CVE-2021-36089 Memory corruption in n/a
A heap-based buffer overflow in the Grok library allows attackers to execute arbitrary code or cause denial of service via crafted files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-36089?
CVE-2021-36089 is a high-severity memory corruption vulnerability in n/a, published on 1 Jul 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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).
Weakness: CWE-787
Which versions are affected by CVE-2021-36089?
It affects 1 product.
Products include Zope Grok.
How do I fix CVE-2021-36089?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-36089 being exploited?
There is no known exploitation of CVE-2021-36089 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2021-36089, GHSA-j6x3-x857-7j5x.