NetBSD sendmsg Denial of Service Vulnerability

BID:3088

Info

NetBSD sendmsg Denial of Service Vulnerability

Bugtraq ID: 3088
Class: Input Validation Error
CVE:
Remote: No
Local: Yes
Published: Jul 24 2001 12:00AM
Updated: Jul 24 2001 12:00AM
Credit: Published in a NetBSD Security Advisory on July 24, 2001.
Vulnerable: NetBSD NetBSD 1.5
NetBSD NetBSD 1.4.3
NetBSD NetBSD 1.4.2
NetBSD NetBSD 1.4.1
NetBSD NetBSD 1.4
NetBSD NetBSD 1.3.3
NetBSD NetBSD 1.3.2
NetBSD NetBSD 1.3.1
NetBSD NetBSD 1.3
NetBSD NetBSD current pre20010701
Not Vulnerable: NetBSD NetBSD 1.5.1

Discussion

NetBSD sendmsg Denial of Service Vulnerability

A potential denial of service vulnerability exists in the NetBSD kernel.

The problem is the result of an input validation error in the sendmsg(2) function and is due to insufficient length checking on the 'msg_controllen' member of the 'msghdr' structure.

Because the kernel fails to check the length given with the msg_controllen member, it is possible to cause a page fault trap or 'out of space in kmem_map' kernel panic if the value is sized to a large enough value.

Solution / Fix

NetBSD sendmsg Denial of Service Vulnerability

Solution:
Vendor-supplied updates that rectify this issue are available:


NetBSD NetBSD current pre20010701

NetBSD NetBSD 1.3

NetBSD NetBSD 1.3.1

NetBSD NetBSD 1.3.2

NetBSD NetBSD 1.3.3

NetBSD NetBSD 1.4

NetBSD NetBSD 1.4.1

NetBSD NetBSD 1.4.2

NetBSD NetBSD 1.4.3

NetBSD NetBSD 1.5

References

NetBSD sendmsg Denial of Service Vulnerability

References:

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