Amazon Linux AMI update for open-vm-tools

1) Cryptographic issues

EUVDB-ID: #VU80188

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-20900

CWE-ID: CWE-310 - Cryptographic Issues

Exploit availability: No

Description

The 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.

Mitigation

Update the affected packages:

aarch64:
    open-vm-tools-desktop-debuginfo-12.3.0-1.amzn2023.aarch64
    open-vm-tools-sdmp-debuginfo-12.3.0-1.amzn2023.aarch64
    open-vm-tools-test-debuginfo-12.3.0-1.amzn2023.aarch64
    open-vm-tools-sdmp-12.3.0-1.amzn2023.aarch64
    open-vm-tools-desktop-12.3.0-1.amzn2023.aarch64
    open-vm-tools-debuginfo-12.3.0-1.amzn2023.aarch64
    open-vm-tools-debugsource-12.3.0-1.amzn2023.aarch64
    open-vm-tools-test-12.3.0-1.amzn2023.aarch64
    open-vm-tools-12.3.0-1.amzn2023.aarch64
    open-vm-tools-devel-12.3.0-1.amzn2023.aarch64

src:
    open-vm-tools-12.3.0-1.amzn2023.src

x86_64:
    open-vm-tools-salt-minion-12.3.0-1.amzn2023.x86_64
    open-vm-tools-desktop-debuginfo-12.3.0-1.amzn2023.x86_64
    open-vm-tools-sdmp-debuginfo-12.3.0-1.amzn2023.x86_64
    open-vm-tools-debuginfo-12.3.0-1.amzn2023.x86_64
    open-vm-tools-sdmp-12.3.0-1.amzn2023.x86_64
    open-vm-tools-desktop-12.3.0-1.amzn2023.x86_64
    open-vm-tools-test-debuginfo-12.3.0-1.amzn2023.x86_64
    open-vm-tools-test-12.3.0-1.amzn2023.x86_64
    open-vm-tools-devel-12.3.0-1.amzn2023.x86_64
    open-vm-tools-debugsource-12.3.0-1.amzn2023.x86_64
    open-vm-tools-12.3.0-1.amzn2023.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

open-vm-tools: before 12.3.0-1

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*
• cpe:2.3:a:amazon_web_services:open-vm-tools:*:*:*:*:*:amazon_linux_ami:*:*

External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-350.html

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.