SB2024092464 - Multiple vulnerabilities in XenServer and Citrix Hypervisor

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Deadlock (CVE-ID: CVE-2024-45817)

The vulnerability allows a local user to perform a denial of service attack (DoS) on the target system.

The vulnerability exists due to a deadlock within the vlapic_error() function. A buggy or malicious HVM or PVH guest can deadlock Xen and perform a denial of service attack.

2) Out-of-bounds write (CVE-ID: CVE-2022-24805)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when handling INDEX of NET-SNMP-VACM-MIB. A remote attacker can trick the victim into loading a specially crafted MIB collection, trigger an out-of-bounds write and execute arbitrary code on the target system.

3) NULL pointer dereference (CVE-ID: CVE-2022-24809)

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

The vulnerability exists due to a NULL pointer dereference error in nsVacmAccessTable  when handling malformed OID in GET-NEXT. A remote user can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://support.citrix.com/article/CTX691646