Denial of service in Xenstore via soft reset



Published: 2023-01-25
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-42330
CWE-ID CWE-399
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Xen
Server applications / Virtualization software

Vendor Xen Project

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Resource management error

EUVDB-ID: #VU71528

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2022-42330

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

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

CPE2.3 External links

http://xenbits.xen.org/xsa/advisory-425.html

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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