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Vulnerability record · CVE-2014-3509 · published 13 August 2014

CVE-2014-3509: Openssl race condition vulnerability

OOpenssl · Openssl

Race condition in the ssl_parse_serverhello_tlsext function in t1_lib.c in OpenSSL 1.0.0 before 1.0.0n and 1.0.1 before 1.0.1i, when multithreading and session resumption are used, allows remote SSL servers to cause a denial of service (memory overwrite and client application crash) or possibly have unspecified other impact by sending Elliptic Curve (EC) Supported Point Formats Extension data.

6.8 CVSS 2.0 Medium EPSS 13% · top 3.7% CWE-362 · Race condition
6.8CVSS 2.0 base score
13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
104References
17 Jun 2026Last modified by NVD

Description

Race condition in the ssl_parse_serverhello_tlsext function in t1_lib.c in OpenSSL 1.0.0 before 1.0.0n and 1.0.1 before 1.0.1i, when multithreading and session resumption are used, allows remote SSL servers to cause a denial of service (memory overwrite and client application crash) or possibly have unspecified other impact by sending Elliptic Curve (EC) Supported Point Formats Extension data.

AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

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

References

LinkTags
ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2014-008.txt.asc
http://aix.software.ibm.com/aix/efixes/security/openssl_advisory10.asc
http://linux.oracle.com/errata/ELSA-2014-1052.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136470.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136473.html
http://lists.opensuse.org/opensuse-updates/2014-08/msg00036.html
http://marc.info/?l=bugtraq&m=142350350616251&w=2
http://marc.info/?l=bugtraq&m=142495837901899&w=2
http://marc.info/?l=bugtraq&m=142624590206005&w=2
http://marc.info/?l=bugtraq&m=142660345230545&w=2
http://marc.info/?l=bugtraq&m=142791032306609&w=2
http://marc.info/?l=bugtraq&m=143290437727362&w=2
http://marc.info/?l=bugtraq&m=143290522027658&w=2
http://rhn.redhat.com/errata/RHSA-2015-0197.html
http://secunia.com/advisories/58962
http://secunia.com/advisories/59700
http://secunia.com/advisories/59710
http://secunia.com/advisories/59756
http://secunia.com/advisories/60022
http://secunia.com/advisories/60221
http://secunia.com/advisories/60493
http://secunia.com/advisories/60684
http://secunia.com/advisories/60803
http://secunia.com/advisories/60917
http://secunia.com/advisories/60921
http://secunia.com/advisories/60938
http://secunia.com/advisories/61017
http://secunia.com/advisories/61100
http://secunia.com/advisories/61139
http://secunia.com/advisories/61184
http://secunia.com/advisories/61775
http://secunia.com/advisories/61959
http://security.gentoo.org/glsa/glsa-201412-39.xml
http://www-01.ibm.com/support/docview.wss?uid=nas8N1020240
http://www-01.ibm.com/support/docview.wss?uid=swg21682293
http://www-01.ibm.com/support/docview.wss?uid=swg21683389
http://www-01.ibm.com/support/docview.wss?uid=swg21686997
http://www.debian.org/security/2014/dsa-2998
http://www.huawei.com/en/security/psirt/security-bulletins/security-advisories/hw-372998.htm
http://www.mandriva.com/security/advisories?name=MDVSA-2014:158

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2014-3509), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.