FreeBSD : squid -- Vulnerable to Denial of Service attack (d5b6d151-1887-11e8-94f7-9c5c8e75236a)

high Nessus Plugin ID 106995

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

Louis Dion-Marcil reports :

Due to incorrect pointer handling Squid is vulnerable to denial of service attack when processing ESI responses.

This problem allows a remote server delivering certain ESI response syntax to trigger a denial of service for all clients accessing the Squid service.

Due to unrelated changes Squid-3.5 has become vulnerable to some regular ESI server responses also triggering this issue.

This problem is limited to the Squid custom ESI parser. Squid built to use libxml2 or libexpat XML parsers do not have this problem.

Due to incorrect pointer handling Squid is vulnerable to denial of service attack when processing ESI responses or downloading intermediate CA certificates.

This problem allows a remote client delivering certain HTTP requests in conjunction with certain trusted server responses to trigger a denial of service for all clients accessing the Squid service.

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 106995

File Name: freebsd_pkg_d5b6d151188711e894f79c5c8e75236a.nasl

Version: 3.5

Type: local

Family: FreeBSD Local Security Checks

Published: 2/26/2018

Updated: 10/27/2025

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

CVSS Score Source: CVE-2018-1000027

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:squid-devel, p-cpe:/a:freebsd:freebsd:squid

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 2/23/2018

Vulnerability Publication Date: 12/13/2017

Reference Information

CVE: CVE-2018-1000024, CVE-2018-1000027

DSA: 4122

Detections

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