BSD ICMPV6 Handling Routines Remote Denial Of Service Vulnerability

BID:9577

Info

BSD ICMPV6 Handling Routines Remote Denial Of Service Vulnerability

Bugtraq ID: 9577
Class: Failure to Handle Exceptional Conditions
CVE:
Remote: Yes
Local: No
Published: Feb 04 2004 12:00AM
Updated: Feb 04 2004 12:00AM
Credit: Vulnerability discovery credited to a source that has requested not to be credited in this database.
Vulnerable: OpenBSD OpenBSD 3.4
OpenBSD OpenBSD 3.3
OpenBSD OpenBSD 3.2
OpenBSD OpenBSD 3.1
OpenBSD OpenBSD 3.0
NetBSD NetBSD 1.6.1
NetBSD NetBSD 1.6
Not Vulnerable:

Discussion

BSD ICMPV6 Handling Routines Remote Denial Of Service Vulnerability

OpenBSD and NetBSD have been reported prone to a remote denial of service attack when configured to process IPV6 traffic. The issue occurs when an affected host handles certain types of ICMPV6 traffic. It has been reported that when traffic of the aforementioned type is handled an unspecified kernel error occurs, denying service to the affected system.

FreeBSD does not appear to be affected.

Exploit / POC

BSD ICMPV6 Handling Routines Remote Denial Of Service Vulnerability

An exploit example has been publicly released that demonstrates this issue.

Solution / Fix

BSD ICMPV6 Handling Routines Remote Denial Of Service Vulnerability

Solution:
The vendor has advised that affected customers running revision 1.81 of /src/sys/netinet6/ip6_output.c, download revision 1.82 of the file from CVS and recompile the kernel.

The vendor has released patches for OpenBSD 3.4-stable and 3.3-stable. Users are advised to update their software.

NetBSD has released an advisory that includes updates. Fix details may be found in the attached advisory.


OpenBSD OpenBSD 3.4

OpenBSD OpenBSD 3.3

References

BSD ICMPV6 Handling Routines Remote Denial Of Service Vulnerability

References:
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