Squid 2.x < 4.13 / 5.x < 5.0.4 (SQUID-2020:8 and SQUID-2020:10)

medium Nessus Plugin ID 139923
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VPR Score: 4.4


The remote proxy server is affected by multiple vulnerabilities


According to its banner, the version of Squid running on the remote host is 2.x prior to 4.13 or 5.x prior to 5.0.4. It is,therefore, affected by multiple vulnerabilities:

- An input-validation flaw exists related to handling HTTP and HTTPS traffic that allows HTTP request splitting leading to cache poisoning. (CVE-2020-15810)

- An input-validation flaw exists related to handling HTTP and HTTPS traffic that allows HTTP request smuggling leading to cache poisoning. (CVE-2020-15811)

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


Upgrade to Squid version 4.13 or 5.0.4 or later.

See Also



Plugin Details

Severity: Medium

ID: 139923

File Name: squid_5_0_4.nasl

Version: 1.3

Type: remote

Family: Firewalls

Published: 8/28/2020

Updated: 9/11/2020

Dependencies: squid_version.nasl

Configuration: Enable paranoid mode

Risk Information

Risk Factor: Medium

VPR Score: 4.4

CVSS Score Source: CVE-2020-15811

CVSS v2.0

Base Score: 4

Temporal Score: 3

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

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

CVSS v3.0

Base Score: 6.5

Temporal Score: 5.7

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

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

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

Required KB Items: installed_sw/Squid, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 8/22/2020

Vulnerability Publication Date: 8/22/2020

Reference Information

CVE: CVE-2020-15810, CVE-2020-15811

IAVB: 2020-B-0050