#VU94097 Resource exhaustion in Citrix XenServer and Citrix Hypervisor - CVE-2024-5661

Vulnerability identifier: #VU94097

Vulnerability risk: Medium

CVSSv4.0: 2.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H/E:U/U:Green]

CVE-ID: CVE-2024-5661

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Citrix XenServer
Server applications / Other server solutions
Citrix Hypervisor
Server applications / Virtualization software

Vendor: Citrix

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources. A malicious administrator of the guest OS can perform a denial of service (DoS) attack against the hypervisor.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Citrix XenServer: 8.0

Citrix Hypervisor: 8.2 CU1

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External links
https://support.citrix.com/article/CTX677100/xenserver-and-citrix-hypervisor-security-update-for-cve20245661
https://support.citrix.com/article/CTX677067/hotfix-xs82ecu1068-for-citrix-hypervisor-82-cumulative-update-1

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Q & A

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.