CVE-2015-5600

CVE Details

Release Date:	2015-07-16
Impact:	Low	What is this?

Description

The kbdint_next_device function in auth2-chall.c in sshd in OpenSSHthrough 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.

See more information about CVE-2015-5600 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v2 metrics

Base Score:	4.3
Vector String:	AV:N/AC:M/Au:N/C:N/I:P/A:N
Version:	2.0
Attack Vector:	Network
Attack Complexity:	Medium
Authentication:	None
Confidentiality Impact:	None
Integrity Impact:	Partial
Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 5 (openssh)	ELSA-2016-3531	2016-04-03
Oracle Linux version 6 (openssh)	ELSA-2016-0466	2016-03-21
Oracle Linux version 7 (openssh)	ELSA-2015-2088	2015-11-23
Oracle VM version 3.2 (openssh)	OVMSA-2016-0070	2016-06-20
Oracle VM version 3.3 (openssh)	OVMSA-2016-0038	2016-03-21
Oracle VM version 3.4 (openssh)	OVMSA-2016-0038	2016-03-21