ModSecurity 1.7.4 for Apache 2.x remote off-by-one overflow
S-Quadra Advisory #2004-03-15
Topic: ModSecurity 1.7.4 for Apache 2.x remote off-by-one overflow
Severity: Average
Vendor URL: http://www.modsecurity.org
Advisory URL: http://www.s-quadra.com/advisories/Adv-20040315.txt
Release date: 15 Mar 2004
1. DESCRIPTION
ModSecurity is an open source intrusion detection and prevention engine
for web applications. It supports both branches of the Apache web
server. Please visit http://www.modsecurity.org for more information
about ModSecurity.
2. DETAILS
When directive "SecFilterScanPost" is enabled, ModSecurity checks
incoming POST payloads. In this mode Apache 2.x version of ModSecurity
is vulnerable to off-by-one overflow which could be potentially used by
a remote attacker to execute arbitrary code on a target's web server.
3. FIX INFORMATION
S-Quadra alerted Ivan Ristic (ModSecurity developer) on this issue 09
Feb 2004. Mod_security 1.7.5 which fixes this issue is available.
4. CREDITS
Evgeny Legerov <e.legerov@xxxxxxxxxxxx> is responsible for discovering
this issue.
5. ABOUT
S-Quadra dedicates its substantial knowledge and resources to managing
clients' IT security risks. S-Quadra audits and protection for software
and networks implement pioneering methods and ground-breaking
technologies.
S-Quadra Advisory #2004-03-15