CVE-2007-3731

Linux Kernel - Improper Input Validation

Title source: rule

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.

References (18)

[Exploit] http://bugzilla.kernel.org/show_bug.cgi?id=8765

[Patch] http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=29eb51101c02df517ca64ec472d7501127ad1da8

[Patch] http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=a10d9a71bafd3a283da240d2868e71346d2aef6f

[Third Party Advisory, VDB Entry] http://osvdb.org/37286

[Vendor Advisory] http://www.redhat.com/support/errata/RHSA-2007-0940.html

[Vendor Advisory] http://www.ubuntu.com/usn/usn-518-1

[Patch] https://bugzilla.redhat.com/show_bug.cgi?id=248324

[Issue Tracking] https://issues.rpath.com/browse/RPL-2304

[Third Party Advisory, VDB Entry] https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10394

[Third Party Advisory] http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0094

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/archive/1/488972/100/0/threaded

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/25801

[Third Party Advisory] http://www.debian.org/security/2007/dsa-1378

[Third Party Advisory] http://secunia.com/advisories/26935

[Third Party Advisory] http://secunia.com/advisories/26955

[Third Party Advisory] http://secunia.com/advisories/26978

[Third Party Advisory] http://secunia.com/advisories/27322

[Third Party Advisory] http://secunia.com/advisories/29159

Scores

EPSS 0.0011

EPSS Percentile 29.5%

Classification

CWE

CWE-20

Status draft

Affected Products (2)

linux/linux_kernel

linux/linux_kernel

Timeline

Published Sep 17, 2007

Tracked Since Feb 18, 2026