CVE-2021-25663 Information

Description

A vulnerability has been identified in Capital VSTAR (Versions including affected IPv6 stack) Nucleus NET (All versions) Nucleus ReadyStart V3 (All versions < V2017.02.4) Nucleus ReadyStart V4 (All versions < V4.1.0) Nucleus Source Code (Versions including affected IPv6 stack). The function that processes IPv6 headers does not check the lengths of extension header options allowing attackers to put this function into an infinite loop with crafted length values.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://cert-portal.siemens.com/productcert/pdf/ssa-248289.pdf https://us-cert.cisa.gov/ics/advisories/icsa-21-103-05

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5