ModSecurity < 2.1.1 POST Data Null Byte Filter Bypass

Medium Nessus Network Monitor Plugin ID 6988

Synopsis

The remote web application firewall may be affected by a denial of service vulnerability

Description

According to its banner, the version of ModSecurity installed on the remote host is earlier than 2.1.1. It is, therefore, potentially affected by a security bypass vulnerability. An error exists related to HTTP POST requests and 'application/x-www-form-urlencoded' content containing un-encoded NULL bytes that could allow a remote attacker to bypass certain filters and carry out attacks.

Solution

Upgrade to ModSecurity version 2.1.1 or later.

See Also

http://blog.spiderlabs.com/2007/03/modsecurity-asciiz-evasion.html

Plugin Details

Severity: Medium

ID: 6988

Family: Web Servers

Published: 2013/08/16

Modified: 2018/09/16

Dependencies: 1442

Nessus ID: 67124

Risk Information

Risk Factor: Medium

CVSSv2

Base Score: 6.8

Temporal Score: 5.6

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Temporal Vector: CVSS2#E:F/RL:OF/RC:C

CVSSv3

Base Score: 5.6

Temporal Score: 5.2

Vector: CVSS3#AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Temporal Vector: CVSS3#E:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:modsecurity:modsecurity

Patch Publication Date: 2007/04/11

Vulnerability Publication Date: 2007/03/06

Reference Information

CVE: CVE-2007-1359

BID: 22831