Description
A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (All versions including affected IPv6 stack). 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, allowing attackers to put the function into an infinite loop by supplying arbitrary length values.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_misc
https://cert-portal.siemens.com/productcert/pdf/ssa-248289.pdf
Third Party Advisory, US Government Resource x_refsource_misc
https://us-cert.cisa.gov/ics/advisories/icsa-21-103-05
Vendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-248289.html
Scores
CVSS v3
7.5
EPSS
0.0071
EPSS Percentile
72.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-835
Status
published
Products (5)
siemens/capital_vstar
siemens/nucleus_net
siemens/nucleus_readystart_v3
< 2017.02.4
siemens/nucleus_readystart_v4
< 4.1.0
siemens/nucleus_source_code
Published
Apr 22, 2021
Tracked Since
Feb 18, 2026