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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.011 (64.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: +0.000
Affected products
- Upx — versions 3.95
- Fedoraproject Fedora — versions 30, 31
Weakness classification (CWE)
References
- github.com/upx/upx/issues/315 (Exploit, Third Party Advisory, Issue Tracking)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2020-02/msg00003.html (vendor-advisory, Broken Link)
- lists.opensuse.org/opensuse-security-announce/2020-02/msg00007.html (vendor-advisory, Broken Link)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (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.