Improper Null Termination in Siemens products - CVE-2021-31887
Published: November 10, 2021
Vulnerability identifier: #VU58087
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-31887
CWE-ID: CWE-170
Exploitation vector: Remote access
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 improper null termination when the FTP server does not properly validate the length of the “PWD/XPWD” command. A remote authenticated attacker can execute arbitrary code on the target system.
How to mitigate CVE-2021-31887
Install updates from vendor's website.