Security Bulletin: Vulnerability in IBM HTTP Server used by WebSphere Application Server

Security Bulletin

Summary

There is a vulnerability in the IBM HTTP Server used by WebSphere Application Server. This has been addressed.

Vulnerability Details

CVEID: CVE-2021-39275
DESCRIPTION: Apache HTTP Server is vulnerable to a buffer overflow, caused by improper bounds checking by the ap_escape_quotes() function. By sending specially crafted input, a remote attacker could write beyond the end of a buffer.
CVSS Base score: 3.7
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/209529 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N)

Affected Products and Versions

This vulnerability affects the following version and release of IBM HTTP Server (powered by Apache) component in all editions of WebSphere Application Server and bundling products.

Affected Product(s)	Version(s)
IBM HTTP Server	9.0
IBM HTTP Server	8.5
IBM HTTP Server	8.0
IBM HTTP Server	7.0

Remediation/Fixes

For IBM HTTP Server used by WebSphere Application Server:

For V9.0.0.0 through 9.0.5.9:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH40343
--OR--
· Apply Fix Pack 9.0.5.10 or later (targeted availability 4Q2021).

For V8.5.0.0 through 8.5.5.20:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH40343
--OR--
· Apply Fix Pack 8.5.5.21 or later (targeted availability 1Q2022).

For V8.0.0.0 through 8.0.0.15:
· Upgrade to 8.0.0.15 and then apply Interim Fix PH40343

For V7.0.0.0 through 7.0.0.45:
· Upgrade to 7.0.0.45 and then apply Interim Fix PH40343

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

IBM HTTP Server V7.0 and V8.0 are no longer in full support; IBM recommends upgrading to a fixed, supported version/release/platform of the product.

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

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Acknowledgement

Change History

29 Sep 2021: 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

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location

Worldwide

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Tips

Security Bulletin: Vulnerability in IBM HTTP Server used by WebSphere Application Server