Description
kernel/trace/ftrace.c in the Linux kernel before 2.6.35.5, when debugfs is enabled, does not properly handle interaction between mutex possession and llseek operations, which allows local users to cause a denial of service (NULL pointer dereference and outage of all function tracing files) via an lseek call on a file descriptor associated with the set_ftrace_filter file.
CVSS breakdown
CVSS 3.1
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected products
- Canonical / Ubuntu Linux10.10 – 10.10
- Canonical / Ubuntu Linux9.10 – 9.10
- Canonical / Ubuntu Linux10.04 – 10.04
- Linux / Linux kernel2.6.35.5
- SUSE / linux_enterprise_desktop11 – 11
- SUSE / linux_enterprise_high_availability_extension11 – 11
- SUSE / linux_enterprise_server11 – 11
References
- MISChttp://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35.5
- VENDOR_ADVISORYhttp://www.ubuntu.com/usn/USN-1041-1
- MAILING_LISThttp://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html
- MISChttp://www.redhat.com/support/errata/RHSA-2010-0842.html
- VENDOR_ADVISORYhttp://www.vupen.com/english/advisories/2011/0298
- MAILING_LISThttp://lists.opensuse.org/opensuse-security-announce/2010-10/msg00003.html
- MISChttps://bugzilla.redhat.com/show_bug.cgi?id=631623
- VENDOR_ADVISORYhttp://secunia.com/advisories/42758
- MISChttp://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=9c55cb12c1c172e2d51e85fbb5a4796ca86b77e7
- MISChttp://www.securityfocus.com/bid/43684
- VENDOR_ADVISORYhttp://www.vupen.com/english/advisories/2011/0070