Squid < 3.0.STABLE19 / 3.1.0.14 / 2.6.STABLE23 strListGetItem Function Remote DoS

medium Nessus Plugin ID 44400

Synopsis

The remote proxy server is prone to a denial of service attack.

Description

According to its banner, the version of the Squid proxy caching server installed on the remote host is older than 3.0.STABLE19 / 3.1.0.14 / 2.6.STABLE23. A bug in the 'strListGetItem()' function in 'src/HttpHeaderTools.c' can result in an infinite loop when processing a specially crafted auth header with certain comma delimiters.

A remote attacker may be able to leverage this issue to cause a denial of service.

Solution

Upgrade to Squid version 3.0.STABLE19 / 3.1.0.14 / 2.6.STABLE23 or later.

See Also

https://bugs.squid-cache.org/show_bug.cgi?id=2541

http://www.nessus.org/u?d0f03356

http://www.nessus.org/u?8bf8993a

http://www.nessus.org/u?d23f7691

Plugin Details

Severity: Medium

ID: 44400

File Name: squid_auth_header_dos.nasl

Version: 1.12

Type: remote

Family: Firewalls

Published: 2/5/2010

Updated: 11/15/2018

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

Vulnerability Information

CPE: cpe:/a:squid-cache:squid

Required KB Items: www/squid, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 9/6/2009

Vulnerability Publication Date: 12/2/2008

Reference Information

CVE: CVE-2009-2855

BID: 36091

CWE: 20

Secunia: 36378