SB2016062714 - Permissions, privileges, and access controls in Linux kernel x86 kvm
Published: June 27, 2016
Security Bulletin ID
SB2016062714
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Permissions, privileges, and access controls (CVE-ID: CVE-2016-4440)
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to permissions, privileges, and access controls error within the vmx_set_msr_bitmap(), vmx_refresh_apicv_exec_ctrl() and hardware_setup() functions in arch/x86/kvm/vmx.c. A local user can execute arbitrary code.
Remediation
Install update from vendor's website.
References
- https://github.com/torvalds/linux/commit/3ce424e45411cf5a13105e0386b6ecf6eeb4f66f
- http://www.openwall.com/lists/oss-security/2016/05/20/2
- https://bugzilla.redhat.com/show_bug.cgi?id=1337806
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3ce424e45411cf5a13105e0386b6ecf6eeb4f66f