SB2023101193 - Multiple vulnerabilities in Citrix Hypervisor

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Main Vulnerability Database SB2023101193

SB2023101193 - Multiple vulnerabilities in Citrix Hypervisor

Published: October 11, 2023

Security Bulletin ID SB2023101193
Severity
Medium
Patch available
YES
Number of vulnerabilities 5
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 40% Low 60%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 5 secuirty vulnerabilities.


1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2023-34326)

The vulnerability allows a remote guest to escalate privileges on the system.

The vulnerability exists due to missing IOMMU TLB flushing on x86/AMD systems. A malicious guest can access memory not owned by the guest and escalate privileges on the system.


2) Out-of-bounds write (CVE-ID: CVE-2022-1304)

The vulnerability allows a local attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input. A local attacker can use a specially crafted filesystem, trigger out-of-bounds write and execute arbitrary code on the target system.


3) Deadlock (CVE-ID: CVE-2023-34324)

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

The vulnerability exists due to improper event handling in Linux kernel. A malicious guest can disable paravirtualized device to cause a deadlock in a backend domain (other than dom0).


4) State Issues (CVE-ID: CVE-2023-34327)

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

The vulnerability exists due to improper validation of guest state when using Debug Masks in HVM vCPU. A malicious guest can perform a denial of service (DoS) attack against the guest OS.


5) Division by zero (CVE-ID: CVE-2023-20588)

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a divide by zero error that can return speculative data. A local user can gain access to potentially sensitive information.


Remediation

Install update from vendor's website.

References