CVE-2015-1791

Severity: medium (CVSS 6.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 16.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2015-06-12 · updated 2026-06-17
Weakness: CWE-362

Description

Race condition in the ssl3_get_new_session_ticket function in ssl/s3_clnt.c in OpenSSL before 0.9.8zg, 1.0.0 before 1.0.0s, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b, when used for a multi-threaded client, allows remote attackers to cause a denial of service (double free and application crash) or possibly have unspecified other impact by providing a NewSessionTicket during an attempt to reuse a ticket that had been obtained earlier.

Affected products

OpenSSL: through 0.9.8zf; 1.0.0, 1.0.0-beta1, 1.0.0-beta2, 1.0.0-beta3, 1.0.0-beta4, 1.0.0-beta5 (+38)

References

http://fortiguard.com/advisory/openssl-vulnerabilities-june-2015
http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2015-008.txt.asc
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10694
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10733
http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/160436.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/160647.html
http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00023.html
http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00024.html
http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00026.html
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00006.html

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