CWE
476
Advisory Published
CVE Published
Updated

CVE-2010-3437: Null Pointer Dereference

First published: Tue Sep 28 2010(Updated: )

Description of problem: The PKT_CTRL_CMD_STATUS device ioctl retrieves a pointer to a pktcdvd_device from the global pkt_devs array. The index into this array is provided directly by the user and is a signed integer, so the comparison to ensure that it falls within the bounds of this array will fail when provided with a negative index. This can be used to read arbitrary kernel memory or cause a crash due to an invalid pointer dereference. This can be exploited by users with permission to open /dev/pktcdvd/control (on many distributions, this is readable by group "cdrom"). Upstream commit: <a href="http://git.kernel.org/linus/252a52aa4fa22a668f019e55b3aac3ff71ec1c29">http://git.kernel.org/linus/252a52aa4fa22a668f019e55b3aac3ff71ec1c29</a>

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
debian/linux-2.6
Linux Linux kernel<2.6.36
Linux Linux kernel=2.6.36
Linux Linux kernel=2.6.36-rc1
Linux Linux kernel=2.6.36-rc2
Linux Linux kernel=2.6.36-rc3
Linux Linux kernel=2.6.36-rc4
Linux Linux kernel=2.6.36-rc5
openSUSE openSUSE=11.2
openSUSE openSUSE=11.3
SUSE Linux Enterprise Desktop=10-sp3
SUSE Linux Enterprise Desktop=11-sp1
Suse Linux Enterprise Real Time Extension=11-sp1
SUSE Linux Enterprise Server=9
SUSE Linux Enterprise Server=10-sp3
SUSE Linux Enterprise Server=11-sp1
SUSE Linux Enterprise Software Development Kit=10-sp3
Debian Debian Linux=5.0
Canonical Ubuntu Linux=6.06
Canonical Ubuntu Linux=8.04
Canonical Ubuntu Linux=9.04
Canonical Ubuntu Linux=9.10
Canonical Ubuntu Linux=10.04
Canonical Ubuntu Linux=10.10

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