CVE-2021-25663: High severity siemens capital vstar vulnerability
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 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.
Other sources
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.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2021-25663?
CVE-2021-25663 is a vulnerability identified in Siemens Capital VSTAR, Nucleus NET, Nucleus ReadyStart V3, Nucleus ReadyStart V4, and Nucleus Source Code, which allows remote attackers to execute arbitrary code.
Which software versions are affected by CVE-2021-25663?
CVE-2021-25663 affects Siemens Capital VSTAR, Nucleus NET, Nucleus ReadyStart V3 (versions < V2017.02.4), Nucleus ReadyStart V4 (versions < V4.1.0), and Nucleus Source Code.
What is the severity of CVE-2021-25663?
CVE-2021-25663 has a severity rating of 7.5 (High).
How can an attacker exploit CVE-2021-25663?
Attackers can exploit CVE-2021-25663 by sending specially crafted packets to the affected software, allowing them to execute arbitrary code.
Are there any references for CVE-2021-25663?
Yes, you can find more information about CVE-2021-25663 at the following references: [Siemens ProductCERT](https://cert-portal.siemens.com/productcert/pdf/ssa-248289.pdf) and [US-CERT Advisory](https://us-cert.cisa.gov/ics/advisories/icsa-21-103-05).