PT-2019-10260 · Sass+2 · Libsass+2

Hongxuchen · Published 2019-04-23 · Updated 2023-02-28 · CVE-2018-20821

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: LibSass versions 3.5.5 and earlier

Description: The parsing component in LibSass allows attackers to cause a denial-of-service due to uncontrolled recursion in Sass::Parser::parse css variable value in parser.cpp.

Recommendations: For LibSass versions 3.5.5 and earlier, consider updating to a version later than 3.5.5 to resolve the issue. As a temporary workaround, consider restricting the input to the parse css variable value function to minimize the risk of uncontrolled recursion.

Exploit

Fix

DoS

Uncontrolled Recursion

Weakness Enumeration

CWE-674

Related Identifiers

ALT-PU-2020-1653

CVE-2018-20821

MGASA-2020-0049

OPENSUSE-SU-2019:1791-1

OPENSUSE-SU-2019:1800-1

OPENSUSE-SU-2019:1883-1

OPENSUSE-SU-2019_1791-1

OPENSUSE-SU-2024:10988-1

Affected Products

Alt Linux

Libsass

Suse

References · 46

• 🔥 https://github.com/sass/libsass/issues/2658 · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-20821 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2018-20821 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2019:1883-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2018-20821 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2019:1800-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-20821 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2020-0049.html · Security Note
• http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00027.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-20821 · Security Note
• http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00047.html · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2020-0049 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-20821 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-20821 · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00051.html · Vendor Advisory