Citrix Hypervisor update for Intel firmware
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2023-39368 CVE-2023-38575 CVE-2023-28746 |
| CWE-ID | CWE-693 CWE-200 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Citrix Hypervisor Server applications / Virtualization software |
| Vendor | Citrix |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Protection Mechanism Failure
EUVDB-ID: #VU87495
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-39368
CWE-ID:
CWE-693 - Protection Mechanism Failure
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient implementation of security measures in the bus lock regulator mechanism. A remote attacker can trick the victim to open a specially crafted file and perform a denial of service (DoS) attack.
Install update from vendor's website.
Vulnerable software versionsCitrix Hypervisor: before XS82ECU1040
External linkshttp://support.citrix.com/article/CTX616982
http://support.citrix.com/article/CTX586659/hotfix-xs82ecu1061-for-citrix-hypervisor-82-cumulative-update-1
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.
2) Information disclosure
EUVDB-ID: #VU87490
Risk: Low
CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-38575
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to non-transparent sharing of return predictor targets between contexts in some Intel Processors. A local user can gain unauthorized access to sensitive information on the system.
MitigationInstall update from vendor's website.
Vulnerable software versionsCitrix Hypervisor: before XS82ECU1040
External linkshttp://support.citrix.com/article/CTX616982
http://support.citrix.com/article/CTX586659/hotfix-xs82ecu1061-for-citrix-hypervisor-82-cumulative-update-1
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.
3) Information disclosure
EUVDB-ID: #VU87457
Risk: Low
CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-28746
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to information exposure through microarchitectural state after transient execution from some register files for some Intel Atom Processors. A local user can gain access to sensitive information.
Install update from vendor's website.
Vulnerable software versionsCitrix Hypervisor: before XS82ECU1040
External linkshttp://support.citrix.com/article/CTX616982
http://support.citrix.com/article/CTX586659/hotfix-xs82ecu1061-for-citrix-hypervisor-82-cumulative-update-1
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.
