Out-of-bounds Read in Upx
CVE-2019-20021
A heap-based buffer over-read was discovered in canUnpack in p_mach.cpp in UPX 3.95 via a crafted Mach-O file.
Vulnerability class: Buffer Overflow
EPSS: 0.011 (61.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
Affected products
- Upx — versions 3.95
- Fedoraproject Fedora — versions 30, 31
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- cve@mitre.org (x_refsource_FEDORA, vendor-advisory)
- cve@mitre.org (vendor-advisory, Broken Link, x_refsource_SUSE)
- cve@mitre.org (vendor-advisory, Broken Link, x_refsource_SUSE)
- cve@mitre.org (x_refsource_FEDORA, vendor-advisory)
Frequently asked questions
- What is CVE-2019-20021?
- CVE-2019-20021 is a medium-severity vulnerability in Upx, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2019-12-27.
- How severe is CVE-2019-20021?
- Medium severity. CVSS v3 base score is 5.5 out of 10.