CVE-2021-36089
HIGHCVSS 7.8/10EPSS 1.18%
Last modified
CVE-2021-36089 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Grok 7.6.6 through 9.2.0 has a heap-based buffer overflow in grk::FileFormatDecompress::apply_palette_clr (called from grk::FileFormatDecompress::applyColour).. EPSS estimates a 1.18% chance of exploitation in the next 30 days.
Description
Grok 7.6.6 through 9.2.0 has a heap-based buffer overflow in grk::FileFormatDecompress::apply_palette_clr (called from grk::FileFormatDecompress::applyColour).
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Zope | Grok | >= 7.6.6, <= 9.2.0 |
References
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33544Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/GrokImageCompression/grok/releasesRelease Notes, Third Party Advisory
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/grok/OSV-2021-677.yamlThird Party Advisory
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33544Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/GrokImageCompression/grok/releasesRelease Notes, Third Party Advisory
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/grok/OSV-2021-677.yamlThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-36089?
Grok 7.6.6 through 9.2.0 has a heap-based buffer overflow in grk::FileFormatDecompress::apply_palette_clr (called from grk::FileFormatDecompress::applyColour).
How severe is CVE-2021-36089?
CVE-2021-36089 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.18% probability of exploitation in the next 30 days.
How do I fix CVE-2021-36089?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-36083KDE KImageFormats 5.70.0 through 5.81.0 has a stack-based bu…5.5
- CVE-2021-36084The CIL compiler in SELinux 3.2 has a use-after-free in __ci…3.3
- CVE-2021-36085The CIL compiler in SELinux 3.2 has a use-after-free in __ci…3.3
- CVE-2021-36086The CIL compiler in SELinux 3.2 has a use-after-free in cil_…3.3
- CVE-2021-36087The CIL compiler in SELinux 3.2 has a heap-based buffer over…3.3
- CVE-2021-36088Fluent Bit (aka fluent-bit) 1.7.0 through 1.7.4 has a double…9.8
- CVE-2021-3609.A flaw was found in the CAN BCM networking protocol in the …7
- CVE-2021-36090When reading a specially crafted ZIP archive, Compress can b…7.5
- CVE-2021-36091Agents are able to list appointments in the calendars withou…4.3
- CVE-2021-36092It's possible to create an email which contains specially cr…6.1
- CVE-2021-36093It's possible to create an email which can be stuck while be…5.3
- CVE-2021-36094It's possible to craft a request for appointment edit screen…5.4
Are you affected by CVE-2021-36089?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST