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>> NetBSD Security Update Fixes Multiple Function Denial of Service Vulnerabilities
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Multiple vulnerabilities have been identified in NetBSD, which could be exploited by attackers to cause a denial of service.
The first issue is due to an error in the "sys_accept()" function when handling a malformed "name" or "namelen" parameter, which could cause sockets to be left in the "CLOSE_WAIT" state.
The second flaw is due to an error in the "sendit()" function that does not validate the "msg_controllen" parameter, which could be exploited to cause a kernel panic on 64-bit architectures, creating a denial of service.
The third vulnerability is due to a NULL pointer dereference error in the "procfs_do_pid_stat()" function when trying to read "/emul/linux/proc/0/stat" on a procfs mounted with the "linux" option, which could cause a kernel panic, creating a denial of service.
Affected Products
NetBSD 3.x
NetBSD 2.x
Solution
Upgrade to a fixed version :
ftp://ftp.netbsd.org/pub/NetBSD/
References
http://www.vupen.com/english/advisories/2006/4735
ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2006-026.txt.asc
Credits
Vulnerabilities reported by Sean Boudreau, Ryo Shimizu, and Nicolas Joly.
ChangeLog
2006-11-28 : Initial release
Vulnerability Management
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