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 |