CVE-2007-1359

ModSecurity <= 2.1.0 - Request Rule Bypass via ASCIIZ Byte in POST Data

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2007-1359. PoCs published by Stefan Esser.

AI-analyzed exploit summary This is a technical writeup detailing a POST rules bypass vulnerability in mod_security <= 2.1.0 due to mishandling of ASCIIZ bytes in POST data. It explains the discrepancy between RFC-compliant parsing and real-world HTTP parsers in scripting languages, leading to XSS bypass.

Description

Interpretation conflict in ModSecurity (mod_security) 2.1.0 and earlier allows remote attackers to bypass request rules via application/x-www-form-urlencoded POST data that contains an ASCIIZ (0x00) byte, which mod_security treats as a terminator even though it is still processed as normal data by some HTTP parsers including PHP 5.2.0, and possibly parsers in Perl, and Python.

Exploits (1)

exploitdb WRITEUP VERIFIED
by Stefan Esser · textremotemultiple
https://www.exploit-db.com/exploits/3425

This is a technical writeup detailing a POST rules bypass vulnerability in mod_security <= 2.1.0 due to mishandling of ASCIIZ bytes in POST data. It explains the discrepancy between RFC-compliant parsing and real-world HTTP parsers in scripting languages, leading to XSS bypass.

Classification
Writeup 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: mod_security <= 2.1.0
No auth needed
Prerequisites: A web application using mod_security <= 2.1.0 · Ability to send crafted POST requests
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (15)

Core 15
Core References
Third Party Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2008/2115
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/32872
Third Party Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2007/0868
Exploit, Vendor Advisory x_refsource_misc
http://www.php-security.org/MOPB/BONUS-12-2007.html
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/25316
Third Party Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2008/2109/references
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/24373
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/31087
Third Party Advisory vendor-advisory x_refsource_gentoo
http://www.gentoo.org/security/en/glsa/glsa-200705-17.xml
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/31113
Vendor Advisory vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/22831
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://www.osvdb.org/32778

Scores

EPSS 0.0662
EPSS Percentile 93.0%

Details

Status published
Products (7)
mod_security/mod_security 1.7
mod_security/mod_security 1.7.1
mod_security/mod_security 1.7.2
mod_security/mod_security 1.7.4
mod_security/mod_security 1.7.5
mod_security/mod_security 1.9.4
mod_security/mod_security 2.1
Published Mar 08, 2007
Tracked Since Feb 18, 2026