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Category:   OS (UNIX)  >   NetBSD Vendors:   NetBSD
NetBSD swapctl(2) Integer Error Lets Local Users Crash the System
SecurityTracker Alert ID:  1010473
SecurityTracker URL:  http://securitytracker.com/id/1010473
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Jun 11 2004
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in the NetBSD kernel in the swapctl(2) system call. A local user can cause the kernel to crash.

Evgeny Demidov reported that the system call does not properly handle integers.

The flaw reportedly resides in 'src/sys/uvm/uvm_swap.c'.

Impact:   A local user can cause the kernel to crash.
Solution:   The vendor has released a fix, available via CVS at:

http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/uvm/uvm_swap.c.diff?r1=1.85&r2=1.85.2.1

Vendor URL:  www.netbsd.org/ (Links to External Site)
Cause:   Boundary error

Message History:   None.


 Source Message Contents

Subject:  [Full-Disclosure] NetBSD kernel swapctl(2) vulnerability



Name:          NetBSD kernel swapctl(2) vulnerability
Date:          11 June 2004
CVE candidate: not assigned
Author:        Evgeny Demidov

Description:

There exists a integer handling vulnerability in NetBSD 
swapctl(2) system call.
It seems that this vulnerability can not be exploited to 
gain super-user
privilegies, but any local attacker can crash the kernel.

Fix:

It is available in CVS: 
http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/uvm/uvm_swap.c.diff?r1=1.85&r2=1.85.2.1

History:

The vulnerability has been discovered several months ago 
by Evgeny Demidov during NetBSD kernel source code au
dit.
It has been made availabe to VulnDisco clients two months 
ago.

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html

 
 


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