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.
Priority
Medium
CVSS 3 base score: 7.5
Status
| Package | Release | Status |
|---|---|---|
|
eric Launchpad, Ubuntu, Debian |
Upstream |
Needs triage
|
| Ubuntu 21.10 (Impish Indri) |
Needed
|
|
| Ubuntu 21.04 (Hirsute Hippo) |
Needed
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Needs triage
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Needs triage
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Ignored
(end of standard support, was needs-triage)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
pygments Launchpad, Ubuntu, Debian |
Upstream |
Released
(2.7.4)
|
| Ubuntu 21.10 (Impish Indri) |
Released
(2.7.1+dfsg-2ubuntu1)
|
|
| Ubuntu 21.04 (Hirsute Hippo) |
Released
(2.7.1+dfsg-2ubuntu1)
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Released
(2.3.1+dfsg-1ubuntu2.2)
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(2.2.0+dfsg-1ubuntu0.2)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Released
(2.1+dfsg-1ubuntu0.2)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Needed
|
|
|
Patches: Upstream: https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14 |
||
Notes
| Author | Note |
|---|---|
| avital | eric looks to contain a vendored copy of pygments |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27291
- https://gist.github.com/b-c-ds/b1a2cc0c68a35c57188575eb496de5ce
- https://ubuntu.com/security/notices/USN-4897-1
- NVD
- Launchpad
- Debian