CVE-2020-27796 Memory corruption in upx
A heap-based buffer over-read in UPX allows attackers to cause a denial of service via a crafted Mach-O file.
- 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-2020-27796?
CVE-2020-27796 is a high-severity memory corruption vulnerability in upx, published on 25 Aug 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
A heap-based buffer over-read was discovered in the invert_pt_dynamic function in p_lx_elf.cpp in UPX 4.0.0 via a crafted Mach-O file.
Which versions are affected by CVE-2020-27796?
It affects 1 product.
Products include Upx Upx.
How do I fix CVE-2020-27796?
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-2020-27796 being exploited?
There is no known exploitation of CVE-2020-27796 in the wild and no public exploit code.
Other vulnerabilities in upx
Sources
Also known as DEBIAN-CVE-2020-27796, GHSA-242r-jf27-g6pp, UBUNTU-CVE-2020-27796.