Buffer overflow in Daemonology Bsdiff
CVE-2020-14315
A memory corruption vulnerability is present in bspatch as shipped in Colin Percival’s bsdiff tools version 4.3. Insufficient checks when handling external inputs allows an attacker to bypass the sanity checks in place and write out of a dynamically allocated buffer boundaries.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.026 (84.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000
Affected products
- Daemonology Bsdiff — versions 4.3
- Bsdiff — versions bsdiff 4.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2020/07/09/2 (Mailing List, Third Party Advisory)
- www.x41-dsec.de/lab/advisories/x41-2020-006-bspatch/ (Exploit, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2020-14315?
- CVE-2020-14315 is a critical-severity vulnerability in Daemonology Bsdiff, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2020-09-16.
- How severe is CVE-2020-14315?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2020-14315 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.