Secunia Security Advisory - A vulnerability with unknown impact has been reported in the Linux Kernel.
e0d4f5462e45be0cb164acc5c6bdd9ba5a2e6c369bd77d5cccaf3ebd151399a6
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TITLE:
Linux Kernel "isdn_net_setcfg()" Buffer Overflow Vulnerability
SECUNIA ADVISORY ID:
SA27842
VERIFY ADVISORY:
http://secunia.com/advisories/27842/
CRITICAL:
Less critical
IMPACT:
Unknown
WHERE:
Local system
OPERATING SYSTEM:
Linux Kernel 2.6.x
http://secunia.com/product/2719/
DESCRIPTION:
A vulnerability with unknown impact has been reported in the Linux
Kernel.
The vulnerability is caused due to a boundary error within the
"isdn_net_setcfg()" function in drivers/isdn/i4l/isdn_net.c when
processing IOCTL configuration requests sent to the ISDN pseudo
device (/dev/isdnctrl). This can be exploited to cause a buffer
overflow via a specially crafted IIOCNETSCF IOCTL request.
Successful exploitation requires write access to /dev/isdnctrl.
The vulnerability is reported in version 2.6.23. Other versions may
also be affected.
SOLUTION:
Fixed in the GIT repository.
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=0f13864e5b24d9cbe18d125d41bfa4b726a82e40
Restrict write access to /dev/isdnctrl to trusted users only.
PROVIDED AND/OR DISCOVERED BY:
Venustech AD-LAB
ORIGINAL ADVISORY:
http://bugzilla.kernel.org/show_bug.cgi?id=9416
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