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CVSS: 6.0EPSS: 1%CPEs: 2EXPL: 0

The mm_newkeys_from_blob function in monitor_wrap.c in sshd in OpenSSH 6.2 and 6.3, when an AES-GCM cipher is used, does not properly initialize memory for a MAC context data structure, which allows remote authenticated users to bypass intended ForceCommand and login-shell restrictions via packet data that provides a crafted callback address. La función mm_newkeys_from_blob en monitor_wrap.c de sshd en OpenSSH 6.2 y 6.3, cuando se utiliza el cifrado AES-GCM, no inicia correctamente la memoria para una estructura de datos de contexto MAC, lo que permite a usuarios remotos autenticados evadir intencionadamente ForceCommand y restricciones login-shell a través de un paquete de datos que proporciona una dirección de rellamada manipulada. • http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00017.html http://marc.info/?l=bugtraq&m=141576985122836&w=2 http://openwall.com/lists/oss-security/2013/11/08/3 http://www.openssh.com/txt/gcmrekey.adv http://www.ubuntu.com/usn/USN-2014-1 • CWE-264: Permissions, Privileges, and Access Controls •