Buffer overflow in Libressl
CVE-2015-5334
Off-by-one error in the OBJ_obj2txt function in LibreSSL before 2.3.1 allows remote attackers to cause a denial of service (program crash) or possible execute arbitrary code via a crafted X.509 certificate, which triggers a stack-based buffer overflow. Note: this vulnerability exists because of an incorrect fix for CVE-2014-3508.
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: 0.035 (88.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.035 · newest: 0.035 · change: 0.000
Affected products
- Libressl — versions before 2.3.1
- OpenBSD Libressl
- openSUSE — versions 13.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- packetstormsecurity.com/files/133998/Qualys-Security-Advisory-LibreSSL-Leak-Ove… (Exploit, VDB Entry, Third Party Advisory)
- seclists.org/fulldisclosure/2015/Oct/75 (Exploit, Mailing List, Third Party Advisory)
- www.securityfocus.com/archive/1/archive/1/536692/100/0/threaded (Broken Link)
- lists.opensuse.org/opensuse-updates/2015-10/msg00050.html (Mailing List, Third Party Advisory)
- ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.3.1-relnotes.txt (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2015-5334?
- CVE-2015-5334 is a critical-severity vulnerability in Libressl, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2020-01-23.
- How severe is CVE-2015-5334?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2015-5334 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.