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Ubuntu 16.04 ESM / 18.04 ESM / 20.04 ESM : Lynx vulnerabilities (USN-4800-1)

high Nessus Plugin ID 183113

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Synopsis

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

Description

The remote Ubuntu 16.04 ESM / 18.04 ESM / 20.04 ESM host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4800-1 advisory.

 - lynx: It was found that Lynx doesn't parse the authority component of the URL correctly when the host name part ends with '?', and could instead be tricked into connecting to a different host. (CVE-2016-9179)

 - Lynx before 2.8.9dev.16 is vulnerable to a use after free in the HTML parser resulting in memory disclosure, because HTML_put_string() can append a chunk onto itself. (CVE-2017-1000211)

 - Lynx through 2.8.9 mishandles the userinfo subcomponent of a URI, which allows remote attackers to discover cleartext credentials because they may appear in SNI data. (CVE-2021-38165)

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

Solution

Update the affected lynx, lynx-common and / or lynx-cur packages.

See Also

https://ubuntu.com/security/notices/USN-4800-1

Plugin Details

Severity: High

ID: 183113

File Name: ubuntu_USN-4800-1.nasl

Version: 1.0

Type: local

Agent: unix

Published: 10/16/2023

Updated: 10/16/2023

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: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2017-1000211

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:H/A:N

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

CVSS Score Source: CVE-2016-9179

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:16.04:-:esm, cpe:/o:canonical:ubuntu_linux:18.04:-:esm, cpe:/o:canonical:ubuntu_linux:20.04:-:esm, p-cpe:/a:canonical:ubuntu_linux:lynx, p-cpe:/a:canonical:ubuntu_linux:lynx-common, p-cpe:/a:canonical:ubuntu_linux:lynx-cur

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

Exploit Ease: No known exploits are available

Patch Publication Date: 3/15/2021

Vulnerability Publication Date: 11/4/2016

Reference Information

CVE: CVE-2016-9179, CVE-2017-1000211, CVE-2021-38165

USN: 4800-1