Permissions, Privileges, and Access Controls in Xen - CVE-2019-17347
Published: March 5, 2019 / Updated: July 28, 2020
Vulnerability identifier: #VU17900
CSH Severity: Low
CVSS v4.0: 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:U/U:Clear
CVE-ID: CVE-2019-17347
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Xen Project
Affected software:
Xen
Xen
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the guest system.
The vulnerability exists due to incorrect implementation of the hardware supported fsgsbase feature. A local user or process on 64bit PV guest system can execute arbitrary code on the guest operating system with escalated privileges.
This vulnerability affects 64bit systems that are running on Intel IvyBridge and later hardware, and AMD Steamroller and later hardware.
How to mitigate CVE-2019-17347
Apply the following patches: