Squid 2.x < 4.12 / 5.x < 5.0.3 (SQUID-2020:5, SQUID-2020:6 & SQUID-2020:7)

medium Nessus Plugin ID 139912
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VPR Score: 5.9


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 4.12 or 5.x prior to 5.0.3. It is,therefore, affected by multiple vulnerabilities:
- Multiple denial of service (DoS) vulnerabilities exist in the SMP cache and TLS handshake implementations of Squid. An unauthenticated, remote attacker can exploit these issues, by sending specially crafted requests to an affected instance, to impose a DoS condition on the application (CVE-2020-14058, CVE-2020-14059).

- A cache poisoning vulnerability exists in Squid due to insufficient user input validation. An authenticated, remote attacker can exploit this issue, to affect the integrity of the contents returned to users from the cache (CVE-2020-15049).

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 4.12 or 5.0.3 or later.

See Also




Plugin Details

Severity: Medium

ID: 139912

File Name: squid_5_0_3.nasl

Version: 1.3

Type: remote

Family: Firewalls

Published: 8/27/2020

Updated: 1/4/2021

Dependencies: squid_version.nasl

Configuration: Enable paranoid mode

Risk Information

Risk Factor: Medium

VPR Score: 5.9

CVSS Score Source: CVE-2020-15049

CVSS v2.0

Base Score: 6.5

Temporal Score: 4.8

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

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

CVSS v3.0

Base Score: 8.8

Temporal Score: 7.7

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

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: 6/26/2020

Vulnerability Publication Date: 6/26/2020

Reference Information

CVE: CVE-2020-14058, CVE-2020-14059, CVE-2020-15049