#VU13516 Privilege escalation in Linux kernel - CVE-2018-12904
Published: June 29, 2018
Vulnerability identifier: #VU13516
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2018-12904
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local attacker to gain elevated privileges on the target system.
The vulnerability exists due to insufficient checking of the current privilege level (CPL) for Virtual Machine Extensions (VMX) instructions by the arch/x86/kvm/vmx.c source code file when nested virtualization is used. A local attacker can cause a targeted L1 Kernel-based Virtual Machine (KVM) guest to exit and gain elevated privileges on the targeted L1 system, which could be used to conduct further attacks.
Remediation
Install update from vendor's website.