Tavis Ormandy and Will Drewry of the Google Security Team for reporting this issue. Recommendations =============== These vulnerabilities are resolved in the following versions of OpenSSL: - in the 0.9.7 branch, version 0.9.7l (or later); - in the 0.9.8 branch, version 0.9.8d (or later). OpenSSL 0.9.8d and OpenSSL 0.9.7l are available for download via HTTP and FTP from the following master locations (you can find the various FTP mirrors under https://www.openssl.org/source/mirror.html): o https://www.openssl.org/source/ o ftp://ftp.openssl.org/source/ The distribution file names are: o openssl-0.9.8d.tar.gz MD5 checksum: 8ed1853538e1d05a1f5ada61ebf8bffa SHA1 checksum: 4136fba00303a3d319d2052bfa8e1f09a2e12fc2 o openssl-0.9.7l.tar.gz MD5 checksum: b21d6e10817ddeccf5fbe1379987333e SHA1 checksum: f0e4136639b10cbd1227c4f7350ff7ad406e575d The checksums were calculated using the following commands: openssl md5 openssl-0.9*.tar.gz openssl sha1 openssl-0.9*.tar.gz After upgrading make sure to recompile any applications statically linked to OpenSSL libraries and restart all applications that use OpenSSL. References ========== URL for this Security Advisory: https://www.openssl.org/news/secadv_20060928.txt

AFFECTED PRODUCTS