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OpenSSL: memory leak via Session Ticket
Synthesis of the vulnerability
An attacker can use a malicious Session Ticket, to create a memory leak in OpenSSL, in order to trigger a denial of service.
Impacted software: StormShield, ProxyAV, ProxySG par Blue Coat, SGOS by Blue Coat, Debian, BIG-IP Hardware, TMOS, FreeBSD, hMailServer, ProCurve Switch, HP Switch, HP-UX, AIX, Tivoli Workload Scheduler, McAfee Email and Web Security, McAfee Email Gateway, ePO, VirusScan, McAfee Web Gateway, NetBSD, OpenBSD, OpenSSL, openSUSE, openSUSE Leap, Solaris, Puppet, RHEL, Slackware, Splunk Enterprise, stunnel, SUSE Linux Enterprise Desktop, SLES, Ubuntu, ESXi, vCenter Server, VMware vSphere, VMware vSphere Hypervisor, WinSCP.
Severity of this computer vulnerability: 2/4.
Consequences of a hack: denial of service on service, denial of service on client.
Attacker's origin: internet client.
Creation date: 15/10/2014.
Références of this announce: 1691140, 1696383, c04492722, c04616259, CERTFR-2014-AVI-435, CERTFR-2014-AVI-509, CERTFR-2015-AVI-024, CERTFR-2016-AVI-303, CTX216642, CVE-2014-3567, DSA-3053-1, ESXi500-201502001, ESXi500-201502101-SG, ESXi510-201503001, ESXi510-201503001-SG, ESXi510-201503101-SG, ESXi550-201501001, ESXi550-201501101-SG, FreeBSD-SA-14:23.openssl, HPSBHF03300, HPSBUX03162, MDVSA-2014:203, MDVSA-2015:062, NetBSD-SA2014-015, openSUSE-SU-2014:1331-1, openSUSE-SU-2014:1426-1, openSUSE-SU-2016:0640-1, RHSA-2014:1652-01, RHSA-2014:1653-01, RHSA-2014:1692-01, RHSA-2015:0126-01, SA87, SB10091, SOL15723, SP-CAAANST, SPL-91947, SPL-91948, SSA:2014-288-01, SSRT101767, STORM-2014-003, SUSE-SU-2014:1357-1, SUSE-SU-2014:1361-1, SUSE-SU-2014:1386-1, SUSE-SU-2014:1387-1, SUSE-SU-2014:1387-2, SUSE-SU-2014:1409-1, USN-2385-1, VIGILANCE-VUL-15490, VMSA-2015-0001, VMSA-2015-0001.1, VMSA-2015-0001.2.
Description of the vulnerability
The OpenSSL product implements a SSL/TLS/DTLS client/server.
When the server receives a session ticket, it checks its integrity. However, if this ticket is invalid, the memory allocated for its processing is never freed.
An attacker can therefore use a malicious Session Ticket, to create a memory leak in OpenSSL, in order to trigger a denial of service.
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