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Vulnerability record · CVE-2015-5334 · published 23 January 2020

CVE-2015-5334: Openbsd libressl out-of-bounds write vulnerability

Openbsd · Libressl

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.

9.8 CVSS 3.1 Critical EPSS 3.5% · top 11.3% CWE-787 · Out-of-bounds write
9.8CVSS 3.1 base score, v2 7.5
3.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
10References, 4 tagged exploit
17 Jun 2026Last modified by NVD

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/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.3.1-relnotes.txt Release NotesVendor Advisory
http://lists.opensuse.org/opensuse-updates/2015-10/msg00050.html Mailing ListThird Party Advisory
http://packetstormsecurity.com/files/133998/Qualys-Security-Advisory-LibreSSL-Leak-Overflow.html ExploitThird Party AdvisoryVDB Entry
http://seclists.org/fulldisclosure/2015/Oct/75 ExploitMailing ListThird Party Advisory
http://www.securityfocus.com/archive/1/archive/1/536692/100/0/threaded Broken Link
http://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.3.1-relnotes.txt Release NotesVendor Advisory
http://lists.opensuse.org/opensuse-updates/2015-10/msg00050.html Mailing ListThird Party Advisory
http://packetstormsecurity.com/files/133998/Qualys-Security-Advisory-LibreSSL-Leak-Overflow.html ExploitThird Party AdvisoryVDB Entry
http://seclists.org/fulldisclosure/2015/Oct/75 ExploitMailing ListThird Party Advisory
http://www.securityfocus.com/archive/1/archive/1/536692/100/0/threaded Broken Link

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Source: NIST National Vulnerability Database (record CVE-2015-5334), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.