PatchSiren cyber security CVE debrief

CVE-2024-35210 Siemens CVE debrief

A medium-severity vulnerability in Siemens SINEC Traffic Analyzer (6GK8822-1BG01-0BA0) allows downgrade attacks due to missing HTTP Strict Transport Security (HSTS) enforcement on the affected web server. Published 2024-06-11 and last modified 2025-05-06, this issue could expose confidential information if an attacker successfully intercepts and downgrades HTTPS connections. The vulnerability requires local network access with low attack complexity and no privileges, but no user interaction is needed. Siemens has released a vendor fix in version 1.2 or later.

Vendor: Siemens
Product: SINEC Traffic Analyzer (6GK8822-1BG01-0BA0)
CVSS: MEDIUM 5.1
CISA KEV: Not listed in stored evidence
Original CVE published: 2024-06-11
Original CVE updated: 2025-05-06
Advisory published: 2024-06-11
Advisory updated: 2025-05-06

Who should care

Industrial network administrators, OT security teams, and organizations using Siemens SINEC Traffic Analyzer for network monitoring in critical infrastructure environments.

Technical summary

The SINEC Traffic Analyzer web server fails to enforce HTTP Strict Transport Security (HSTS), allowing attackers to strip TLS encryption through downgrade attacks. This network-layer weakness in HTTPS implementation exposes session traffic to interception. The vulnerability is locally exploitable with CVSS 3.1 score 5.1 (Medium). Remediation requires updating to firmware version 1.2 or later which implements proper HSTS header enforcement.

Defensive priority

medium

Recommended defensive actions

Apply vendor fix: Update SINEC Traffic Analyzer to version 1.2 or later per Siemens security advisory SSA-196737.
Verify HSTS enforcement after update by checking HTTP response headers for Strict-Transport-Security directives.
Implement network segmentation to limit exposure of ICS web management interfaces to untrusted networks.
Monitor for suspicious network activity indicating potential man-in-the-middle or downgrade attempts against HTTPS connections.
Review CISA ICS recommended practices for defense-in-depth strategies applicable to industrial control systems.

Evidence notes

CISA CSAF advisory ICSA-24-165-13 documents this vulnerability with CVSS 3.1 vector AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N. The advisory was revised twice: 2025-02-11 (CVSS vector update) and 2025-05-06 (typo corrections). Siemens SSA-196737 provides the authoritative vendor security advisory.

Sources and references

Verified primary and authoritative sources

CVE-2024-35210 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2024-35210

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2024-35210 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2024-35210

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Source item URL
Unverified legacy reference

URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2024/icsa-24-165-13.json

cisa_csaf
Source reference
Unverified legacy reference

URL: https://cert-portal.siemens.com/productcert/csaf/ssa-196737.json

Reference
Source reference
Unverified legacy reference

URL: https://cert-portal.siemens.com/productcert/html/ssa-196737.html

Reference
Source reference
Unverified legacy reference

URL: https://www.cisa.gov/news-events/ics-advisories/icsa-24-165-13

Reference
Source reference
Unverified legacy reference

URL: https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01

Reference
Source reference
Unverified legacy reference

URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

Reference
Source reference
Unverified legacy reference

URL: https://www.cisa.gov/topics/industrial-control-systems

Reference
Source reference
Unverified legacy reference

URL: https://us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.