CVE-2021-25664

7.5HIGH

Key Information:

Vendor
Siemens
Status
Capital Embedded Ar Classic 431-422
Capital Embedded Ar Classic R20-11
Nucleus Net
Nucleus Readystart V3
Vendor
CVE Published:
22 April 2021

Summary

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.

Affected Version(s)

Capital Embedded AR Classic 431-422 0

Capital Embedded AR Classic R20-11 0

Nucleus NET All versions

References

https://cert-portal.siemens.com/productcert/pdf/ssa-24828...
x_refsource_MISC
https://us-cert.cisa.gov/ics/advisories/icsa-21-103-05
x_refsource_MISC
https://cert-portal.siemens.com/productcert/html/ssa-2482...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.