Citrix Hypervisor update for Xen

1) Input validation error

EUVDB-ID: #VU85682

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-46838

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of network packets at the backend. An unprivileged guest can send zero-length packets to the OS kernel and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Citrix Hypervisor: 8.2 CU1

External links

http://support.citrix.com/article/CTX587605
http://support.citrix.com/article/CTX586901

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.