Buffer overflow in Upx
CVE-2021-20285
A flaw was found in upx canPack in p_lx_elf.cpp in UPX 3.96. This flaw allows attackers to cause a denial of service (SEGV or buffer overflow and application crash) or possibly have unspecified other impacts via a crafted ELF. The highest threat from this vulnerability is to system availability.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H.
EPSS exploit prediction
EPSS: 0.008 (53.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Upx — versions 3.96
- Upx — versions UPX 3.96
Weakness classification (CWE)
References
- github.com/upx/upx/issues/421 (Exploit, Third Party Advisory, Issue Tracking)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2021-20285?
- CVE-2021-20285 is a medium-severity vulnerability in Upx, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.6/10. Published 2021-03-26.
- How severe is CVE-2021-20285?
- Medium severity. CVSS v3 base score is 6.6 out of 10.