Improper input validation in OpenSSH - #VU2088
Published: December 21, 2016
Vulnerability identifier: #VU2088
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OpenSSH
Affected software:
OpenSSH
OpenSSH
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass certain security restrictions.
The vulnerability exists due to an error in sshd, which can be used to bypass address-based access controls if the AllowUser directive is configured with invalid CIDR address ranges.
Successful exploitation of this vulnerability may allow a remote attacker to bypass implemented access control mechanisms and perform a further attacks against vulnerable system.
The vulnerability exists due to an error in sshd, which can be used to bypass address-based access controls if the AllowUser directive is configured with invalid CIDR address ranges.
Successful exploitation of this vulnerability may allow a remote attacker to bypass implemented access control mechanisms and perform a further attacks against vulnerable system.
Remediation
Install the latest version of OpenSSH 7.4.