CVE-2009-2872

Severity: medium (CVSS 6.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-09-28 · updated 2026-06-16

Description

Cisco IOS 12.0 through 12.4, when IP-based tunnels and the Cisco Express Forwarding feature are enabled, allows remote attackers to cause a denial of service (device reload) via a malformed packet that is not properly handled during switching from one tunnel to a second tunnel, aka Bug IDs CSCsh97579 and CSCsq31776.

Affected products

Cisco IOS: 12.0, 12.0da, 12.0db, 12.0dc, 12.0s, 12.0sc (+282)

References

http://osvdb.org/58333
http://tools.cisco.com/security/center/viewAlert.x?alertId=18893
http://www.cisco.com/en/US/products/products_applied_mitigation_bulletin09186a0080af8113.html
http://www.cisco.com/en/US/products/products_security_advisory09186a0080af8115.shtml
http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep09.html
http://www.securitytracker.com/id?1022930
http://www.vupen.com/english/advisories/2009/2759
http://osvdb.org/58333
http://tools.cisco.com/security/center/viewAlert.x?alertId=18893
http://www.cisco.com/en/US/products/products_applied_mitigation_bulletin09186a0080af8113.html
http://www.cisco.com/en/US/products/products_security_advisory09186a0080af8115.shtml
http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep09.html

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