Joined: 12 May 2004
|Posted: Thu Jul 02, 2009 9:26 pm Post subject: [ GLSA 200907-02 ] ModSecurity: Denial of Service
|Gentoo Linux Security Advisory
Title: ModSecurity: Denial of Service (GLSA 200907-02)
Date: July 02, 2009
Two vulnerabilities in ModSecurity might lead to a Denial of Service.
ModSecurity is a popular web application firewall for the Apache HTTP server.
Vulnerable: < 2.5.9
Unaffected: >= 2.5.9
Architectures: All supported architectures
Multiple vulnerabilities were discovered in ModSecurity:
- Juan Galiana Lara of ISecAuditors discovered a NULL pointer dereference when processing multipart requests without a part header name (CVE-2009-1902).
- Steve Grubb of Red Hat reported that the "PDF XSS protection" feature does not properly handle HTTP requests to a PDF file that do not use the GET method (CVE-2009-1903).
A remote attacker might send requests containing specially crafted multipart data or send certain requests to access a PDF file, possibly resulting in a Denial of Service (crash) of the Apache HTTP daemon. NOTE: The PDF XSS protection is not enabled by default.
There is no known workaround at this time.
All ModSecurity users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=www-apache/mod_security-2.5.9"