FreeBSD PT_LWPINFO ptrace denial of service

freebsd-ptlwpinfo-ptrace-dos (29476)

Medium Risk

Description:

FreeBSD is vulnerable to a denial of service caused by a signedness error in the PT_LWPINFO ptrace command. A local attacker could exploit this vulnerability to possibly corrupt user-space memory or cause a kernel panic, resulting in a denial of service.

*CVSS:

Base Score:	3.5
Access Vector:	Local
Access Complexity:	Low
Authentication:	Not Required
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Complete
Temporal Score:	2.8
Exploitability:	Unproven
Remediation Level:	Unavailable
Report Confidence:	Uncorroborated

Consequences:

Denial of Service

Remedy:

No remedy available as of July 9, 2011.

References:

• iDefense Labs PUBLIC ADVISORY: 10.10.06: FreeBSD ptrace PT_LWPINFO Denial of Service Vulnerability.
• BID-20440: FreeBSD PTrace PT_LWPINFO Local Denial of Service Vulnerability
• CVE-2006-4516: Integer signedness error in FreeBSD 6.0-RELEASE allows local users to cause a denial of service (memory corruption and kernel panic) via a PT_LWPINFO ptrace command with a large negative data value that satisfies a signed maximum value check but is used in an unsigned copyout function call.
• SA22367: FreeBSD "PT_LWPINFO" Ptrace Command Denial of Service

Platforms Affected:

Reported:

Oct 10, 2006

The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

For corrections or additions please email xforce@iss.net

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

About IBM Internet Security Systems

IBM Internet Security Systems is a trusted security advisor to thousands of the world's leading businesses and governments, helping to provide pre-emptive protection for networks, desktops and servers. The IBM Proventia? integrated security platform is designed to automatically protect against both known and unknown threats, helping to keep networks up and running and shield customers from online attacks before they impact business assets. IBM Internet Security Systems products and services are based on the proactive security intelligence of its X-Force? research and development team ? an unequivocal world authority in vulnerability and threat research. The IBM Internet Security Systems product line is also complemented by comprehensive Managed Security Services and Professional Security Services. For more information, visit the IBM Internet Security Systems Web site at www.iss.net or call 800-776-2362.