Vulnerability · Published Aug 25, 2022 · Assigned by redhat
CVE-2020-27798
Medium 5.5
In plain English
A medium-severity memory corruption in upx. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.3%top 78.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
An invalid memory address reference was discovered in the adjABS function in p_lx_elf.cpp in UPX 4.0.0 via a crafted Mach-O file.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | upx | 4.0.0-r0 | ALPINE-CVE-2020-27798 |
| Alpine:v3.21 | upx | 4.0.0-r0 | ALPINE-CVE-2020-27798 |
| Alpine:v3.22 | upx | 4.0.0-r0 | ALPINE-CVE-2020-27798 |
| Alpine:v3.23 | upx | 4.0.0-r0 | ALPINE-CVE-2020-27798 |
| Alpine:v3.24 | upx | 4.0.0-r0 | ALPINE-CVE-2020-27798 |
| Debian:13 | upx-ucl | 4.2.2-1 | DEBIAN-CVE-2020-27798 |
| Debian:14 | upx-ucl | 4.2.2-1 | DEBIAN-CVE-2020-27798 |
| Ubuntu:22.04:LTS | upx-ucl | no fix listed | UBUNTU-CVE-2020-27798 |
| Ubuntu:24.04:LTS | upx-ucl | no fix listed | UBUNTU-CVE-2020-27798 |
| Ubuntu:25.10 | upx-ucl | no fix listed | UBUNTU-CVE-2020-27798 |
| Ubuntu:26.04:LTS | upx-ucl | no fix listed | UBUNTU-CVE-2020-27798 |
| Ubuntu:26.10 | upx-ucl | no fix listed | UBUNTU-CVE-2020-27798 |
Affected products (as reported)
Weakness: CWE-119
References
- https://github.com/upx/upx/issues/396 x_refsource_MISC