CVEvulnerability
CVE-2020-35684
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 HCC Nichestack 3.0. The code that parses TCP packets relies on an unchecked value of the IP payload size (extracted from the IP header) to compute the length of the TCP payload within the TCP checksum computation function. When the IP payload size is set to be smaller than the size of the IP header, the TCP checksum computation function may read out of bounds (a low-impact write-out-of-bounds is also possible).
Affected configurations
• hcc-embedded nichestack 3.0
• 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.hcc-embedded.com Product
- 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.hcc-embedded.com Product
- https://www.kb.cert.org/vuls/id/608209 Third Party Advisory, US Government Resource