CVE-2021-27291
Published: 17 March 2021
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.
Notes
Author | Note |
---|---|
avital | eric looks to contain a vendored copy of pygments |
Priority
Status
Package | Release | Status |
---|---|---|
eric Launchpad, Ubuntu, Debian |
impish |
Ignored
(end of life)
|
kinetic |
Ignored
(end of life, was needed)
|
|
bionic |
Needs triage
|
|
focal |
Needs triage
|
|
groovy |
Ignored
(end of life)
|
|
hirsute |
Ignored
(end of life)
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Needs triage
|
|
jammy |
Needed
|
|
mantic |
Needed
|
|
lunar |
Ignored
(end of life, was needed)
|
|
pygments Launchpad, Ubuntu, Debian |
impish |
Released
(2.7.1+dfsg-2ubuntu1)
|
bionic |
Released
(2.2.0+dfsg-1ubuntu0.2)
|
|
focal |
Released
(2.3.1+dfsg-1ubuntu2.2)
|
|
groovy |
Released
(2.3.1+dfsg-4ubuntu0.2)
|
|
hirsute |
Released
(2.7.1+dfsg-2ubuntu1)
|
|
upstream |
Released
(2.7.4)
|
|
xenial |
Released
(2.1+dfsg-1ubuntu0.2)
|
|
trusty |
Released
(1.6+dfsg-1ubuntu1.1+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
jammy |
Released
(2.7.1+dfsg-2ubuntu1)
|
|
kinetic |
Released
(2.7.1+dfsg-2ubuntu1)
|
|
lunar |
Released
(2.7.1+dfsg-2ubuntu1)
|
|
mantic |
Released
(2.7.1+dfsg-2ubuntu1)
|
|
Patches: upstream: https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14 |
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 |