Permissions, Privileges, and Access Controls in Linux kernel

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU41140

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2014-3610

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The WRMSR processing functionality in the KVM subsystem in the Linux kernel through 3.17.2 does not properly handle the writing of a non-canonical address to a model-specific register, which allows guest OS users to cause a denial of service (host OS crash) by leveraging guest OS privileges, related to the wrmsr_interception function in arch/x86/kvm/svm.c and the handle_wrmsr function in arch/x86/kvm/vmx.c.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 3.0 - 3.17.1

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:3.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.7:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.9:*:*:*:*:*:*:*

External links

https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=854e8bb1aa06c578c2c9145fa6bfe3680ef63b23
https://lists.opensuse.org/opensuse-security-announce/2015-03/msg00010.html
https://lists.opensuse.org/opensuse-security-announce/2015-03/msg00025.html
https://rhn.redhat.com/errata/RHSA-2015-0869.html
https://www.debian.org/security/2014/dsa-3060
https://www.openwall.com/lists/oss-security/2014/10/24/9
https://www.securityfocus.com/bid/70742
https://www.ubuntu.com/usn/USN-2394-1
https://www.ubuntu.com/usn/USN-2417-1
https://www.ubuntu.com/usn/USN-2418-1
https://www.ubuntu.com/usn/USN-2491-1
https://bugzilla.redhat.com/show_bug.cgi?id=1144883
https://github.com/torvalds/linux/commit/854e8bb1aa06c578c2c9145fa6bfe3680ef63b23

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.