BACnet Stack up to 1.3.1 APDU bacapp.c bacapp_decode_application_data buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in BACnet Stack up to 1.3.1. It has been classified as critical. This affects the function bacapp_decode_application_data of the file bacapp.c of the component APDU Handler. Performing a manipulation results in buffer overflow. This vulnerability is cataloged as CVE-2023-51773. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in BACnet Stack up to 1.3.1. It has been classified as critical. This affects the function bacapp_decode_application_data of the file bacapp.c of the component APDU Handler. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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

The weakness was shared 12/25/2023. The advisory is shared at sourceforge.net. This vulnerability is uniquely identified as CVE-2023-51773. Technical details are known, but no exploit is available.

Upgrading to version 1.3.2 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Stack 1.3.2
Patch: github.com

Timelineinfo

12/25/2023 🔍
12/25/2023 +0 days 🔍
12/25/2023 +0 days 🔍
05/24/2025 +515 days 🔍

Sourcesinfo

Advisory: sourceforge.net
Status: Confirmed

CVE: CVE-2023-51773 (🔍)
GCVE (CVE): GCVE-0-2023-51773
GCVE (VulDB): GCVE-100-249009

Entryinfo

Created: 12/25/2023 22:25
Updated: 05/24/2025 00:44
Changes: 12/25/2023 22:25 (41), 01/19/2024 09:21 (2), 05/24/2025 00:44 (16)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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