CVE-2020-35685

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Summary

CVECVE-2020-35685
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-08-19 12:15:00 UTC
Updated2021-08-26 18:21:00 UTC
DescriptionAn issue was discovered in HCC Nichestack 3.0. The code that generates Initial Sequence Numbers (ISNs) for TCP connections derives the ISN from an insufficiently random source. As a result, an attacker may be able to determine the ISN of current and future TCP connections and either hijack existing ones or spoof future ones. (Proper ISN generation should aim to follow at least the specifications outlined in RFC 6528.)

Risk And Classification

Problem Types: CWE-330

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Hcc-embedded Nichestack 3.0 All All All
Hardware Siemens Sentron 3wa Com190 - All All All
Operating System Siemens Sentron 3wa Com190 Firmware All All All All
Hardware Siemens Sentron 3wl Com35 - All All All
Operating System Siemens Sentron 3wl Com35 Firmware All All All All

References

ReferenceSourceLinkTags
Home - Embedded Software and Systems MISC www.hcc-embedded.com
cert-portal.siemens.com/productcert/pdf/ssa-789208.pdf CONFIRM cert-portal.siemens.com
New Critical Operational Technology Vulnerabilities Found on NicheStack – Mitigation Advised - Forescout MISC www.forescout.com
VU#608209 - NicheStack embedded TCP/IP has vulnerabilities CERT-VN www.kb.cert.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 590508 Siemens Interniche IP-Stack Multiple Vulnerabilities (SSA-789208)
  • 590785 Schneider Electric Lexium ILE ILA ILS and Altivar Multiple Vulnerabilities (SEVD-2021-217-01)
  • 591068 Rockwell Automation Products INFRA:HALT Interniche Multiple Vulnerabilities (PN1575)

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