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Security Bulletin: Potential Denial of Service (DoS) security vulnerability in IBM Sterling External Authentication Server

Flash (Alert)


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: 5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/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
    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

  • Cross reference information
    Segment Product Component Platform Version Edition
    Commerce Sterling Connect:Direct for HP NonStop External Authentication Server HP NonStop 3.6, 3.5, 3.4
    Commerce Sterling Connect:Direct for i5/OS External Authentication Server i5/OS, IBM i 3.7, 3.6, 3.5
    Commerce Sterling Connect:Direct for Microsoft Windows External Authentication Server Windows 4.6, 4.5, 4.4
    Commerce Sterling Connect:Direct for OpenVMS External Authentication Server OpenVMS 3.6, 3.5, 3.4, 3.3
    Commerce Sterling Connect:Direct for VM/VSE External Authentication Server VM/ESA, VSE/ESA 3.2
    Commerce Sterling Connect:Direct for z/OS External Authentication Server z/OS 5.1, 5.0, 4.8, 4.7
    Commerce Sterling Connect:Enterprise for UNIX External Authentication Server AIX, HP-UX, Linux, Solaris 2.5, 2.4
    Commerce Sterling Connect:Enterprise for z/OS External Authentication Server z/OS 1.5, 1.4, 1.3
    Commerce Sterling Connect:Direct for UNIX External Authentication Server AIX, HP-UX, Linux, Solaris 4.1, 4.0, 3.8

    Document information

    More support for: 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: 21 September 2012


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