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)
|
|
| 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