7.3
HIGH
CVE-2016-6474
Cisco SSH X.509 Authentication Bypass Vulnerability
Description

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.

INFO

Published Date :

Dec. 14, 2016, 12:59 a.m.

Last Modified :

Jan. 5, 2017, 12:58 p.m.

Remotely Exploitable :

Yes !

Impact Score :

3.4

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2016-6474 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Cisco ios
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2016-6474.

URL Resource
http://www.securityfocus.com/bid/94773 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1037420 Third Party Advisory VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161207-ios-xe-x509 Mitigation Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2016-6474 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2016-6474 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Jan. 05, 2017

    Action Type Old Value New Value
    Changed Reference Type http://www.securitytracker.com/id/1037420 No Types Assigned http://www.securitytracker.com/id/1037420 Third Party Advisory, VDB Entry
  • CVE Modified by [email protected]

    Dec. 23, 2016

    Action Type Old Value New Value
    Added Reference http://www.securitytracker.com/id/1037420 [No Types Assigned]
  • Initial Analysis by [email protected]

    Dec. 15, 2016

    Action Type Old Value New Value
    Added CPE Configuration Configuration 1 OR *cpe:2.3:o:cisco:ios:15.5\(2.25\)t:*:*:*:*:*:*:*
    Added CVSS V2 (AV:N/AC:M/Au:N/C:P/I:P/A:N)
    Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
    Changed Reference Type http://www.securityfocus.com/bid/94773 No Types Assigned http://www.securityfocus.com/bid/94773 Third Party Advisory, VDB Entry
    Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161207-ios-xe-x509 No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161207-ios-xe-x509 Mitigation, Vendor Advisory
    Added CWE CWE-287
  • CVE Modified by [email protected]

    Dec. 15, 2016

    Action Type Old Value New Value
    Added Reference http://www.securityfocus.com/bid/94773 [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2016-6474 is associated with the following CWEs:

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.22 }} 0.00%

score

0.57697

percentile

CVSS30 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability