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Security Bulletin: IBM HTTP Server (powered by Apache) for i is vulnerable to CVE-2021-44224

Security Bulletin


Summary

IBM HTTP Server (powered by Apache) for i is vulnerable to the issue described in the vulnerability details section. IBM i has addressed the applicable CVE in the Apache HTTP Server implementation.

Vulnerability Details

CVEID:   CVE-2021-44224
DESCRIPTION:   Apache HTTP Server is vulnerable to a denial of service or server-side request forgery. By sending a specially crafted URI to httpd configured as a forward proxy, an attacker could exploit this vulnerability to cause a NULL pointer dereference. By sending a specially crafted URI to configurations mixing forward and reverse proxy declarations, an attacker could allow for requests to be directed to a declared Unix Domain Socket endpoint.
CVSS Base score: 8.2
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/215719 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H)

Affected Products and Versions

Affected Product(s)Version(s)
IBM i7.4
IBM i7.3
IBM i7.2

Remediation/Fixes

The issue can be fixed by applying a PTF to IBM i.  Releases 7.4, 7.3, and 7.2 of IBM i will be fixed.
The IBM i PTF numbers containing the fix for the CVE follows.  Future Group PTFs for HTTP Server will also contain the fixes for this CVE.

Release 7.4 -  SI78295, SI78296
Release 7.3 -  SI78298, SI78299
Release 7.2 -  SI78297

https://www.ibm.com/support/fixcentral

Important note: IBM recommends that all users running unsupported versions of affected products upgrade to supported and fixed version of affected products.

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

28 Feb 2022: 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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Document Information

Modified date:
28 February 2022

Initial Publish date:
28 February 2022

UID

ibm16560266

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