Debian DSA-1962-1 : kvm - several vulnerabilities

high Nessus Plugin ID 44827

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Synopsis

The remote Debian host is missing a security-related update.

Description

Several vulnerabilities have been discovered in kvm, a full virtualization system. The Common Vulnerabilities and Exposures project identifies the following problems :

- CVE-2009-3638 It was discovered an Integer overflow in the kvm_dev_ioctl_get_supported_cpuid function. This allows local users to have an unspecified impact via a KVM_GET_SUPPORTED_CPUID request to the kvm_arch_dev_ioctl function.

- CVE-2009-3722 It was discovered that the handle_dr function in the KVM subsystem does not properly verify the Current Privilege Level (CPL) before accessing a debug register, which allows guest OS users to cause a denial of service (trap) on the host OS via a crafted application.

- CVE-2009-4031 It was discovered that the do_insn_fetch function in the x86 emulator in the KVM subsystem tries to interpret instructions that contain too many bytes to be valid, which allows guest OS users to cause a denial of service (increased scheduling latency) on the host OS via unspecified manipulations related to SMP support.

Solution

Upgrade the kvm package.

For the stable distribution (lenny), these problems have been fixed in version 72+dfsg-5~lenny4.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=557739

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=562075

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=562076

https://security-tracker.debian.org/tracker/CVE-2009-3638

https://security-tracker.debian.org/tracker/CVE-2009-3722

https://security-tracker.debian.org/tracker/CVE-2009-4031

https://www.debian.org/security/2009/dsa-1962

Plugin Details

Severity: High

ID: 44827

File Name: debian_DSA-1962.nasl

Version: 1.11

Type: local

Agent: unix

Published: 2/24/2010

Updated: 1/4/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.8

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:kvm, cpe:/o:debian:debian_linux:5.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Patch Publication Date: 12/23/2009

Reference Information

CVE: CVE-2009-3638, CVE-2009-3722, CVE-2009-4031

DSA: 1962

CWE: 20, 189, 264