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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.49%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.49% probability · 89th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- openbsd/libressl · opensuse/opensuse
- Source
- secalert@redhat.com
EPSS 3.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.3.1-relnotes.txtRelease Notes, Vendor Advisory
- http://lists.opensuse.org/opensuse-updates/2015-10/msg00050.htmlMailing List, Third Party Advisory
- http://packetstormsecurity.com/files/133998/Qualys-Security-Advisory-LibreSSL-Leak-Overflow.htmlExploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2015/Oct/75Exploit, Mailing List, Third Party Advisory
- http://www.securityfocus.com/archive/1/archive/1/536692/100/0/threadedBroken Link
- http://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.3.1-relnotes.txtRelease Notes, Vendor Advisory
- http://lists.opensuse.org/opensuse-updates/2015-10/msg00050.htmlMailing List, Third Party Advisory
- http://packetstormsecurity.com/files/133998/Qualys-Security-Advisory-LibreSSL-Leak-Overflow.htmlExploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2015/Oct/75Exploit, Mailing List, Third Party Advisory
- http://www.securityfocus.com/archive/1/archive/1/536692/100/0/threadedBroken Link
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.