PT-2021-6714 · Libsixel+1 · Libsixel+1

Hongxuchen · Published 2020-09-30 · Updated 2024-12-20 · CVE-2020-21050

Positive Technologies (AI Summary)

CVSS v2.0

7.1

High

Base vector

AV:N/AC:M/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Libsixel versions prior to 1.8.3

Description The issue is related to a stack buffer overflow in the gif process raster function at fromgif.c, which can be exploited by a remote attacker to cause a denial of service.

Recommendations For versions prior to 1.8.3, update to version 1.8.3 or later to resolve the issue. As a temporary workaround, consider disabling the gif process raster function until a patch is available.

Exploit

Fix

Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-119

CWE-787

Related Identifiers

ALT-PU-2020-2902

ALT-PU-2024-17256

BDU:2022-02076

CVE-2020-21050

Affected Products

Alt Linux

Libsixel

References · 17

• 🔥 https://github.com/saitoha/libsixel/issues/75 · Exploit
• https://github.com/saitoha/libsixel/commit/7808a06b88c11dbc502318cdd51fa374f8cd47ee · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-21050 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-21050 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-21050 · Security Note
• https://bdu.fstec.ru/vul/2022-02076 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2020-21050 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2020-21050 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-21050 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-21050 · Vendor Advisory
• https://github.com/saitoha/libsixel/blob/master/ChangeLog · Note
• https://github.com/saitoha/libsixel/releases/tag/v1.8.5 · Note
• https://github.com/saitoha/libsixel/commit/088700788329173ae71b12ecea0cf1274b82ae1a · Note
• https://t.me/cibsecurity/28828 · Telegram Post
• https://t.me/cvenotify/32855 · Telegram Post