Squid 3.1.x < 3.1.16 / 3.2.x < 3.2.0.13 DNS Replies CName Record Parsing Remote DoS

medium Nessus Plugin ID 57287

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Synopsis

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

Description

According to its banner, the version of Squid is 3.1.x earlier than than 3.1.16 or 3.2.x earlier than 3.2.0.13. Such versions are affected by a denial of service vulnerability.

The application does not properly free memory when handling DNS replies containing a CNAME record that references another CNAME record that contains an empty A record.

Note that Nessus has relied only on the version in the proxy server's banner, which is not updated by the patch that the project has released to address the issue. If the patch has been applied properly and the service restarted, consider this to be a false positive.

Solution

Upgrade to Squid version 3.1.16 / 3.2.0.13 or later.

Plugin Details

Severity: Medium

ID: 57287

File Name: squid_3_1_16.nasl

Version: 1.8

Type: remote

Family: Firewalls

Published: 12/14/2011

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: 10/8/2011

Vulnerability Publication Date: 10/8/2011

Reference Information

CVE: CVE-2011-4096

BID: 50449

Detections

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