CVE-2020-27802 Denial of service in upx
A crafted Mach-O file causes a floating point exception in UPX, leading to a denial of service when processed.
- 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-2020-27802?
CVE-2020-27802 is a medium-severity denial of service 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
An floating point exception was discovered in the elf_lookup function in p_lx_elf.cpp in UPX 4.0.0 via a crafted Mach-O file.
Which versions are affected by CVE-2020-27802?
It affects 1 product.
Products include Upx Upx.
How do I fix CVE-2020-27802?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-27802 being exploited?
There is no known exploitation of CVE-2020-27802 in the wild and no public exploit code.
Other vulnerabilities in upx
Sources
Also known as DEBIAN-CVE-2020-27802, GHSA-jx23-r23x-qc23, UBUNTU-CVE-2020-27802.