- Vulnerabilities 88,570
Cisco IOS Software SSH X.509 Authentication Bypass Vulnerability
Published: 2016-12-08 07:16:20
CVE Author: NIST National Vulnerability Database
CVSS Base Vector:
AV:N/AC:M/Au:N/C:P/I:P/A:N
Detection Method:
Checks if a vulnerable version is present on the target host.
Recommendations:
See the referenced vendor advisory for a solution.
Summary:
A vulnerability in the implementation of X.509 Version 3 for SSH
authentication functionality in Cisco IOS Software could allow an unauthenticated, remote attacker to bypass
authentication on an affected system.
Technical Details:
The vulnerability is due to improper validation of X.509 signatures during
the SSH authentication phase. An attacker could exploit this vulnerability by presenting an invalid X.509
signature to an affected system.
Impact:
A successful exploit could allow the attacker to impersonate an existing
valid user over an SSH connection.
Detection Type:
Linux Distribution Package
Solution Type:
Vendor Patch
https://nvd.nist.gov/vuln/detail/CVE-2016-6474
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161207-ios-xe-x509
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