CVE-2021-27291

Name
CVE-2021-27291
Description
In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and are vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service.
NVD Severity
medium
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
Exploit https://gist.github.com/b-c-ds/b1a2cc0c68a35c57188575eb496de5ce
Patch https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14
Mailing List https://lists.debian.org/debian-lts-announce/2021/03/msg00024.html
DEBIAN https://www.debian.org/security/2021/dsa-4878
DEBIAN https://www.debian.org/security/2021/dsa-4889
MLIST https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html
FEDORA https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WSLD67LFGXOX2K5YNESSWAS4AGZIJTUQ/
FEDORA https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GSJRFHALQ7E3UV4FFMFU2YQ6LUDHAI55/
MLIST https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:pygments:pygments:*:*:*:*:*:*:*:* pygments >= 1.1 < 2.7.4

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
py3-pygments 3.12-main 2.6.1-r1 Matt Smith <mcs@darkregion.net> fixed
py3-pygments 3.11-main 2.5.2-r1 Matt Smith <mcs@darkregion.net> fixed