Vulnerability identifier: #VU81903
Vulnerability risk: Medium
CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-371
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Xen
Server applications /
Virtualization software
Vendor: Xen Project
Description
The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.
The vulnerability exists due to improper validation of guest state in PV vCPU. A malicious guest place a breakpoint over the live GDT and perform a denial of service (DoS) attack against the host.Mitigation
Install updates from vendor's website.
Vulnerable software versions
Xen: All versions
External links
http://xenbits.xen.org/xsa/advisory-444.html
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.