#VU33288 Permissions, Privileges, and Access Controls in OpenSSH - CVE-2015-5600

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Main Vulnerability Database Vulnerabilities #VU33288

#VU33288 Permissions, Privileges, and Access Controls in OpenSSH - CVE-2015-5600

Published: August 3, 2015 / Updated: August 3, 2020


Vulnerability identifier: #VU33288
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2015-5600
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
OpenSSH
Software vendor:
OpenSSH

Description

The vulnerability allows a remote non-authenticated attacker to #BASIC_IMPACT#.

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.


Remediation

Install update from vendor's website.

External links