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Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : Privoxy vulnerabilities (USN-4886-1)

high Nessus Plugin ID 147971

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 20.10 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4886-1 advisory.

 - A flaw was found in privoxy before 3.0.32. An assertion failure could be triggered with a crafted CGI request leading to server crash. (CVE-2021-20272)

 - A flaw was found in privoxy before 3.0.32. A crash can occur via a crafted CGI request if Privoxy is toggled off. (CVE-2021-20273)

 - A flaw was found in privoxy before 3.0.32. A invalid read of size two may occur in chunked_body_is_complete() leading to denial of service. (CVE-2021-20275)

 - A flaw was found in privoxy before 3.0.32. Invalid memory access with an invalid pattern passed to pcre_compile() may lead to denial of service. (CVE-2021-20276)

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

Solution

Update the affected privoxy package.

See Also

https://ubuntu.com/security/notices/USN-4886-1

Plugin Details

Severity: High

ID: 147971

File Name: ubuntu_USN-4886-1.nasl

Version: 1.6

Type: local

Agent: unix

Published: 3/23/2021

Updated: 1/8/2024

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2021-20217

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

CVSS Score Source: CVE-2021-20276

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:privoxy

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

Exploit Ease: No known exploits are available

Patch Publication Date: 3/22/2021

Vulnerability Publication Date: 3/9/2021

Reference Information

CVE: CVE-2020-35502, CVE-2021-20209, CVE-2021-20210, CVE-2021-20211, CVE-2021-20212, CVE-2021-20213, CVE-2021-20214, CVE-2021-20215, CVE-2021-20216, CVE-2021-20217, CVE-2021-20272, CVE-2021-20273, CVE-2021-20275, CVE-2021-20276

USN: 4886-1