CVE-2020-21687 Memory corruption in n/a
Remote attackers can cause a denial of service in the NASM assembler by providing a crafted assembly file that triggers a buffer overflow.
- 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-2020-21687?
CVE-2020-21687 is a medium-severity memory corruption vulnerability in Nasm Netwide Assembler, published on 22 Aug 2023. 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
Buffer Overflow vulnerability in scan function in stdscan.c in nasm 2.15rc0 allows remote attackers to cause a denial of service via crafted asm file.
Weakness: CWE-787
Which versions are affected by CVE-2020-21687?
It affects 1 product.
Products include Nasm Netwide Assembler.
How do I fix CVE-2020-21687?
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-2020-21687 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-21687 exists.
Other vulnerabilities in Nasm Netwide Assembler
Sources
Also known as DEBIAN-CVE-2020-21687, GHSA-mrj6-gwrp-fxf5.