7.5

CVE-2021-27291

Exploit
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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Pygments ≫ Pygments Version >= 1.1 < 2.7.4
Debian ≫ Debian Linux Version9.0
Debian ≫ Debian Linux Version10.0
Fedoraproject ≫ Fedora Version32
Fedoraproject ≫ Fedora Version33
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 3.83% 0.887
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd@nist.gov 5 10 2.9
AV:N/AC:L/Au:N/C:N/I:N/A:P
CWE-1333 Inefficient Regular Expression Complexity

The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.

https://gist.github.com/b-c-ds/b1a2cc0c68a35c57188575eb496de5ce
Third Party Advisory
Exploit
https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14
Patch
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/03/msg00024.html
Third Party Advisory
Mailing List
https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html
Third Party Advisory
Mailing List
https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html
Third Party Advisory
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GSJRFHALQ7E3UV4FFMFU2YQ6LUDHAI55/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WSLD67LFGXOX2K5YNESSWAS4AGZIJTUQ/
https://www.debian.org/security/2021/dsa-4878
Third Party Advisory
https://www.debian.org/security/2021/dsa-4889
Third Party Advisory