70212 : OpenBSD carp_proto_input_c CARP Hash Modification DoS
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Timeline

Disclosure Date
2010-12-18

Description

OpenBSD contains a flaw that may allow a remote denial of service. The issue is triggered when the CARP implementation fails to include all fields contained in the 'carp_header' structure when calculating the SHA1 HMAC hash of the packet in the 'carp_proto_input_c' function, allowing an attacker to force all CARP nodes to assume the backup role, resulting in a denial of service.

Classification

Location: Remote / Network Access
Attack Type: Cryptographic, Denial of Service
Impact: Loss of Availability
Solution: Upgrade
Exploit: Exploit Public
Disclosure: Uncoordinated Disclosure

Solution

It has been reported that this issue has been fixed. Upgrade to the latest version to address this vulnerability.

Products

OpenBSD

4.8

References

Mail List Post: http://seclists.org/bugtraq/2010/Dec/200
Vendor URL: http://www.openbsd.org/

Credit

Sam Banks

CVSSv2 Score

NVD does not currently have a CVSSv2 score assigned.

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