Description
An 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.)
Published: 2021-08-19
Score: 9.1 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
EUVD EUVD EUVD-2020-23344 An 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.)
History

No history.

Subscriptions

Hcc-embedded Nichestack
Siemens Sentron 3wa Com190 Sentron 3wa Com190 Firmware Sentron 3wl Com35 Sentron 3wl Com35 Firmware
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-04T17:09:14.933Z

Reserved: 2020-12-24T00:00:00.000Z

Link: CVE-2020-35685

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-08-19T12:15:08.217

Modified: 2024-11-21T05:27:50.993

Link: CVE-2020-35685

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses