CVE-2023-21273: Bluetooth SDP OOB write in SDP_AddAttributeToRecord

platform/packages/modules/Bluetooth Updated 02 Oct 2025

Summary

01/08/2023

Disclosed on

CVE-2023-21273

CVE

Yes i

Fix available

Critical

Severity

Not published

CVSS Score

CVE-2023-21273: In SDP_AddAttribute of sdp_db.cc, there is a possible out of bounds write due to an incorrect bounds check. Affects platform/packages/modules/Bluetooth across 2 version ranges.

>= 13:0, < 13:2023-08-01 >= 13-next:0, < 13-next:2023-08-01

Fixed in 13-next:2023-08-01. How to fix ↓

Free scan

Check if this vulnerability affects your application

Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.

Check my app free

No signup required · Results in about 60 seconds

Upload your dependency manifest or SBOM

Drag & drop your file here or Browse

Java Javascript PHP Python Go Rust Ruby Dart C/C++ Elixir CycloneDX SPDX

Upload a supported dependency manifest or SBOM. No installation or source-code access required.

See supported files and SBOM formats

SBOM sbom.json · bom.json · bom.xml · *.spdx.json · *.cdx.json · *.cdx.xml

Java pom.xml · gradle.lockfile · buildscript-gradle.lockfile

Javascript package-lock.json · yarn.lock · pnpm-lock.yaml

PHP composer.lock

Python poetry.lock · requirements.txt · Pipfile.lock

Go go.mod

Rust Cargo.lock

Ruby Gemfile.lock

Dart pubspec.lock

C/C++ conan.lock

Elixir mix.lock

Enter your work email to receive your report link.

Verify your email to view the full report and start 30 days of continuous monitoring. No credit card required.

Background

The Bluetooth package in the Android ecosystem is responsible for handling Bluetooth functionality on Android devices. It provides APIs and services for Bluetooth communication, including the Service Discovery Protocol (SDP) which allows devices to discover and connect to each other. SDP_AddAttributeToRecord is a function within the Bluetooth package that adds an attribute to an SDP record. This vulnerability affects versions 11, 12, 12L, and 13 of the Bluetooth package.

Vulnerability Detail

The vulnerability exists in the SDP_AddAttributeToRecord function of the Bluetooth package. Due to an incorrect bounds check, an out of bounds write can occur, leading to a potential remote code execution. An attacker in close proximity to the affected device can exploit this vulnerability without requiring any additional execution privileges or user interaction. The impact of this vulnerability is critical as it can allow an attacker to execute arbitrary code on the device.

How To Fix

Minimum fixed version

13-next:2023-08-01

This is the first release that contains the fix.

Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →

Workaround

There is no known workaround for this vulnerability. It is recommended to apply the fix provided by updating the Bluetooth package to the fixed version.

Conclusion

The Bluetooth package in the Android ecosystem is vulnerable to an out of bounds write in the SDP_AddAttributeToRecord function. This vulnerability can be exploited remotely by an attacker in close proximity to the affected device, leading to potential remote code execution. To mitigate the risk, it is recommended to update the Bluetooth package to the fixed version. For further support on vulnerability remediation, please contact DevNack.com.

See every vulnerability recorded for platform/packages/modules/Bluetooth →