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Debian DLA-1858-1 : squid3 security update

critical Nessus Plugin ID 126835

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Synopsis

The remote Debian host is missing a security update.

Description

Squid, a high-performance proxy caching server for web clients, has been found vulnerable to denial of service attacks associated with HTTP authentication header processing.

CVE-2019-12525

Due to incorrect buffer management Squid is vulnerable to a denial of service attack when processing HTTP Digest Authentication credentials.

Due to incorrect input validation the HTTP Request header parser for Digest authentication may access memory outside the allocated memory buffer.

On systems with memory access protections this can result in the Squid process being terminated unexpectedly. Resulting in a denial of service for all clients using the proxy.

CVE-2019-12529

Due to incorrect buffer management Squid is vulnerable to a denial of service attack when processing HTTP Basic Authentication credentials.

Due to incorrect string termination the Basic authentication credentials decoder may access memory outside the decode buffer.

On systems with memory access protections this can result in the Squid process being terminated unexpectedly. Resulting in a denial of service for all clients using the proxy.

For Debian 8 'Jessie', these problems have been fixed in version 3.4.8-6+deb8u8.

We recommend that you upgrade your squid3 packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected packages.

See Also

https://lists.debian.org/debian-lts-announce/2019/07/msg00018.html

https://packages.debian.org/source/jessie/squid3

Plugin Details

Severity: Critical

ID: 126835

File Name: debian_DLA-1858.nasl

Version: 1.5

Type: local

Agent: unix

Published: 7/22/2019

Updated: 5/9/2024

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2019-12525

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:squid-cgi, p-cpe:/a:debian:debian_linux:squid3-common, p-cpe:/a:debian:debian_linux:squid-purge, p-cpe:/a:debian:debian_linux:squid3-dbg, p-cpe:/a:debian:debian_linux:squid3, cpe:/o:debian:debian_linux:8.0, p-cpe:/a:debian:debian_linux:squidclient

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 7/20/2019

Vulnerability Publication Date: 7/11/2019

Reference Information

CVE: CVE-2019-12525, CVE-2019-12529