Cisco IOS OSPF denial of service

cisco-ios-cve20135527-dos (87762) The risk level is classified as MediumMedium Risk

Description:

Cisco IOS and Cisco IOS XE are vulnerable to a denial of service, caused by the improper parsing of certain options in OSPF link-state advertisement (LSA) type 11 packets by the OSPF implementation. By sending LSA type 11 OSPF packets with unusual options set, an attacker could exploit this vulnerability to cause the device to reload.

*CVSS:

Base Score: 5.7
  Access Vector: Adjacent Network
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Complete
 
Temporal Score: 4.2
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Refer to the Cisco Security Notice for patch, upgrade or suggested workaround information. See References.

References:

  • Cisco Security Notice: Cisco IOS Software OSPF Opaque LSA Denial of Service Vulnerability .
  • BID-62904: Cisco IOS and IOS XE OSPF Opaque LSA CVE-2013-5527 Denial of Service Vulnerability
  • CVE-2013-5527: The OSPF functionality in Cisco IOS and IOS XE allows remote attackers to cause a denial of service (device reload) via crafted options in an LSA type 11 packet, aka Bug ID CSCui21030.
  • OSVDB ID: 98253: Cisco IOS / IOS XE Malformed OSPF Link-state Advertisement (LSA) Type 11 Packet Handling Remote DoS

Platforms Affected:

  • Cisco IOS

Reported:

Oct 09, 2013

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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