A heap-based buffer overflow exists in lib60870-C 2.4.0 in the server-side FileSegment ASDU encoding path. The issue occurs because FileSegment_encode() validates only the standalone segment length via FileSegment_GetMaxDataSize() and does not verify the residual capacity of the current ASDU frame before encoding object fields and segment data
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Fixes

Solution

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Workaround

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History

Fri, 07 Aug 2026 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Mz-automation
Mz-automation lib60870
Vendors & Products Mz-automation
Mz-automation lib60870

Thu, 06 Aug 2026 16:15:00 +0000

Type Values Removed Values Added
Title Heap-based Buffer Overflow in lib60870-C 2.4.0 ASDU Encoding Path

Thu, 06 Aug 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 06 Aug 2026 00:45:00 +0000

Type Values Removed Values Added
Title Heap-based Buffer Overflow in lib60870-C 2.4.0 ASDU Encoding Path
Weaknesses CWE-122

Wed, 05 Aug 2026 23:30:00 +0000

Type Values Removed Values Added
Description A heap-based buffer overflow exists in lib60870-C 2.4.0 in the server-side FileSegment ASDU encoding path. The issue occurs because FileSegment_encode() validates only the standalone segment length via FileSegment_GetMaxDataSize() and does not verify the residual capacity of the current ASDU frame before encoding object fields and segment data
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-08-06T12:23:51.488Z

Reserved: 2026-07-30T00:00:00.000Z

Link: CVE-2026-67873

cve-icon Vulnrichment

Updated: 2026-08-06T12:23:13.411Z

cve-icon NVD

Status : Received

Published: 2026-08-06T00:16:54.380

Modified: 2026-08-06T13:18:23.587

Link: CVE-2026-67873

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-07T09:30:11Z

Weaknesses