Detections
Analytics

Squid 3.5.x < 3.5.18 Multiple Vulnerabilities

medium Nessus Network Monitor Plugin ID 9776

Synopsis

The remote proxy server is affected by multiple attack vectors.

Description

Versions of Squid 3.5.x prior to 3.5.18 are affected by multiple vulnerabilities :

 - A flaw is triggered as input is not properly validated when handling HTTP request messages. This may allow a remote attacker to conduct a cache poisoning attack.
 - A flaw is triggered as input is not properly sanitized when handling specially crafted host headers. This may allow a remote attacker to bypass same-origin protection mechanisms and cause the program to contact the wrong origin server. This may also poison downstream caches.
 - Flaws in pointer handling and reference counting are triggered when handling specially crafted ESI response syntax. This may allow a remote server to cause a denial of service for Squid clients.

Solution

Either upgrade to Squid version 3.5.18 or later, or apply the vendor-supplied patch.

See Also

http://www.squid-cache.org/Advisories/SQUID-2016_9.txt

Plugin Details

Severity: Medium

ID: 9776

Family: Web Servers

Published: 11/11/2016

Updated: 3/6/2019

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.4

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

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 5.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:X/RL:O/RC:C

Vulnerability Information

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

Patch Publication Date: 5/6/2016

Vulnerability Publication Date: 5/6/2016

Reference Information

CVE: CVE-2016-4553, CVE-2016-4554, CVE-2016-4555, CVE-2016-4556