CVE-2015-5334

Name: CVE-2015-5334
Creator: NVD / NIST
Published: 2020-01-23T20:15:12.027+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 3.49%

Last modified Jun 17, 2026

CVE-2015-5334 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 3.49% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

3.49%

87.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Openbsd	Libressl	< 2.3.1
Opensuse	Opensuse	13.2

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

Timeline

Published: Jan 23, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-5334?

How severe is CVE-2015-5334?

CVE-2015-5334 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.49% probability of exploitation in the next 30 days.

How do I fix CVE-2015-5334?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2015-5334?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST