Denial of service in Xen Shadow Stacks



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2023-46841
CWE-ID CWE-399
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Xen
Server applications / Virtualization software

Vendor Xen Project

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Resource management error

EUVDB-ID: #VU86860

Risk: Medium

CVSSv4.0: 5.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/U:Green]

CVE-ID: CVE-2023-46841

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote guest to perform a denial of service (DoS) attack.

The vulnerability exists due to incorrect implementation of the Shadow Stacks (CET-SS) feature. An unprivileged guest can cause a hypervisor crash, causing a Denial of Service (DoS) of the entire host.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Xen: All versions

CPE2.3 External links

https://xenbits.xen.org/xsa/advisory-451.html


Q & A

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.



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