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CVE-2007-3731

Date: September 17, 2007

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.

Severity Score

6.2

Related Resources (22)

Url: http://www.securityfocus.com/bid/25801

Url: http://www.ubuntu.com/usn/usn-518-1

Url: https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10394

Url: http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0094

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

Url: https://access.redhat.com/security/cve/CVE-2007-3731

Url: http://www.redhat.com/support/errata/RHSA-2007-0940.html

Url: http://www.debian.org/security/2007/dsa-1378

Url: https://issues.rpath.com/browse/RPL-2304

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2007-3731

Url: http://bugzilla.kernel.org/show_bug.cgi?id=8765

Url: https://bugzilla.redhat.com/show_bug.cgi?id=248324

Url: http://secunia.com/advisories/26935

Url: http://secunia.com/advisories/26978

Url: http://www.securityfocus.com/archive/1/488972/100/0/threaded

Url: http://secunia.com/advisories/26955

Url: http://osvdb.org/37286

Url: https://nvd.nist.gov/vuln/detail/CVE-2007-3731

Url: http://secunia.com/advisories/27322

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

Url: http://secunia.com/advisories/29159

Url: https://www.mend.io/vulnerability-database/CVE-2007-3731

Severity Score

6.2

Weakness Type (CWE)

Input Validation

CWE-20

CVSS v3.1

Base Score:	6.2
Attack Vector (AV):	LOCAL
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	HIGH

CVSS v2

Base Score:	4.9
Access Vector (AV):	LOCAL
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	COMPLETE
Additional information:

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CVE-2007-3731

Date: September 17, 2007

Severity Score

Related Resources (22)

Severity Score

Weakness Type (CWE)

CVSS v3.1

CVSS v2

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