CVE-2021-20270
Published: 9 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
Status
Package | Release | Status |
---|---|---|
pygments Launchpad, Ubuntu, Debian |
impish |
Released
(2.7.1+dfsg-2)
|
trusty |
Released
(1.6+dfsg-1ubuntu1.1+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
bionic |
Released
(2.2.0+dfsg-1ubuntu0.1)
|
|
focal |
Released
(2.3.1+dfsg-1ubuntu2.1)
|
|
groovy |
Released
(2.3.1+dfsg-4ubuntu0.1)
|
|
hirsute |
Released
(2.7.1+dfsg-2)
|
|
xenial |
Released
(2.1+dfsg-1ubuntu0.1)
|
|
upstream |
Released
(2.7.4)
|
|
jammy |
Released
(2.7.1+dfsg-2)
|
|
kinetic |
Released
(2.7.1+dfsg-2)
|
|
lunar |
Released
(2.7.1+dfsg-2)
|
|
Patches: upstream: https://github.com/pygments/pygments/commit/f91804ff4772e3ab41f46e28d370f57898700333 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |