CVE-2021-40648 Memory corruption in n/a
A memory corruption vulnerability in man2html allows attackers to corrupt heap metadata, potentially leading to arbitrary code execution or denial of service.
- 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
- None listed
What is CVE-2021-40648?
CVE-2021-40648 is a medium-severity memory corruption vulnerability in n/a, published on 9 Sep 2022. 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
In man2html 1.6g, a filename can be created to overwrite the previous size parameter of the next chunk and the fd, bk, fd_nextsize, bk_nextsize of the current chunk. The next chunk is then freed later on, causing a freeing of an arbitrary amount of memory.
Weakness: CWE-20
Which versions are affected by CVE-2021-40648?
It affects 1 product.
Products include Man2html Project Man2html.
How do I fix CVE-2021-40648?
No fix has been published for CVE-2021-40648 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-40648 being exploited?
There is no known exploitation of CVE-2021-40648 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2021-40648, GHSA-x62g-3vp2-7m3v, UBUNTU-CVE-2021-40648.