Bug 2025628 (CVE-2021-21899)

Summary:	CVE-2021-21899 librecad: heap out-of-bounds write in dwgCompressor:copyCompBytes21
Product:	[Other] Security Response	Reporter:	Michael Kaplan <mkaplan>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	hobbes1069, redhat, spotrh
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-11-22 16:19:27 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2025629, 2025630
Bug Blocks:

Description Michael Kaplan 2021-11-22 16:04:32 UTC

A code execution vulnerability exists in the dwgCompressor::copyCompBytes21 functionality of LibreCad libdxfrw 2.2.0-rc2-19-ge02f3580. A specially-crafted .dwg file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.

References:

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1350

Comment 1 Michael Kaplan 2021-11-22 16:04:51 UTC

Created librecad tracking bugs for this issue:

Affects: epel-7 [bug 2025630]
Affects: fedora-all [bug 2025629]

Comment 2 Product Security DevOps Team 2021-11-22 16:19:26 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.