CVE-2016-6474
published 2016-12-14CVE-2016-6474: A vulnerability in the implementation of X.509 Version 3 for SSH authentication functionality in Cisco IOS and IOS XE Software could allow an unauthenticated…
PriorityP345high7.3CVSS 3.0
AVNACLPRNUINSUCLILAL
EPSS
1.41%
69.9th percentile
A vulnerability in the implementation of X.509 Version 3 for SSH authentication functionality in Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to bypass authentication on an affected system. More Information: CSCuv89417. Known Affected Releases: 15.5(2.25)T. Known Fixed Releases: 15.2(4)E1 15.2(4)E2 15.2(4)E3 15.2(4)EA4 15.2(4.0r)EB 15.2(4.1.27)EB 15.2(4.4.2)EA4 15.2(4.7.1)EC 15.2(4.7.2)EC 15.2(5.1.1)E 15.2(5.5.63)E 15.2(5.5.64)E 15.4(1)IA1.80 15.5(3)M1.1 15.5(3)M2 15.5(3)S1.4 15.5(3)S2 15.6(0.22)S0.12 15.6(1)T0.1 15.6(1)T1 15.6(1.15)T 15.6(1.17)S0.7 15.6(1.17)SP 15.6(1.22.1a)T0 15.6(2)S 15.6(2)SP 16.1(1.24) 16.1.2 16.2(0.247) 16.3(0.11) 3.8(1)E Denali-16.1.2.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | ios | — | — |
| cisco | ios_and_ios_xe | — | — |
CVSS provenance
nvdv3.07.3HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
nvdv2.05.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:N
vendor_cisco5.8MEDIUM
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Cisco
Cisco IOS and IOS XE Software SSH X.509 Authentication Bypass Vulnerability
vendor_cisco·2016-12-07·CVSS 5.8
CVE-2016-6474 [MEDIUM] CWE-287 Cisco IOS and IOS XE Software SSH X.509 Authentication Bypass Vulnerability
Cisco IOS and IOS XE Software SSH X.509 Authentication Bypass Vulnerability
A vulnerability in the implementation of X.509 Version 3 for SSH authentication functionality in Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to bypass authentication on an affected system.
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. A successful exploit could allow the attacker to impersonate an existing valid user over an SSH connection.
There are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecuri
Cisco
Cisco IOS and IOS XE Software SSH X.509 Authentication Bypass Vulnerability
vendor_cisco
CVE-2016-6474 Cisco IOS and IOS XE Software SSH X.509 Authentication Bypass Vulnerability
CVE-2016-6474: Cisco IOS and IOS XE Software SSH X.509 Authentication Bypass Vulnerability
A vulnerability in the implementation of X.509 Version 3 for SSH authentication functionality in Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to bypass authentication on an affected system. 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. A successful exploit could allow the attacker to impersonate an existing valid user over an SSH connection. There are no
CWE: CWE-287, CWE-287
Bug IDs: CSCuv89417
GHSA
GHSA-xqx5-4vvj-rqwr: A vulnerability in the implementation of X
ghsa_unreviewed·2022-05-17
CVE-2016-6474 [HIGH] CWE-287 GHSA-xqx5-4vvj-rqwr: A vulnerability in the implementation of X
A vulnerability in the implementation of X.509 Version 3 for SSH authentication functionality in Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to bypass authentication on an affected system. More Information: CSCuv89417. Known Affected Releases: 15.5(2.25)T. Known Fixed Releases: 15.2(4)E1 15.2(4)E2 15.2(4)E3 15.2(4)EA4 15.2(4.0r)EB 15.2(4.1.27)EB 15.2(4.4.2)EA4 15.2(4.7.1)EC 15.2(4.7.2)EC 15.2(5.1.1)E 15.2(5.5.63)E 15.2(5.5.64)E 15.4(1)IA1.80 15.5(3)M1.1 15.5(3)M2 15.5(3)S1.4 15.5(3)S2 15.6(0.22)S0.12 15.6(1)T0.1 15.6(1)T1 15.6(1.15)T 15.6(1.17)S0.7 15.6(1.17)SP 15.6(1.22.1a)T0 15.6(2)S 15.6(2)SP 16.1(1.24) 16.1.2 16.2(0.247) 16.3(0.11) 3.8(1)E Denali-16.1.2.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
http://www.securityfocus.com/bid/94773http://www.securitytracker.com/id/1037420https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161207-ios-xe-x509http://www.securityfocus.com/bid/94773http://www.securitytracker.com/id/1037420https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161207-ios-xe-x509
2016-12-14
Published