CVE-2021-20270

Published: 09 March 2021

An infinite loop in SMLLexer in Pygments versions 1.5 to 2.7.3 may lead to denial of service when performing syntax highlighting of a Standard ML (SML) source file, as demonstrated by input that only contains the "exception" keyword.

Priority

Medium

CVSS 3 base score: 7.5

Status

Package Release Status
pygments
Launchpad, Ubuntu, Debian
Upstream Pending
(2.7.4)
Ubuntu 21.04 (Hirsute Hippo)
Released (2.7.1+dfsg-2)
Ubuntu 20.10 (Groovy Gorilla)
Released (2.3.1+dfsg-4ubuntu0.1)
Ubuntu 20.04 LTS (Focal Fossa)
Released (2.3.1+dfsg-1ubuntu2.1)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (2.2.0+dfsg-1ubuntu0.1)
Ubuntu 16.04 LTS (Xenial Xerus)
Released (2.1+dfsg-1ubuntu0.1)
Ubuntu 14.04 ESM (Trusty Tahr) Needs triage

Patches:
Upstream: https://github.com/pygments/pygments/commit/f91804ff4772e3ab41f46e28d370f57898700333