Security Bulletin: IBM HTTP Server (powered by Apache) for IBM i is vulnerable to HTTP request smuggling and a buffer overflow (CVE-2022-22720, CVE-2022-22721)

Summary

IBM HTTP Server (powered by Apache) for IBM i is vulnerable to HTTP requst smuggling and a buffer overflow attack as described in the vulnerability details section. IBM i has addressed the CVEs by providing fixes to the Apache HTTP Server implementation as described in the Remediation/Fixes section.

Vulnerability Details

CVEID:CVE-2022-22720
**DESCRIPTION:**Apache HTTP Server is vulnerable to HTTP request smuggling, caused by the failure to close inbound connection when errors are encountered discarding the request body. An attacker could exploit this vulnerability to poison the web cache, bypass web application firewall protection, and conduct XSS attacks.
CVSS Base score: 7.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/221668 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID:CVE-2022-22721
**DESCRIPTION:**Apache HTTP Server is vulnerable to a buffer overflow, caused by an integer overflow. If LimitXMLRequestBody is set to allow request bodies larger than 350MB, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.
CVSS Base score: 7.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/221666 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

Affected Products and Versions

Remediation/Fixes

The issue can be fixed by applying a PTF to IBM i. IBM i releases 7.5, 7.4, 7.3, and 7.2 will be fixed.

The IBM i PTF numbers contain the fix for the vulnerabilities.

IBM i Release| 5770-DG1
PTF Number| PTF Download Link
—|—|—
7.5| SF99952 Level 2| SF99952
7.4| SI80014| SI80014
7.3| SI79641| SI79641
7.2| SI79640| SI79640

<https://www.ibm.com/support/fixcentral&gt;

_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