Detections
Analytics

Apache Tomcat 7.0.x < 7.0.23 Hash Collision DoS

medium Nessus Network Monitor Plugin ID 6334

Synopsis

The remote web server is affected by a denial of service vulnerability.

Description

According to its self-reported version number, the instance of Apache Tomcat 7.x listening on the remote host is prior to 7.0.23. It is, therefore, affected by a denial of service vulnerability.

Large numbers of crafted form parameters can cause excessive CPU consumption due to hash collisions.

Note that Nessus Network Monitor has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Apache Tomcat version 7.0.23 or later. Alternatively, as a workaround, set the 'maxPostSize' configuration variable to the lowest sensible value required to support your hosted applications.

See Also

http://www.nessus.org/u?d97dc97c,http://www.nruns.com/_downloads/advisory28122011.pdf,http://tomcat.apache.org/security-7.html#Fixed_in_Apache_Tomcat_7.0.23

Plugin Details

Severity: Medium

ID: 6334

Family: Web Servers

Published: 2/22/2012

Updated: 3/6/2019

Nessus ID: 57541

Risk Information

VPR

Risk Factor: Low

Score: 3.5

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

Vulnerability Information

CPE: cpe:/a:apache:tomcat

Patch Publication Date: 11/25/2011

Vulnerability Publication Date: 12/28/2011

Reference Information

CVE: CVE-2011-4858

BID: 51200