SB2022021512 - Multiple vulnerabilities in VMWare Cloud Foundation (ESXi)
Published: February 15, 2022
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2021-22040)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote user to compromise the affected system.
The vulnerability exists due to a use-after-free error in the XHCI USB controller. A remote user with administrative permissions on the guest OS can trigger a use-after-free error and execute arbitrary code as the virtual machine's VMX process running on the host.
Successful exploitation of the vulnerability may allow an attacker to compromise the hypervisor.
2) Race condition (CVE-ID: CVE-2021-22041)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote user to escalate privileges on the system.
The vulnerability exists due to a double-fetch vulnerability in the UHCI USB controller. A remote user with administrative permissions on the guest OS can
trigger a race condition and execute arbitrary code as the virtual
machine's VMX process running on the host.
Successful exploitation of the vulnerability may allow an attacker to compromise the hypervisor.
3) Improper access control (CVE-ID: CVE-2021-22042)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to VMX having access to settingsd authorization tickets. A local user with privileges within the VMX process only can access settingsd service running as a high privileged user.
4) Time-of-check Time-of-use (TOCTOU) Race Condition (CVE-ID: CVE-2021-22043)
CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
CVSSv4: 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:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a Time-of-check Time-of-use vulnerability when handling temporary files. A local user with access to settingsd can escalate privileges on the system.
5) Resource management error (CVE-ID: CVE-2021-22050)
CWE-ID: CWE-399 - Resource Management Errors
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources within rhttpproxy. A remote attacker can send crafted slow HTTP POST request to the system and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.