PT-2021-21110 · Grok · Grok

Published 2021-07-01 · Updated 2021-07-06 · CVE-2021-36089

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Grok versions 7.6.6 through 9.2.0

Description: The issue is a heap-based buffer overflow in the grk::FileFormatDecompress::apply palette clr function, which is called from grk::FileFormatDecompress::applyColour.

Recommendations: For Grok versions 7.6.6 through 9.2.0, consider disabling the grk::FileFormatDecompress::apply palette clr function as a temporary workaround until a patch is available. Restrict access to the grk::FileFormatDecompress module to minimize the risk of exploitation.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-36089

Affected Products

Grok

References · 7

• 🔥 https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33544 · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-36089 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-36089 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-36089 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-36089 · Security Note
• https://github.com/GrokImageCompression/grok/releases · Note
• https://github.com/google/oss-fuzz-vulns/blob/main/vulns/grok/OSV-2021-677.yaml · Note