--- title: "CVE-2011-1928\n | Ubuntu" description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/CVE-2011-1928?format=md keywords: index, follow --- # CVE-2011-1928 Publication date 24 May 2011 Last updated 4 August 2025 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) Toggle side navigation ## 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. ### From the Ubuntu Security Team Is was discovered that the fix for CVE-2011-0419 introduced a different flaw in the fnmatch() implementation that could also result in a denial of service. (CVE-2011-1928) ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | apache2 | 11.04 natty | Not affected | | 10.10 maverick | Not affected | | 10.04 LTS lucid | Not affected | | 8.04 LTS hardy | Not affected | | 6.06 LTS dapper | Fixed 2.0.55-4ubuntu2.13 | | apr | 11.04 natty | Fixed 1.4.2-7ubuntu2.1 | | 10.10 maverick | Fixed 1.4.2-3ubuntu1.1 | | 10.04 LTS lucid | Fixed 1.3.8-1ubuntu0.3 | | 8.04 LTS hardy | Fixed 1.2.11-1ubuntu0.2 | | 6.06 LTS dapper | Not in release | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1928) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2011-1928) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2011-1928) * [Debian](https://security-tracker.debian.org/tracker/CVE-2011-1928) ### Related Ubuntu Security Notices (USN) + [USN-1134-1](https://usn.ubuntu.com/USN-1134-1) + APR vulnerabilities + 24 May 2011 ### Other references * *