Vulnerability Description
The Linux kernel 2.6.20 and 2.6.21 does not properly handle an invalid LDT segment selector in %cs (the xcs field) during ptrace single-step operations, which allows local users to cause a denial of service (NULL dereference and OOPS) via certain code that makes ptrace PTRACE_SETREGS and PTRACE_SINGLESTEP requests, related to the TRACE_IRQS_ON function, and possibly related to the arch_ptrace function.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | 2.6.20 |
Related Weaknesses (CWE)
References
- http://bugzilla.kernel.org/show_bug.cgi?id=8765Exploit
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%
- http://osvdb.org/37286
- http://secunia.com/advisories/26935
- http://secunia.com/advisories/26955
- http://secunia.com/advisories/26978
- http://secunia.com/advisories/27322
- http://secunia.com/advisories/29159
- http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0094
- http://www.debian.org/security/2007/dsa-1378
- http://www.redhat.com/support/errata/RHSA-2007-0940.html
- http://www.securityfocus.com/archive/1/488972/100/0/threaded
- http://www.securityfocus.com/bid/25801
- http://www.ubuntu.com/usn/usn-518-1
FAQ
What is CVE-2007-3731?
CVE-2007-3731 is a vulnerability with a CVSS score of 4.9 (MEDIUM). The Linux kernel 2.6.20 and 2.6.21 does not properly handle an invalid LDT segment selector in %cs (the xcs field) during ptrace single-step operations, which allows local users to cause a denial of s...
How severe is CVE-2007-3731?
CVE-2007-3731 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2007-3731?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.