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  OpenSSH kbdint_next_device Function Security Feature Bypass 2

Category: MISC      

The kbdint_next_device function in auth2-chall.c in sshd in OpenSSH through 6.9 does not properly restrict the processing of keyboard-interactive devices within a single connection, which makes it easier for remote attackers to conduct brute-force attacks or cause a denial of service (CPU consumption) via a long and duplicative list in the ssh -oKbdInteractiveDevices option, as demonstrated by a modified client that provides a different password for each pam element on this list.

References
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5600


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