#VU52217 Infinite loop in Siemens products - CVE-2021-25664
Published: April 14, 2021
Vulnerability identifier: #VU52217
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-25664
CWE-ID: CWE-835
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Nucleus NET
Nucleus ReadyStart
Nucleus Source Code
VSTAR
Nucleus 4
Nucleus NET
Nucleus ReadyStart
Nucleus Source Code
VSTAR
Nucleus 4
Software vendor:
Siemens
Siemens
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the function that processes the hop-by-hop extension header in IPv6 packets and its options lacks any checks against the length field of the header. A remote attacker can consume all available system resources and cause denial of service conditions.
Remediation
Install updates from vendor's website.