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HistoryOct 13, 2021 - 2:26 p.m.

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

2021-10-1314:26:59
www.ibm.com
15
dos vulnerability
ibm sterling
java hashtable
jetty
security fix
vulnerable versions

EPSS

0.017

Percentile

87.6%

Question

Security Bulletin: Potential Denial of Service (DoS) security vulnerability in IBM Sterling External Authentication Server | -8C6290647F61AF8385257A800060981A- |

Answer

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: 2
CVSS Temporal Score: See <http://xforce.iss.net/xforce/xfdb/72017&gt; 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:

For V2.4.1.0 through 2.4.1.4:

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&gt;
<http://www.kb.cert.org/vuls/id/903934&gt;
<http://www.nruns.com/_downloads/advisory28122011.pdf&gt;
Patch: <https://bugzilla.redhat.com/show_bug.cgi?id=781677&gt;

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 β€œindustry open standard designed to convey vulnerability severity and help to determine urgency and priority of response.” IBM PROVIDES THE CVSS SCORES β€œAS 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:Enterprise Gateway External Authentication Server Windows 2.1 2.0
Commerce Sterling Connect:Direct for UNIX External Authentication Server AIX HP-UX Linux Solaris 4.1 4.0 3.8

[{β€œBusiness Unit”:{β€œcode”:β€œBU055”,β€œlabel”:β€œCognitive Applications”},β€œProduct”:{β€œcode”:β€œSS73G6”,β€œlabel”:β€œSterling Total Payments for Financial Services”},β€œComponent”:β€œβ€,β€œPlatform”:[{β€œcode”:β€œPF025”,β€œlabel”:β€œPlatform Independent”}],β€œVersion”:β€œAll Versions”,β€œEdition”:β€œβ€,β€œLine of Business”:{β€œcode”:β€œβ€,β€œlabel”:β€œβ€}}]

EPSS

0.017

Percentile

87.6%

Related for FB7ED786C134166D7E339FAE4BEE41D4FDB1A491201BB3D2E3095AB5441C2FDA