Improper input validation in Upx
CVE-2021-30501
An assertion abort was found in upx MemBuffer::alloc() in mem.cpp, in version UPX 4.0.0. The flow allows attackers to cause a denial of service (abort) via a crafted file.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
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: 0.010 (62.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Upx — versions 4.0.0
- Fedoraproject Fedora — versions 33
- Red Hat Enterprise Linux — versions 7.0
- Upx — versions upx 4.0
Weakness classification (CWE)
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- github.com/upx/upx/issues/486 (Exploit, Third Party Advisory, Issue Tracking)
- github.com/upx/upx/pull/487 (Exploit, Patch, Third Party Advisory)
- github.com/upx/upx/commit/28e761cd42211dfe0124b7a29b2f74730f453e46 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-30501?
- CVE-2021-30501 is a medium-severity vulnerability in Upx, classified under Improper Input Validation. CVSS score: 5.5/10. Published 2021-05-27.
- How severe is CVE-2021-30501?
- Medium severity. CVSS v3 base score is 5.5 out of 10.