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Vulnerability Details : CVE-2009-4004

Buffer overflow in the kvm_vcpu_ioctl_x86_setup_mce function in arch/x86/kvm/x86.c in the KVM subsystem in the Linux kernel before 2.6.32-rc7 allows local users to cause a denial of service (memory corruption) or possibly gain privileges via a KVM_X86_SETUP_MCE IOCTL request that specifies a large number of Machine Check Exception (MCE) banks.
Publish Date : 2009-11-20 Last Update Date : 2020-08-12
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of ServiceOverflowGain privilegesMemory corruption
CWE ID 119

- Vendor Statements

Not vulnerable. This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 3, 4, and Red Hat Enterprise MRG as KVM (Kernel-based Virtual Machine) is only supported in Red Hat Enterprise Linux 5. Red Hat Enterprise Linux 5 is not vulnerable to this issue because it does not include the change that introduced this buffer overflow vulnerability.
Source: Redhat

- Products Affected By CVE-2009-4004

# Product Type Vendor Product Version Update Edition Language
1 OS Linux Linux Kernel * * * * Version Details Vulnerabilities
2 OS Linux Linux Kernel 2.6.32 RC6 * * Version Details Vulnerabilities
3 OS Linux Linux Kernel 2.6.32 RC1 * * Version Details Vulnerabilities
4 OS Linux Linux Kernel 2.6.32 RC2 * * Version Details Vulnerabilities
5 OS Linux Linux Kernel 2.6.32 RC3 * * Version Details Vulnerabilities
6 OS Linux Linux Kernel 2.6.32 RC4 * * Version Details Vulnerabilities
7 OS Linux Linux Kernel 2.6.32 RC5 * * Version Details Vulnerabilities
8 OS Linux Linux Kernel 2.6.32 - * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Linux Linux Kernel 8

- References For CVE-2009-4004;a=commit;h=a9e38c3e01ad242fe2a625354cf065c34b01e3aa CONFIRM
XF kernel-kvmvcpuioctl-privilege-escalation(54302)
VUPEN ADV-2009-3267
BID 37035 Linux Kernel KVM 'KVM_MAX_MCE_BANKS' Memory Corruption Vulnerability Release Date:2009-11-16

- Metasploit Modules Related To CVE-2009-4004

There are not any metasploit modules related to this CVE entry (Please visit for more information)

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