Improper Null Termination in Siemens products - CVE-2021-31884
Published: November 10, 2021
Vulnerability identifier: #VU58084
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-31884
CWE-ID: CWE-170
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Siemens
Affected software:
Nucleus NET
Nucleus Source Code
Capital VSTAR
Nucleus ReadyStart
Nucleus NET
Nucleus Source Code
Capital VSTAR
Nucleus ReadyStart
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the system.
The vulnerability exists due to the DHCP client application assumes the data supplied with the “hostname” DHCP option NULL is terminated. A remote attacker on the local network can execute arbitrary code on the target system.
How to mitigate CVE-2021-31884
Install updates from vendor's website.