PT-2009-5230 · Cisco · Cisco Ios

Published 2009-09-23 · Updated 2009-10-01 · CVE-2009-2872

Positive Technologies (AI Summary)

CVSS v2.0

6.8

Medium

Base vector

AV:N/AC:L/Au:S/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions: Cisco IOS versions 12.0 through 12.4

Description: The issue 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 when IP-based tunnels and the Cisco Express Forwarding feature are enabled. Cisco devices running affected versions of Cisco IOS Software are vulnerable to a denial of service (DoS) attack if configured for IP tunnels and Cisco Express Forwarding.

Recommendations: For Cisco IOS versions 12.0 through 12.4, update to a version that includes the software updates released by Cisco to address this issue. As a temporary workaround, consider disabling the IP-based tunnels and the Cisco Express Forwarding feature until a patch is available.

Fix

Related Identifiers

CVE-2009-2872

Affected Products

Cisco Ios

References · 9

• http://cisco.com/web/about/security/intelligence/Cisco_ERP_sep09.html · Vendor Advisory
• http://cisco.com/en/US/products/products_security_advisory09186a0080af8115.shtml · Vendor Advisory
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20090923-tunnels · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2009-2872 · Security Note
• http://cisco.com/en/US/products/products_applied_mitigation_bulletin09186a0080af8113.html · Vendor Advisory
• http://tools.cisco.com/security/center/viewAlert.x?alertId=18893 · Vendor Advisory
• http://osvdb.org/58333 · Note
• http://securitytracker.com/id?1022930 · Note
• http://vupen.com/english/advisories/2009/2759 · Note