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>> Linux Kernel Fault Handler Range Check Memory Corruption Vulnerability

Title : Linux Kernel Fault Handler Range Check Memory Corruption Vulnerability
VUPEN ID : VUPEN/ADV-2008-0445
CVE ID : CVE-2008-0007
Rated as : Moderate Risk 
Remotely Exploitable : No
Locally Exploitable : Yes
Release Date : 2008-02-07


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 

A vulnerability has been identified in Linux Kernel, which could be exploited by local attackers to bypass security restrictions, cause a denial of service or potentially gain elevated privileges. This issue is caused due to insufficient range checks in certain fault handlers within the "drivers/char/drm/drm_vm.c", "drivers/char/mspec.c", "fs/ncpfs/mmap.c", "kernel/relay.c", "mm/mmap.c", "sound/oss/via82cxxx_audio.c", "sound/usb/usx2y/usX2Yhwdep.c" and "sound/usb/usx2y/usx2yhwdeppcm.c" files, which could be exploited by local attackers to potentially read or write arbitrary kernel memory.

Affected Products

Linux Kernel versions 2.6.x
Linux Kernel versions 2.4.x

Solution

Upgrade to Linux Kernel version 2.6.22.17 or 2.4.36.1 :
http://www.kernel.org

References

http://www.vupen.com/english/advisories/2008/0445
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.22.17
http://www.kernel.org/pub/linux/kernel/v2.4/ChangeLog-2.4.36.1

Credits

Vulnerability reported by the vendor.

ChangeLog

2008-02-07 : Initial release
2008-02-18 : Updated Solution

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