Heap-buffer-overflow in decode_preR13_entities in libredwg

libredwg Updated 02 Oct 2025

Summary

02/11/2023

Disclosed on

MEDIUM

Severity

Yes i

Fix available

Medium

Severity

Not published

CVSS Score

OSV-2023-1101: Heap-buffer-overflow in decode_preR13_entities. Affects libredwg versions >= 1760559320f27e75d86c9e6edab467bab63d58e9, < 119ef50a0b1ef395defa5ee453acd5d3c158c638. Fixed in 119ef50a0b1ef395defa5ee453acd5d3c158c638. 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

libredwg is an open-source library for reading and writing DWG files, which are the native file format for AutoCAD. It provides functionality to decode and encode various entities in DWG files. However, a vulnerability has been discovered in the library that can lead to a heap-buffer-overflow when decoding pre-R13 entities.

Vulnerability Detail

The vulnerability occurs in the decode_preR13_entities function of libredwg. It can be triggered when processing certain entities in DWG files, causing a heap-buffer-overflow read of 10 bytes. This can potentially lead to a crash or allow an attacker to execute arbitrary code. The vulnerability has a medium severity rating.

How To Fix

Minimum fixed version

119ef50a0b1ef395defa5ee453acd5d3c158c638

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

No workaround has been provided for this vulnerability.

Conclusion

In conclusion, libredwg is vulnerable to a heap-buffer-overflow when decoding pre-R13 entities. It is important to update to the fixed version of libredwg to mitigate the risk of crashes or potential code execution. For further support on vulnerability remediation, please contact DevNack.com.

See every vulnerability recorded for libredwg →