CWE
476
Advisory Published
CVE Published
Updated

CVE-2010-3079: Null Pointer Dereference

First published: Wed Sep 08 2010(Updated: )

Description of problem: It requires debugfs to be mounted on a local system $ mount | grep debugfs none on /sys/kernel/debug type debugfs (rw) none on /var/lib/ureadahead/debugfs type debugfs (rw,relatime) Tested with Ubuntu Maverick 10.04.1 with kernel 2.6.32-24-generic-pae. It's probably not exploitable in any meaningful way, although it produces page fault in kernel mode, and makes subsequent processes opening /sys/kernel/debug/tracing/set_ftrace_filter (or set_ftrace_notrace) unkillable, so it's a little bit of a DoS (or at least, annoyance). Found via one of Tavis Ormandy's tools, I just quickly analyzed it and provided a testcase. Acknowledgements: Red Hat would like to thank Robert Swiecki of Google Security Team for reporting this issue.

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

Affected SoftwareAffected VersionHow to fix
debian/linux-2.6
Linux Linux kernel<2.6.35.5
Canonical Ubuntu Linux=9.10
Canonical Ubuntu Linux=10.04
Canonical Ubuntu Linux=10.10
SUSE Linux Enterprise Desktop=11
Suse Linux Enterprise High Availability Extension=11-sp1
SUSE Linux Enterprise Server=11

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