CVE-2012-4620

Severity: high (CVSS 7.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-09-27 · updated 2026-06-16
Weakness: CWE-399

Description

Cisco IOS 12.2 and 15.0 through 15.2 on Cisco 10000 series routers, when a tunnel interface exists, allows remote attackers to cause a denial of service (interface queue wedge) via tunneled (1) GRE/IP, (2) IPIP, or (3) IPv6 in IPv4 packets, aka Bug ID CSCts66808.

Affected products

Cisco 10008 Router: all versions
Cisco IOS: 12.2, 15.0, 15.0(1)se, 15.1, 15.2

References

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120926-c10k-tunnels
http://www.securityfocus.com/bid/55696
http://www.securitytracker.com/id?1027578
https://exchange.xforce.ibmcloud.com/vulnerabilities/78883
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120926-c10k-tunnels
http://www.securityfocus.com/bid/55696
http://www.securitytracker.com/id?1027578
https://exchange.xforce.ibmcloud.com/vulnerabilities/78883

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