Multiple vulnerabilities in Red Hat Virtualization
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2020-25717 CVE-2021-4034 |
| CWE-ID | CWE-264 CWE-20 |
| Exploitation vector | Network |
| Public exploit | Vulnerability #2 is being exploited in the wild. |
| Vulnerable software |
redhat-virtualization-host (Red Hat package) Operating systems & Components / Operating system package or component redhat-release-virtualization-host (Red Hat package) Operating systems & Components / Operating system package or component Red Hat Virtualization Host Web applications / Remote management & hosting panels Red Hat Virtualization Server applications / Virtualization software |
| Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Permissions, Privileges, and Access Controls
EUVDB-ID: #VU58097
Risk: Medium
CVSSv4.0: 6.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-25717
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to the Windows Active Directory (AD) domains have by default a feature to allow users to create computer accounts. A remote authenticated attacker can create such account with elevated privileges on the system.
MitigationInstall updates from vendor's website.
redhat-virtualization-host (Red Hat package): 4.3.11-20200922.0.el7_9 - 4.3.20-20211202.1.el7_9
redhat-release-virtualization-host (Red Hat package): 4.3.4-1.el7ev - 4.3.20-1.el7ev
Red Hat Virtualization Host: 4
Red Hat Virtualization: 4
CPE2.3- cpe:2.3:a:red_hat:redhat-virtualization-host_redhat_package:4.3.11-20200922.0.el7_9:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-virtualization-host_redhat_package:4.3.12-20201216.0.el7_9:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-virtualization-host_redhat_package:4.3.13-20210127.0.el7_9:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-release-virtualization-host_redhat_package:4.3.4-1.el7ev:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-release-virtualization-host_redhat_package:4.3.5-2.el7ev:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-release-virtualization-host_redhat_package:4.3.5-4.el7ev:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:red_hat_virtualization_host:4:*:*:*:*:*:*:*
- cpe:2.3:a:red_hat:red_hat_virtualization:4:*:*:*:*:*:*:*
https://access.redhat.com/errata/RHSA-2022:0443
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.
2) Input validation error
EUVDB-ID: #VU60007
Risk: Medium
CVSSv4.0: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Green]
CVE-ID: CVE-2021-4034
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: Yes
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improper handling of the calling parameters count in the pkexec setuid binary, which causes the binary to execute environment variables as commands. A local user can craft environment variables in a way that they will be processed and executed by pkexec and execute arbitrary commands on the system as root.
Install updates from vendor's website.
redhat-virtualization-host (Red Hat package): 4.3.11-20200922.0.el7_9 - 4.3.20-20211202.1.el7_9
redhat-release-virtualization-host (Red Hat package): 4.3.4-1.el7ev - 4.3.20-1.el7ev
Red Hat Virtualization Host: 4
Red Hat Virtualization: 4
CPE2.3- cpe:2.3:a:red_hat:redhat-virtualization-host_redhat_package:4.3.11-20200922.0.el7_9:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-virtualization-host_redhat_package:4.3.12-20201216.0.el7_9:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-virtualization-host_redhat_package:4.3.13-20210127.0.el7_9:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-release-virtualization-host_redhat_package:4.3.4-1.el7ev:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-release-virtualization-host_redhat_package:4.3.5-2.el7ev:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-release-virtualization-host_redhat_package:4.3.5-4.el7ev:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:red_hat_virtualization_host:4:*:*:*:*:*:*:*
- cpe:2.3:a:red_hat:red_hat_virtualization:4:*:*:*:*:*:*:*
https://access.redhat.com/errata/RHSA-2022:0443
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. However, proof of concept for this vulnerability is available.
