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>> Linux Kernel Security Update Fixes Multiple Denial of Service Vulnerabilities

Title : Linux Kernel Security Update Fixes Multiple Denial of Service Vulnerabilities
VUPEN ID : VUPEN/ADV-2006-2451
CVE ID : CVE-2006-2445 - CVE-2006-2448 - CVE-2006-3085
Rated as : Moderate Risk 
Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2006-06-20


Technical Description    Receive VUPEN Security alerts in a Text format  Receive VUPEN Security alerts in a PDF format  Receive VUPEN Security alerts in an XML format  Receive VUPEN Security notifications by SMS 

Multiple vulnerabilities have been identified in Linux Kernel, which could be exploited by attackers or malicious users to cause a denial of service.

The first issue is due to a race condition error in the "posix-cpu-timers.c" script that does not prevent another CPU from attaching the timer to an exiting process, which could be exploited by attackers to cause a denial of service.

The second flaw is due to errors in "powerpc/kernel/signal_32.c" and "powerpc/kernel/signal_32.c", which could allow userspace to provoke a machine check on 32-bit kernels.

The third vulnerability is due to an infinite loop in "netfilter/xt_sctp.c", which could be exploited by attackers to exhaust all available memory resources, creating a denial of service condition.

Affected Products

Linux Kernel version 2.6.16.20 and prior
Linux Kernel version 2.6.17 and prior

Solution

Upgrade to Linux Kernel version 2.6.16.21 or 2.6.17.1 :
http://www.kernel.org

References

http://www.vupen.com/english/advisories/2006/2451
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.21
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.17.1

Credits

Vulnerabilities reported by John Stultz and the vendor

ChangeLog

2006-06-20 : Initial release

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