CVE-2013-6979

The VTY authentication implementation in Cisco IOS XE 03.02.xxSE and 03.03.xxSE incorrectly relies on the Linux-IOS internal-network configuration, which allows remote attackers to bypass authentication by leveraging access to a 192.168.x.2 source IP address, aka Bug ID CSCuj90227.

• CWE-287

• http://osvdb.org/101351
• http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-6979Vendor Advisory
• http://www.securityfocus.com/bid/64502Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1029537Third Party Advisory, VDB Entry
• https://exchange.xforce.ibmcloud.com/vulnerabilities/89901
• http://osvdb.org/101351
• http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-6979Vendor Advisory
• http://www.securityfocus.com/bid/64502Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1029537Third Party Advisory, VDB Entry
• https://exchange.xforce.ibmcloud.com/vulnerabilities/89901

Published

Dec 23, 2013

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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