Bug 2080985

Summary:	CVE-2021-21897 libdxflib: heap-based buffer overflow in the DL_Dxf:handleLWPolylineData function [epel-7]
Product:	[Fedora] Fedora EPEL	Reporter:	Marian Rehak <mrehak>
Component:	libdxflib	Assignee:	Ben Beasley <code>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	epel7	CC:	code, samuel.rakitnican
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-05-02 14:56:27 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2080983

Description Marian Rehak 2022-05-02 14:12:05 UTC

This is an automatically created tracking bug!  It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of epel-7.

For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.

For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs

When submitting as an update, use the fedpkg template provided in the next
comment(s).  This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.

Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.

Comment 1 Marian Rehak 2022-05-02 14:12:07 UTC

Use the following template to for the 'fedpkg update' request to submit an
update for this issue as it contains the top-level parent bug(s) as well as
this tracking bug.  This will ensure that all associated bugs get updated
when new packages are pushed to stable.

=====

# bugfix, security, enhancement, newpackage (required)
type=security

# low, medium, high, urgent (required)
severity=high

# testing, stable
request=testing

# Bug numbers: 1234,9876
bugs=2080983,2080985

# Description of your update
notes=Security fix for [PUT CVEs HERE]

# Enable request automation based on the stable/unstable karma thresholds
autokarma=True
stable_karma=3
unstable_karma=-3

# Automatically close bugs when this marked as stable
close_bugs=True

# Suggest that users restart after update
suggest_reboot=False

======

Additionally, you may opt to use the bodhi web interface to submit updates:

https://bodhi.fedoraproject.org/updates/new

Comment 2 Ben Beasley 2022-05-02 14:56:27 UTC

This one is a little annoying because the linked disclosure reports the issue is fixed:

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1346

> 2021-08-04 - Vendor Disclosure
> 2021-08-21 - Follow up with vendor
> 2021-08-27 - Vendor patched
> 
> 2021-09-07 - Public Release

but does not give a dxflib version number containing the fix nor a link to the relevant patch. Looking at the commit history of src/3rdparty/dxflib/src/dl_dxf.cpp, comparing commit messages against the disclosure description, and cross-checking dates, it appears that https://github.com/qcad/qcad/commit/1eeffc5daf5a06cf6213ffc19e95923cdebb2eb8 is the fix. This commit is included in dxflib v3.26.4.6 and later.

Inspection of the source contents shows that the fix from that commit is already in the 3.26.4 release as packaged in the libdxflib package in all Fedora and EPEL releases except F36—where it is available in testing, but is held up by the Final Freeze.