Race condition in Xen - CVE-2020-25599
Published: September 23, 2020
Vulnerability identifier: #VU46983
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Amber
CVE-ID: CVE-2020-25599
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Xen Project
Affected software:
Xen
Xen
Detailed vulnerability description
The vulnerability allows a remote user to escalate privileges on the system.
The vulnerability exists due to a race condition caused by uses of EVTCHNOP_reset (potentially by a guest on itself) or XEN_DOMCTL_soft_reset (by itself covered by XSA-77). A remote user on the PV guest can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the host system.
How to mitigate CVE-2020-25599
Install updates from vendor's website.