Multiple vulnerabilities in XenServer and Citrix Hypervisor
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2024-45817 CVE-2022-24805 CVE-2022-24809 |
| CWE-ID | CWE-833 CWE-787 CWE-476 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Citrix XenServer Server applications / Other server solutions Citrix Hypervisor Server applications / Virtualization software |
| Vendor | Citrix |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Deadlock
EUVDB-ID: #VU97680
Risk: Low
CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2024-45817
CWE-ID:
CWE-833 - Deadlock
Exploit availability: No
DescriptionThe 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.
MitigationInstall update from vendor's website.
Vulnerable software versionsCitrix XenServer: 8.0
Citrix Hypervisor: before XS82ECU1077
CPE2.3- cpe:2.3:a:citrix:citrix_xenserver:8.0:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:citrix_hypervisor:*:*:*:*:*:*:*:*
https://support.citrix.com/article/CTX691646
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.
2) Out-of-bounds write
EUVDB-ID: #VU65671
Risk: Medium
CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2022-24805
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: No
DescriptionThe 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.
MitigationInstall update from vendor's website.
Vulnerable software versionsCitrix XenServer: 8.0
Citrix Hypervisor: before XS82ECU1077
CPE2.3- cpe:2.3:a:citrix:citrix_xenserver:8.0:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:citrix_hypervisor:*:*:*:*:*:*:*:*
https://support.citrix.com/article/CTX691646
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) NULL pointer dereference
EUVDB-ID: #VU65672
Risk: Low
CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2022-24809
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe 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.
MitigationInstall update from vendor's website.
Vulnerable software versionsCitrix XenServer: 8.0
Citrix Hypervisor: before XS82ECU1077
CPE2.3- cpe:2.3:a:citrix:citrix_xenserver:8.0:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:citrix_hypervisor:*:*:*:*:*:*:*:*
https://support.citrix.com/article/CTX691646
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.
