Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 20.10 : lxml vulnerability (USN-4666-2)

medium Nessus Plugin ID 144078
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VPR Score: 3

Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 20.10 host has packages installed that are affected by a vulnerability as referenced in the USN-4666-2 advisory.

- A XSS vulnerability was discovered in python-lxml's clean module. The module's parser didn't properly imitate browsers, which caused different behaviors between the sanitizer and the user's page. A remote attacker could exploit this flaw to run arbitrary HTML/JS code. (CVE-2020-27783)

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 python-lxml and / or python3-lxml packages.

See Also

https://ubuntu.com/security/notices/USN-4666-2

Plugin Details

Severity: Medium

ID: 144078

File Name: ubuntu_USN-4666-2.nasl

Version: 1.3

Type: local

Agent: unix

Published: 12/11/2020

Updated: 12/14/2020

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 3

CVSS Score Source: CVE-2020-27783

CVSS v2.0

Base Score: 4.3

Temporal Score: 3.2

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

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

CVSS v3.0

Base Score: 6.1

Temporal Score: 5.3

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

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

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, cpe:/o:canonical:ubuntu_linux:20.10, p-cpe:/a:canonical:ubuntu_linux:python-lxml, p-cpe:/a:canonical:ubuntu_linux:python3-lxml

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

Exploit Ease: No known exploits are available

Patch Publication Date: 12/11/2020

Vulnerability Publication Date: 12/3/2020

Reference Information

CVE: CVE-2020-27783

USN: 4666-2