CVE-2020-6817
Published: 16 February 2023
bleach.clean behavior parsing style attributes could result in a regular expression denial of service (ReDoS). Calls to bleach.clean with an allowed tag with an allowed style attribute are vulnerable to ReDoS. For example, bleach.clean(..., attributes={'a': ['style']}).
Priority
Status
Package | Release | Status |
---|---|---|
python-bleach Launchpad, Ubuntu, Debian |
bionic |
Needed
|
eoan |
Ignored
(end of life)
|
|
focal |
Needed
|
|
groovy |
Not vulnerable
(3.1.4-1)
|
|
hirsute |
Not vulnerable
(3.1.4-1)
|
|
impish |
Not vulnerable
(3.1.4-1)
|
|
jammy |
Not vulnerable
(3.1.4-1)
|
|
kinetic |
Not vulnerable
(3.1.4-1)
|
|
lunar |
Not vulnerable
(3.1.4-1)
|
|
mantic |
Not vulnerable
(3.1.4-1)
|
|
noble |
Not vulnerable
(3.1.4-1)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(3.1.4-1)
|
|
xenial |
Needed
|
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 |
References
- https://github.com/mozilla/bleach/security/advisories/GHSA-vqhp-cxgc-6wmm
- https://bugzilla.mozilla.org/show_bug.cgi?id=1623633
- https://github.com/mozilla/bleach/commit/d6018f2539d271963c3e7f54f36ef11900363c69
- https://github.com/mozilla/bleach/commit/6e74a5027b57055cdaeb040343d32934121392a7
- https://www.cve.org/CVERecord?id=CVE-2020-6817
- NVD
- Launchpad
- Debian