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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2015-1791
• openssl/openssl@98ece4e
• https://bto.bluecoat.com/security-advisory/sa98
• https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05045763
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• http://marc.info/?l=bugtraq&m=143880121627664&w=2
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• http://www.fortiguard.com/advisory/openssl-vulnerabilities-june-2015
• http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
• http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
• http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
• http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
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• http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
• http://www.securityfocus.com/bid/75161
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• http://www.securitytracker.com/id/1032479
• http://www.ubuntu.com/usn/USN-2639-1
• https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf