CVE-2020-6817

EUVD-2020-0056
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']}).
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA-ADPADP
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 68%
Affected Products (NVD)
VendorProductVersion
mozillableach
𝑥
< 3.1.4
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
python-bleach
bookworm
5.0.1-2
fixed
bullseye
3.2.1-2.1
fixed
buster
no-dsa
sid
6.2.0-1
fixed
stretch
no-dsa
trixie
6.2.0-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
python-bleach
bionic
needed
eoan
ignored
focal
needed
groovy
not-affected
hirsute
not-affected
impish
not-affected
jammy
not-affected
kinetic
not-affected
lunar
not-affected
mantic
not-affected
noble
not-affected
trusty
dne
xenial
needed
Common Weakness Enumeration
References
https://bugzilla.mozilla.org/show_bug.cgi?id=1623633
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/security/advisories/GHSA-vqhp-cxgc-6wmm