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4.9
CVSSv2

CVE-2007-3731

Published: 17/09/2007 Updated: 13/02/2023
CVSS v2 Base Score: 4.9 | Impact Score: 6.9 | Exploitability Score: 3.9
VMScore: 437
Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C
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Vulnerability Summary

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.

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linux linux kernel 2.6.21

linux linux kernel 2.6.20

Vendor Advisories

Ubuntu Security Notice: linux-source-2.6.15, linux-source-2.6.17, linux-source-2.6.20 vulnerabilities
Evan Teran discovered that the Linux kernel ptrace routines did not correctly handle certain requests robustly Local attackers could exploit this to crash the system, causing a denial of service (CVE-2007-3731) ...
Debian Security Advisories: DSA-1378-2 linux-2.6 -- several vulnerabilities
Several local and remote vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2007-3731 Evan Teran discovered a potential local denial of service (oops) in the handling of PTRA ...

References

CWE-20http://bugzilla.kernel.org/show_bug.cgi?id=8765https://bugzilla.redhat.com/show_bug.cgi?id=248324http://www.debian.org/security/2007/dsa-1378http://www.redhat.com/support/errata/RHSA-2007-0940.htmlhttp://www.ubuntu.com/usn/usn-518-1http://www.securityfocus.com/bid/25801http://secunia.com/advisories/26935http://secunia.com/advisories/26955http://secunia.com/advisories/26978http://secunia.com/advisories/27322http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0094https://issues.rpath.com/browse/RPL-2304http://secunia.com/advisories/29159http://osvdb.org/37286https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10394http://www.securityfocus.com/archive/1/488972/100/0/threadedhttp://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=29eb51101c02df517ca64ec472d7501127ad1da8http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=a10d9a71bafd3a283da240d2868e71346d2aef6fhttps://nvd.nist.govhttps://usn.ubuntu.com/518-1/
CVSSv2
CVSSv2
CVSSv3
VMScore
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