Debian DLA-2467-2 : lxml regression update

medium Nessus Plugin ID 143308


The remote Debian host is missing a security update.


The fix for CVE-2020-27783, released as DLA 2467-1, was incomplete as the <math/svg> component was still affected by the vulnerability. This update includes an additional patch that completes the fix. Note that a package with version 3.7.1-1+deb9u2 was uploaded, but before the publication of the advisory a regression was discovered, which was immediately corrected prior to publication of this advisory.

For Debian 9 stretch, this problem has been fixed in version 3.7.1-1+deb9u3.

We recommend that you upgrade your lxml packages.

For the detailed security status of lxml please refer to its security tracker page at:

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.


Upgrade the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 143308

File Name: debian_DLA-2467.nasl

Version: 1.4

Type: local

Agent: unix

Published: 11/30/2020

Updated: 2/8/2024

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

Risk Information


Risk Factor: Low

Score: 3.8


Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.4

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

CVSS Score Source: CVE-2020-27783


Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.5

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:python-lxml, p-cpe:/a:debian:debian_linux:python-lxml-dbg, p-cpe:/a:debian:debian_linux:python-lxml-doc, p-cpe:/a:debian:debian_linux:python3-lxml, p-cpe:/a:debian:debian_linux:python3-lxml-dbg, cpe:/o:debian:debian_linux:9.0

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/18/2020

Vulnerability Publication Date: 12/3/2020

Reference Information

CVE: CVE-2020-27783