Permissions, Privileges, and Access Controls in ModSecurity - CVE-2012-4528

Vulnerability details

The vulnerability allows a remote non-authenticated attacker to manipulate data.

The mod_security2 module before 2.7.0 for the Apache HTTP Server allows remote attackers to bypass rules, and deliver arbitrary POST data to a PHP application, via a multipart request in which an invalid part precedes the crafted data.

Affected software

How to mitigate CVE-2012-4528

Links to Public Exploits and PoC-codes

• Exploit #4320 - ModSecurity - POST Parameters Security Bypass (August 11, 2020)

External References

• http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093011.html
• http://lists.opensuse.org/opensuse-updates/2013-08/msg00020.html
• http://lists.opensuse.org/opensuse-updates/2013-08/msg00025.html
• http://lists.opensuse.org/opensuse-updates/2013-08/msg00031.html
• http://mod-security.svn.sourceforge.net/viewvc/mod-security/m2/branches/2.7.x/CHANGES
• http://mod-security.svn.sourceforge.net/viewvc/mod-security/m2/trunk/apache2/msc_multipart.c?sortby=date&r1=2081&r2=2080&pathrev=2081
• http://mod-security.svn.sourceforge.net/viewvc/mod-security?view=revision&sortby=date&revision=2081
• http://seclists.org/fulldisclosure/2012/Oct/113
• http://www.openwall.com/lists/oss-security/2012/10/18/14
• https://www.sec-consult.com/fxdata/seccons/prod/temedia/advisories_txt/20121017-0_mod_security_ruleset_bypass.txt

Related Security Bulletins

• Permissions, Privileges, and Access Controls in Trustwave ModSecurity
• Fedora EPEL 6 update for mod_security, mod_security_crs
• Fedora EPEL 5 update for mod_security