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CVE-2018-20821

Published: 23 April 2019

The parsing component in LibSass through 3.5.5 allows attackers to cause a denial-of-service (uncontrolled recursion in Sass::Parser::parse_css_variable_value in parser.cpp).

Priority

Medium

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
libsass
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code not present)
cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Needed

groovy Ignored
(end of life)
hirsute Ignored
(end of life)
impish Ignored
(end of life)
jammy Needed

kinetic Ignored
(end of life, was needed)
lunar Ignored
(end of life, was needed)
mantic Needed

trusty Does not exist

upstream Needs triage

xenial Not vulnerable
(code not present)
Patches:
upstream: https://github.com/sass/libsass/commit/c9987a4206ee444bc09a3be7a690a506dfc37636

Severity score breakdown

Parameter Value
Base score 6.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H