Multiple vulnerabilities in VMware ESXi
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2020-3981 CVE-2020-3982 CVE-2020-3992 CVE-2020-3995 |
| CWE-ID | CWE-125 CWE-787 CWE-416 CWE-401 |
| Exploitation vector | Network |
| Public exploit | Vulnerability #3 is being exploited in the wild. |
| Vulnerable software Subscribe |
VMware ESXi Operating systems & Components / Operating system |
| Vendor | VMware, Inc |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
1) Out-of-bounds read
EUVDB-ID: #VU47748
Risk: Medium
CVSSv3.1: 5.4 [CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-3981
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition due to a time-of-check time-of-use issue in ACPI device within the implementation of the BDOOR_CMD_PATCH_ACPI_TABLES command. A remote administrator on a guest OS can run a specially crafted program to read memory from the vmx process.
MitigationInstall updates from vendor's website.
Vulnerable software versionsVMware ESXi: 6.5 - ESXi_7.0.0-1.20.16321839
External linkshttp://www.vmware.com/security/advisories/VMSA-2020-0023.html
http://www.zerodayinitiative.com/advisories/ZDI-20-1269/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated privileged user via the local network (LAN).
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: #VU47749
Risk: High
CVSSv3.1: 7.3 [CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-3982
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 caused by a time-of-check time-of-use issue in ACPI device within the implementation of the BDOOR_CMD_PATCH_ACPI_TABLES command. A remote administrator on the guest OS can run a specially crafted program to trigger a heap-based buffer overflow and crash the system or execute arbitrary code on the hypervisor.
MitigationInstall updates from vendor's website.
Vulnerable software versionsVMware ESXi: 6.5 - ESXi_7.0.0-1.20.16321839
External linkshttp://www.vmware.com/security/advisories/VMSA-2020-0023.html
http://www.zerodayinitiative.com/advisories/ZDI-20-1268/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated privileged user via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Use-after-free
EUVDB-ID: #VU47750
Risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-3992
CWE-ID:
CWE-416 - Use After Free
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error within the OpenSLP service. A remote attacker can can send specially crafted SLP message to port 427/udp, trigger a use-after-free error and execute arbitrary code on the system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsVMware ESXi: 6.5 - ESXi_7.0.0-1.20.16321839
External linkshttp://www.vmware.com/security/advisories/VMSA-2020-0023.html
http://www.zerodayinitiative.com/advisories/ZDI-20-1269/
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.
4) Memory leak
EUVDB-ID: #VU47751
Risk: High
CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-3995
CWE-ID:
CWE-401 - Missing release of memory after effective lifetime
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due memory leak within the VMCI host driver. A remote attacker can force the application to leak memory and perform denial of service attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsVMware ESXi: 6.5 - ESXi670-202006401-SG
External linkshttp://www.vmware.com/security/advisories/VMSA-2020-0023.html
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.
