QEMU translation block buffer denial of service

qemu-translationblock-dos (38806)

Low Risk

Description:

QEMU is vulnerable to a denial of service, caused by improper bounds checking by the translation block. A local attacker could exploit this vulnerability to cause a denial of service.

*CVSS:

Base Score:	2.1
Access Vector:	Local
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Partial
Temporal Score:	1.7
Exploitability:	Unproven
Remediation Level:	Unavailable
Report Confidence:	Uncorroborated

Consequences:

Denial of Service

Remedy:

Apply the appropriate patch for your system. See References.

References:

• BugTraq Mailing List, Fri Nov 30 2007 - 10:26:53 CST : QEMU code_gen_buffer overflow POC.
• QEMU Web site: QEMU.
• BID-26666: QEMU Translation Block Local Denial of Service Vulnerability
• CVE-2007-6227: QEMU 0.9.0 allows local users of a Windows XP SP2 guest operating system to overwrite the TranslationBlock (code_gen_buffer) buffer, and probably have unspecified other impacts related to an overflow
• MDVSA-2008:162: qemu
• SA29129: KVM Block Device Backend Security Bypass

Platforms Affected:

• Fabrice Bellard QEMU 0.9.0
• MandrakeSoft Mandrake Linux 2008.0
• MandrakeSoft Mandrake Linux 2008.0 X86_64
• MandrakeSoft Mandrake Linux 2008.1
• MandrakeSoft Mandrake Linux 2008.1 X86_64

Reported:

Nov 30, 2007

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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.

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