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computer vulnerability alert CVE-2014-0195

OpenSSL: buffer overflow of DTLS

Synthesis of the vulnerability

An attacker can generate a buffer overflow via DTLS of OpenSSL, in order to trigger a denial of service, and possibly to execute code.
Vulnerable systems: ArubaOS, BES, ProxyAV, ProxySG par Blue Coat, SGOS by Blue Coat, Cisco ASR, Cisco ATA, Cisco ACE, ASA, AsyncOS, Cisco Catalyst, CiscoWorks, Cisco Content SMA, Cisco CSS, Cisco ESA, IOS by Cisco, IOS XE Cisco, IOS XR Cisco, Cisco IPS, IronPort Email, IronPort Management, IronPort Web, Nexus by Cisco, NX-OS, Prime Collaboration Assurance, Prime Collaboration Manager, Prime Infrastructure, Cisco PRSM, Cisco Router, Secure ACS, Cisco CUCM, Cisco Manager Attendant Console, Cisco Unified CCX, Cisco IP Phone, Cisco MeetingPlace, Cisco Wireless IP Phone, Cisco Unity ~ precise, WebNS, Cisco WSA, Debian, Avamar, EMC CAVA, EMC CEE, EMC CEPA, Celerra FAST, Celerra NS, Celerra NX4, EMC CMDCE, Connectrix Switch, ECC, NetWorker, PowerPath, Unisphere EMC, VNX Operating Environment, VNX Series, BIG-IP Hardware, TMOS, Fedora, FortiAnalyzer, FortiAnalyzer Virtual Appliance, FortiClient, FortiManager, FortiManager Virtual Appliance, FreeBSD, HP Operations, HP-UX, AIX, Juniper J-Series, Junos OS, Junos Pulse, Juniper Network Connect, Juniper UAC, McAfee Web Gateway, NetBSD, OpenBSD, OpenSSL, openSUSE, openSUSE Leap, Solaris, Polycom CMA, HDX, RealPresence Collaboration Server, Polycom VBP, RHEL, ACE Agent, ACE Server, RSA Authentication Agent, RSA Authentication Manager, SecurID, Slackware, stunnel, Ubuntu.
Severity of this threat: 3/4.
Consequences of a hack: privileged access/rights, user access/rights, denial of service on service, denial of service on client.
Pirate's origin: internet client.
Creation date: 05/06/2014.
Références of this weakness: aid-06062014, c04336637, c04363613, c04368523, CERTFR-2014-AVI-253, CERTFR-2014-AVI-254, CERTFR-2014-AVI-255, CERTFR-2014-AVI-260, CERTFR-2014-AVI-279, CERTFR-2014-AVI-286, CERTFR-2014-AVI-291, cisco-sa-20140605-openssl, CTX140876, CVE-2014-0195, DOC-53313, DSA-2950-1, DSA-2950-2, FEDORA-2014-17576, FEDORA-2014-17587, FEDORA-2014-7101, FEDORA-2014-7102, FG-IR-14-018, FreeBSD-SA-14:14.openssl, HPSBMU03069, HPSBUX03046, JSA10629, KB36051, MDVSA-2014:106, MDVSA-2015:062, NetBSD-SA2014-006, openSUSE-SU-2014:0764-1, openSUSE-SU-2014:0765-1, openSUSE-SU-2016:0640-1, RHSA-2014:0625-01, RHSA-2014:0628-01, RHSA-2014:0679-01, SA40006, SA80, SB10075, SOL15356, SSA:2014-156-03, SSRT101590, USN-2232-1, USN-2232-2, USN-2232-3, USN-2232-4, VIGILANCE-VUL-14846, ZDI-14-173.

Description of the vulnerability

The DTLS (Datagram Transport Layer Security) protocol, based on TLS, provides a cryptographic layer over the UDP protocol.

However, if the size of data of a DTLS fragment is greater than the size of the storage array, an overflow occurs.

An attacker can therefore generate a buffer overflow via DTLS of OpenSSL, in order to trigger a denial of service, and possibly to execute code.
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