The msr_mtrr_valid function in arch/x86/kvm/mtrr.c in the Linux kernel before 4.6.1 supports MSR 0x2f8, which allows guest OS users to read or write to the kvm_arch_vcpu data structure, and consequently obtain sensitive information or cause a denial of service (system crash), via a crafted ioctl call.
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.1
http://www.openwall.com/lists/oss-security/2016/05/16/2
https://bugzilla.redhat.com/show_bug.cgi?id=1332139
https://github.com/torvalds/linux/commit/9842df62004f366b9fed2423e24df10542ee0dc5
Source: MITRE
Published: 2016-06-27
Updated: 2016-06-27
Type: CWE-284
Base Score: 5.6
Vector: AV:L/AC:L/Au:N/C:P/I:N/A:C
Impact Score: 7.8
Exploitability Score: 3.9
Severity: MEDIUM
Base Score: 7.1
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Impact Score: 5.2
Exploitability Score: 1.8
Severity: HIGH
OR
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to 4.6 (inclusive)
ID | Name | Product | Family | Severity |
---|---|---|---|---|
127146 | NewStart CGSL MAIN 5.04 : kernel Multiple Vulnerabilities (NS-SA-2019-0004) | Nessus | NewStart CGSL Local Security Checks | critical |
124974 | EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1521) | Nessus | Huawei Local Security Checks | critical |
124953 | EulerOS Virtualization 3.0.1.0 : kvm (EulerOS-SA-2019-1450) | Nessus | Huawei Local Security Checks | medium |
119567 | Oracle Linux 6 : Unbreakable Enterprise kernel (ELSA-2018-4301) | Nessus | Oracle Linux Local Security Checks | high |
119535 | Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2018-4300) | Nessus | Oracle Linux Local Security Checks | high |
102511 | Oracle Linux 7 : kernel (ELSA-2017-1842-1) (Stack Clash) | Nessus | Oracle Linux Local Security Checks | critical |
92211 | Fedora 24 : kernel (2016-f8739a80b0) | Nessus | Fedora Local Security Checks | high |
92067 | Fedora 22 : kernel (2016-2363b37a98) | Nessus | Fedora Local Security Checks | high |
92055 | Fedora 23 : kernel (2016-06f1572324) | Nessus | Fedora Local Security Checks | high |
91189 | Ubuntu 14.04 LTS : linux-lts-xenial vulnerabilities (USN-2979-2) | Nessus | Ubuntu Local Security Checks | high |
91188 | Ubuntu 16.04 LTS : linux vulnerabilities (USN-2979-1) | Nessus | Ubuntu Local Security Checks | high |
91186 | Ubuntu 14.04 LTS : linux-lts-wily vulnerabilities (USN-2978-2) | Nessus | Ubuntu Local Security Checks | high |
91185 | Ubuntu 15.10 : linux vulnerabilities (USN-2978-1) | Nessus | Ubuntu Local Security Checks | high |