PT-2021-6712 · Libsixel+1 · Libsixel+1

Hongxuchen · Published 2020-09-30 · Updated 2024-12-20 · CVE-2020-21048

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 1.8.4

Description The issue in the dither.c component of libsixel allows attackers to cause a denial of service via a crafted PNG file. This is related to errors in resource release. Exploitation of the issue enables a remote attacker to cause a denial of service using a specially crafted PNG file.

Recommendations For versions prior to 1.8.4, update to version 1.8.4 or later to resolve the issue. As a temporary workaround, consider restricting the processing of PNG files from untrusted sources until the update is applied.

Exploit

Fix

Improper Resource Release

Weakness Enumeration

CWE-404

Related Identifiers

ALT-PU-2020-2902

ALT-PU-2024-17256

BDU:2022-02074

CVE-2020-21048

Affected Products

Alt Linux

Libsixel

References · 15

• 🔥 https://github.com/saitoha/libsixel/issues/73 · Exploit
• https://github.com/saitoha/libsixel/commit/cb373ab6614c910407c5e5a93ab935144e62b037 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2020-21048 · Security Note
• https://cve.org/CVERecord?id=CVE-2020-21048 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-21048 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-21048 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-21048 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-21048 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-21048 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-02074 · Security Note
• https://github.com/saitoha/libsixel/releases/tag/v1.8.4 · Note
• https://github.com/saitoha/libsixel/blob/master/ChangeLog · Note
• https://github.com/saitoha/libsixel/commit/26ac06f3623279348f0dce2d191a9b6ca0c80226 · Note
• https://t.me/cibsecurity/28830 · Telegram Post
• https://bitbucket.org/netbsd/pkgsrc/commits/6f0c011cbfccdffa635d04c84433b1a02687adad · Note