CVEvulnerability
CVE-2021-31401
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-08-19
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-20
Description
An issue was discovered in tcp_rcv() in nptcp.c in HCC embedded InterNiche 4.0.1. The TCP header processing code doesn't sanitize the value of the IP total length field (header length + data length). With a crafted IP packet, an integer overflow occurs whenever the value of the IP data length is calculated by subtracting the length of the header from the total length of the IP packet.
Affected configurations
• hcc-embedded nichestack (< 4.3)
• siemens sentron 3wl com35 firmware (< 1.2.0)
• siemens sentron 3wa com190 firmware (< 2.0.0)
Related
Weakness · CWE (1)
- CWE-20 Improper Input Validation weakness
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-789208.pdf Mitigation, Third Party Advisory
- https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/ Mitigation, Third Party Advisory
- https://www.kb.cert.org/vuls/id/608209 Third Party Advisory, US Government Resource
- https://cert-portal.siemens.com/productcert/pdf/ssa-789208.pdf Mitigation, Third Party Advisory
- https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/ Mitigation, Third Party Advisory
- https://www.kb.cert.org/vuls/id/608209 Third Party Advisory, US Government Resource