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
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
OpenBSD
4.8

References

Credit

CVSSv2 Score

NVD does not currently have a CVSSv2 score assigned.

Comments

No Comments.

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