Vulnerability identifier: #VU71528
Vulnerability risk: Low
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-399
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 an error when performing Soft Reset with kexec. A malicious guest can continuously execute kexec and prevent further domain administration, like starting new guests or adding/removing resources to or from any existing guest.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Xen: 4.17.0
External links
http://xenbits.xen.org/xsa/advisory-425.html
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.