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Security Bulletin: IBM HTTP Server is vulnerable to a denial of service (CVE-2023-26281)

Security Bulletin


Summary

IBM HTTP Server, which is used by IBM WebSphere Application Server, is vulnerable to a denial of service using a specially crafted URL. This has been addressed in the remediation section below.

Vulnerability Details

CVEID:   CVE-2023-26281
DESCRIPTION:   IBM HTTP Server used by IBM WebSphere Application Server could allow a remote user to cause a denial of service using a specially crafted URL.
CVSS Base score: 5.9
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/248296 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Affected Product(s)Version(s)
IBM HTTP Server8.5

Remediation/Fixes

IBM strongly recommends addressing the vulnerability now by applying a currently available interim fix or fix pack that contains APAR PH52754.

For IBM HTTP Server used by IBM WebSphere Application Server:

For V8.5.5.22 through 8.5.5.23:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH52754
--OR--
· Apply Fix Pack 8.5.5.24 or later (targeted availability 3Q2023).

 

 Additional interim fixes may be available and linked off the interim fix download page.

Important Note

 IBM strongly suggests that all System z customers be subscribed to the System z Security Portal to receive the latest critical System z security and
 integrity service. If you are not subscribed, see the instructions on the System z Security web site. Security and integrity APARs and associated fixes will
 be posted to this portal. IBM suggests reviewing the CVSS scores and applying all security or integrity fixes as soon as possible to minimize any potential
 risk.

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

References

Off

Change History

27 Feb 2023: Initial Publication

*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 Security Bulletin.

Disclaimer

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. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

Document Location

Worldwide

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Document Information

Modified date:
27 February 2023

UID

ibm16958522