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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2012.0926 Security Bulletin: Potential Denial of Service (DoS) security vulnerability in IBM Sterling External Authentication Server 27 September 2012 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM Sterling External Authentication Server Publisher: IBM Operating System: AIX HP-UX Linux variants Solaris Windows Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2011-4461 Original Bulletin: http://www-01.ibm.com/support/docview.wss?uid=swg21611913 - --------------------------BEGIN INCLUDED TEXT-------------------- Security Bulletin: Potential Denial of Service (DoS) security vulnerability in IBM Sterling External Authentication Server Flash (Alert) Document information Sterling Secure Proxy External Authentication Server Software version: 3.3, 3.3.1, 3.4 Operating system(s): AIX, HP-UX, Linux, Solaris, Windows Reference #: 1611913 Modified date: 2012-09-21 Abstract Potential Denial of Service (DoS) security vulnerability in IBM Sterling External Authentication Server due to a Java HashTable security vulnerability in Jetty (CVE-2011-4461). Content SUMMARY: Potential Denial of Service (Dos) security vulnerability in IBM Sterling External Authentication Server due to multiple Java HashTable security vulnerabilities in the embedded Jetty web server. VULNERABILITY DETAILS: CVE ID: CVE-2011-4461 DESCRIPTION: IBM Sterling External Authentication Server is potentially vulnerable to Denial of Service attacks because one of its embedded components, Jetty, has multiple security vulnerability. The vulnerability is caused by insufficient randomization of hash data structures. A remote attacker could exploit this vulnerability to cause the consumption of CPU resources. Customers who are using IBM Sterling External Authentication Server may be impacted by this Jetty vulnerability which can cause performance or Denial of Service (DoS) issues. CVSS: CVSS Base Score: 2 CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/72017 for the current score CVSS Environmental Score*: Undefined CVSS String: (AV:N/AC:L/Au:N/C:N/I:N/A:P) AFFECTED VERSIONS: The following IBM Sterling External Authentication Server Versions are affected: Version 2.2.00 through 2.2.0.2 Version 2.3.1.0 through 2.3.1.9 Version 2.4.0.0 through 2.4.0.2 Version 2.4.1.0 (GA) REMEDIATION: The recommended solution is to apply the fix for each version as soon as practical. See below for information on fixes available. For V2.2.0.0 through 2.3.1.9: Install Fix Pack 10 (2.3.1.10), or later, if your environment is not already at this level. Customers at releases prior to SEAS 2.3.1 should use this Fix Pack to upgrade to SEAS 2.3.1.10. For V2.4.0.0 through 2.4.0.4: Install Fix Pack 3 (2.4.0.3) or later, if your environment is not already at this level. For V2.4.1.0 through 2.4.1.4: Install Fix Pack 1 (2.4.1.1). WORKAROUND(S): None known; apply fixes MITIGATION(S): None known REFERENCES: Complete CVSS Guide On-line Calculator V2 X-Force Vulnerability Database CVE-2011-4461 For more information see: http://www.ocert.org/advisories/ocert-2011-003.html http://www.kb.cert.org/vuls/id/903934 http://www.nruns.com/_downloads/advisory28122011.pdf Patch: https://bugzilla.redhat.com/show_bug.cgi?id=781677 RELATED INFORMATION: IBM Secure Engineering Web Portal IBM Product Security Incident Response Blog *The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Flash. Note: According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY Copyright and trademark information IBM, the IBM logo and ibm.com are trademarks of International Business Machines Corp., registered in many jurisdictions worldwide. Other product and service names might be trademarks of IBM or other companies. A current list of IBM trademarks is available on the Web at "Copyright and trademark information" at www.ibm.com/legal/copytrade.shtml. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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