PT-2021-21307 · Libjxl+1 · Libjxl+1

Aug5T7O · Published 2021-08-30 · Updated 2021-09-08 · CVE-2021-36691

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions libjxl version v0.5.0

Description The issue is related to a problem of assertion failure in the lib/jxl/image.cc file, specifically in the jxl::PlaneBase::PlaneBase() function. When encoding a malicious GIF file using cjxl, an attacker can trigger a denial of service.

Recommendations For libjxl version v0.5.0, consider avoiding the use of the jxl::PlaneBase::PlaneBase() function when encoding GIF files until a patch is available. As a temporary workaround, restrict the use of cjxl for encoding GIF files to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Assertion Failure

Weakness Enumeration

CWE-617

Related Identifiers

CVE-2021-36691

ECHO-07BD-5728-1AD8

Affected Products

Debian

Libjxl

References · 10

• 🔥 https://github.com/libjxl/libjxl/issues/422 · Exploit
• https://ubuntu.com/security/CVE-2021-36691 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-36691 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-36691 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-36691 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-36691 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-36691 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-36691 · Security Note
• https://t.me/cvenotify/20389 · Telegram Post
• https://t.me/cibsecurity/28052 · Telegram Post