Debian update for open-vm-tools
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2023-20867 CVE-2023-20900 |
| CWE-ID | CWE-287 CWE-310 |
| Exploitation vector | Local network |
| Public exploit | Vulnerability #1 is being exploited in the wild. |
| Vulnerable software Subscribe |
Debian Linux Operating systems & Components / Operating system open-vm-tools (Debian package) Operating systems & Components / Operating system package or component |
| Vendor | Debian |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Improper Authentication
EUVDB-ID: #VU77208
Risk: High
CVSSv3.1: 7.8 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]
CVE-ID: CVE-2023-20867
CWE-ID:
CWE-287 - Improper Authentication
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error in the vgauth module. An attacker who compromised the ESXi host can bypass authentication process and execute privileged commands across Windows, Linux, and PhotonOS (vCenter) guest VMs without authentication of guest credentials from a compromised ESXi host and no default logging on guest VMs.
Note, the vulnerability is being actively exploited in the wild by the UNC3886 APT actor.
Update open-vm-tools package to one of the following versions: 2:11.2.5-2+deb11u2, 2:12.2.0-1+deb12u1.
Vulnerable software versionsDebian Linux: All versions
open-vm-tools (Debian package): before 2:12.2.0-1+deb12u1
External linkshttp://www.debian.org/security/2023/dsa-5493
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?
Yes. This vulnerability is being exploited in the wild.
2) Cryptographic issues
EUVDB-ID: #VU80188
Risk: Medium
CVSSv3.1: 5.9 [CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-20900
CWE-ID:
CWE-310 - Cryptographic Issues
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to improper verification of SAML token signature. A remote attacker can bypass SAML token signature verification and perform man-in-the-middle (MITM) network positioning between vCenter server and the virtual machine.
MitigationUpdate open-vm-tools package to one of the following versions: 2:11.2.5-2+deb11u2, 2:12.2.0-1+deb12u1.
Vulnerable software versionsDebian Linux: All versions
open-vm-tools (Debian package): before 2:12.2.0-1+deb12u1
External linkshttp://www.debian.org/security/2023/dsa-5493
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
