Debian Long Term Support / LTS Security Information / 2020 / Security Information -- DLA-2167-1 python-bleach

Debian Security Advisory

DLA-2167-1 python-bleach -- LTS security update

Date Reported:

01 Apr 2020

Affected Packages:

python-bleach

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 955388.
In Mitre's CVE dictionary: CVE-2020-6817.

More information:

A vulnerability was discovered in python-bleach, a whitelist-based HTML-sanitizing library. Calls to bleach.clean with an allowed tag with an allowed style attribute are vulnerable to a regular expression denial of service (ReDoS).

For Debian 8 Jessie, this problem has been fixed in version 1.4-1+deb8u1.

We recommend that you upgrade your python-bleach packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS