CVE-2020-24978 Use after free in n/a
A double-free vulnerability in the NASM assembler's preprocessor allows attackers to execute arbitrary code or cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-24978?
CVE-2020-24978 is a critical use after free vulnerability in Nasm Netwide Assembler, published on 3 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In NASM 2.15.04rc3, there is a double-free vulnerability in pp_tokline asm/preproc.c. This is fixed in commit 8806c3ca007b84accac21dd88b900fb03614ceb7.
Weakness: CWE-415
Which versions are affected by CVE-2020-24978?
It affects 1 product.
Products include Nasm Netwide Assembler.
How do I fix CVE-2020-24978?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2020-24978 being exploited?
There is no known exploitation of CVE-2020-24978 in the wild and no public exploit code.
Other vulnerabilities in Nasm Netwide Assembler
Sources
Also known as DEBIAN-CVE-2020-24978, GHSA-4vwx-p2g9-hr37, UBUNTU-CVE-2020-24978.