CVE-2020-27788 Denial of service in upx
An attacker can cause a denial of service in UPX by providing a crafted input file that triggers an out-of-bounds read.
- 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-2020-27788?
CVE-2020-27788 is a medium-severity denial of service vulnerability in upx, published on 18 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 out-of-bounds read access vulnerability was discovered in UPX in PackLinuxElf64::canPack() function of p_lx_elf.cpp file. An attacker with a crafted input file could trigger this issue that could cause a crash leading to a denial of service.
Weakness: CWE-125
Which versions are affected by CVE-2020-27788?
It affects 1 product.
Products include Upx Upx.
How do I fix CVE-2020-27788?
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-2020-27788 being exploited?
There is no known exploitation of CVE-2020-27788 in the wild and no public exploit code.
Other vulnerabilities in upx
Sources
Also known as DEBIAN-CVE-2020-27788, GHSA-fmj5-4m95-44jw, UBUNTU-CVE-2020-27788.