4668 : FreeBSD KAME Project IPv6 setsockopt() DoS
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Disclosure Date


FreeBSD contains a flaw due to the manner in which it implements KAME Project IPv6 code that may allow a remote denial of service. The issue is an input validation flaw in the "setsockopt()" system call when handling certain IPv6 socket options, and will result in loss of availability for the platform.


Location: Remote / Network Access
Impact: Loss of Availability


Upgrade to version RELENG_5_2 security branch or higher, as it has been reported to fix this vulnerability. Also, FreeBSD has released a patch.


The FreeBSD Project


Tools & Filters



  • Katsuhisa ABE -
  • Colin Percival - colin.percivalwadham.ox.ac.uk -

CVSSv2 Score

CVSSv2 Base Score = 2.1
Source: nvd.nist.gov | Generated: 2003-12-31 | Disagree?

Access_vector_0 Access_complexity_2 Authentication_2 Confidentiality_impact_1 Integrity_impact_0 Availability_impact_0


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