Apache 2.2 < 2.2.21 mod_proxy_ajp DoS

High Log Correlation Engine Plugin ID 800559

Synopsis

The remote web server is vulnerable to a denial of service attack.

Description

Versions of Apache 2.2 earlier than 2.2.21 are potentially affected by a denial of service vulnerability. An error exists in the mod_proxy_ajp module that can allow specially crafted HTTP requests to cause a backend server to temporarily enter an error state. This vulnerability only occurs when mod_proxy_ajp is used along with mod_proxy_balancer.

Solution

Upgrade to Apache version 2.2.21 or later.

See Also

http://www.apache.org/dist/httpd/CHANGES_2.2.21

httpd.apache.org/security/vulnerabilities_22.html

Plugin Details

Severity: High

ID: 800559

File Name: 800559.prm

Family: Web Servers

Published: 2011/11/03

Nessus ID: 56216

Risk Information

Risk Factor: High

CVSSv2

Base Score: 4.3

Temporal Score: 3.6

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

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

Vulnerability Information

Patch Publication Date: 2011/09/14

Vulnerability Publication Date: 2011/09/14

Reference Information

CVE: CVE-2011-3348

BID: 49616