Buffer overflow in Upx
CVE-2023-23456
A heap-based buffer overflow issue was discovered in UPX in PackTmt::pack() in p_tmt.cpp file. The flow allows an attacker to cause a denial of service (abort) via a crafted file.
Vulnerability class: Buffer Overflow
EPSS: 0.004 (31.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L.
Affected products
- Upx
- Fedoraproject Fedora — versions 36, 37
Weakness classification (CWE)
Public proof-of-concept exploits
References
- patrick@puiterwijk.org (Third Party Advisory, Issue Tracking)
- patrick@puiterwijk.org (Patch, Third Party Advisory)
- patrick@puiterwijk.org (Exploit, Third Party Advisory)
- patrick@puiterwijk.org (vendor-advisory)
- patrick@puiterwijk.org (vendor-advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2023-23456?
- CVE-2023-23456 is a medium-severity vulnerability in Upx, classified under Out-of-bounds Write. CVSS score: 5.3/10. Published 2023-01-12.
- How severe is CVE-2023-23456?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2023-23456 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.