IPv6 Header Processing Vulnerability in Siemens Capital VSTAR and Nucleus Products

CVE-2021-25663

What is CVE-2021-25663?

A vulnerability has been reported in Siemens Capital VSTAR and other Nucleus products that affects the processing of IPv6 headers. Specifically, the issue arises from the lack of proper validation of extension header option lengths, potentially allowing an attacker to exploit this weakness. By crafting malicious length values, an attacker can cause the function that processes these headers to enter an infinite loop, which could lead to denial of service and disruption of service availability across affected systems.

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