Squid < 3.0.STABLE23 / 3.1.0.16

Medium Nessus Plugin ID 44384

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VPR Score: 4.4

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 2.x or older than 3.0.STABLE23 / 3.1.0.16. Such versions reportedly fail to correctly validate DNS packets, which can be abused by a remote attack to cause a short-term denial of service.

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

Solution

Either upgrade to Squid version 3.0.STABLE23 / 3.1.0.16 or later or apply the appropriate patch referenced in the project's advisory above.

See Also

http://www.squid-cache.org/Advisories/SQUID-2010_1.txt

http://www.nessus.org/u?9140f7e2

http://www.nessus.org/u?1e06892d

http://www.squid-cache.org/Versions/v2/HEAD/changesets/12597.patch

Plugin Details

Severity: Medium

ID: 44384

File Name: squid_3_0_23.nasl

Version: 1.16

Type: remote

Family: Firewalls

Published: 2010/02/02

Updated: 2018/09/17

Dependencies: 49692

Configuration: Enable paranoid mode

Risk Information

Risk Factor: Medium

VPR Score: 4.4

CVSS Score Source: CVE-2010-0308

CVSS Score Rationale: The squid-2010_1 advisory mentions that any external server who can determine the squid receiving port can perform the attack, so authentication is set to none.

CVSS v2.0

Base Score: 5

Temporal Score: 3.7

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

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

Vulnerability Information

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

Required KB Items: www/squid, Settings/ParanoidReport

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2010/02/01

Vulnerability Publication Date: 2010/01/29

Reference Information

CVE: CVE-2010-0308

BID: 37522

Secunia: 38451, 38455

CWE: 20