cve/2011/CVE-2011-4415.md

CVE-2011-4415

Description

The ap_pregsub function in server/util.c in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x through 2.2.21, when the mod_setenvif module is enabled, does not restrict the size of values of environment variables, which allows local users to cause a denial of service (memory consumption or NULL pointer dereference) via a .htaccess file with a crafted SetEnvIf directive, in conjunction with a crafted HTTP request header, related to (1) the "len +=" statement and (2) the apr_pcalloc function call, a different vulnerability than CVE-2011-3607.

POC

Reference

• http://www.halfdog.net/Security/2011/ApacheModSetEnvIfIntegerOverflow/
• http://www.halfdog.net/Security/2011/ApacheModSetEnvIfIntegerOverflow/DemoExploit.html

Github

• https://github.com/ARPSyndicate/cvemon
• https://github.com/DButter/whitehat_public
• https://github.com/Dokukin1/Metasploitable
• https://github.com/GiJ03/ReconScan
• https://github.com/Iknowmyname/Nmap-Scans-M2
• https://github.com/MrFrozenPepe/Pentest-Cheetsheet
• https://github.com/NikulinMS/13-01-hw
• https://github.com/RoliSoft/ReconScan
• https://github.com/SecureAxom/strike
• https://github.com/Zhivarev/13-01-hw
• https://github.com/issdp/test
• https://github.com/kasem545/vulnsearch
• https://github.com/matoweb/Enumeration-Script
• https://github.com/smabramov/Vulnerabilities-and-attacks-on-information-systems
• https://github.com/syadg123/pigat
• https://github.com/teamssix/pigat
• https://github.com/xxehacker/strike
• https://github.com/zzzWTF/db-13-01