CVE-2023-51773

CRITICAL

Published Feb 29, 2024 Modified May 23, 2025 CWE-126

Description

BACnet Stack before 1.3.2 has a decode function APDU buffer over-read in bacapp_decode_application_data in bacapp.c.

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CVSS v3.1 Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Weakness Type (CWE)

CWE-126 CWE-126

Affected Products

Vendor	Product	Versions
bacnetstack	bacnet_stack	< 1.3.2

References

Advisories & Patches

https://github.com/bacnet-stack/bacnet-stack/compare/bacnet-stack-1.3.1...bacnet-stack-1.3.2 https://github.com/bacnet-stack/bacnet-stack/pull/546 https://github.com/bacnet-stack/bacnet-stack/pull/546/commits/c465412a076ca6c9ddf649612f2b4e1874d8dcb8 https://github.com/bacnet-stack/bacnet-stack/compare/bacnet-stack-1.3.1...bacnet-stack-1.3.2 https://github.com/bacnet-stack/bacnet-stack/pull/546 https://github.com/bacnet-stack/bacnet-stack/pull/546/commits/c465412a076ca6c9ddf649612f2b4e1874d8dcb8

Other References

https://github.com/bacnet-stack/bacnet-stack/blob/master/CHANGELOG.md https://sourceforge.net/p/bacnet/bugs/85/ https://github.com/bacnet-stack/bacnet-stack/blob/master/CHANGELOG.md https://sourceforge.net/p/bacnet/bugs/85/

Frequently Asked Questions

What is CVE-2023-51773? +

BACnet Stack before 1.3.2 has a decode function APDU buffer over-read in bacapp_decode_application_data in bacapp.c. It has a CVSS v3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2023-51773? +

CVE-2023-51773 has a CVSS v3.1 score of 9.1 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2023-51773? +

CVE-2023-51773 affects products from bacnetstack, specifically: bacnet_stack. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-51773? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.