CVE-2020-28493

Name	CVE-2020-28493
Description	This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDoS vulnerability is mainly due to the `_punctuation_re regex` operator and its use of multiple wildcards. The last wildcard is the most exploitable as it searches for trailing punctuation. This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	982736

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
jinja2 (PTS)	bullseye	2.11.3-1	fixed
	bookworm	3.1.2-1	fixed
	sid, trixie	3.1.3-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
jinja2	source	(unstable)	2.11.3-1			982736

Notes

[buster] - jinja2 <no-dsa> (Minor issue)
[stretch] - jinja2 <no-dsa> (Minor issue)
https://github.com/pallets/jinja/pull/1343
https://snyk.io/vuln/SNYK-PYTHON-JINJA2-1012994