CVE-2013-6979 Auth bypass in n/a
Remote attackers can bypass VTY authentication in Cisco IOS XE by leveraging specific internal IP configurations, requiring vendor patches.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2013-6979?
CVE-2013-6979 is a medium-severity authentication bypass vulnerability in Cisco Ios Xe, published on 23 Dec 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-287
Which versions are affected by CVE-2013-6979?
It affects 1 product.
Products include Cisco Ios Xe.
How do I fix CVE-2013-6979?
No fix has been published for CVE-2013-6979 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2013-6979 being exploited?
There is no known exploitation of CVE-2013-6979 in the wild and no public exploit code.
Other vulnerabilities in Cisco Ios Xe
- CVE-2023-20198 Cisco IOS XE Web UI Privilege Escalation
- CVE-2018-0151 Cisco IOS Software and Cisco IOS XE Software Quality of Service Remote Code Execution
- CVE-2023-20273 Cisco IOS XE Web UI Command Injection
- CVE-2025-20188 Hardcoded credentials in Cisco IOS XE Software
- CVE-2021-34770 Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Remote Code Execution Vulnerability
Sources
Also known as GHSA-rvr7-79c9-w4jr.