Bug 1956348 (CVE-2021-20204)

Summary:	CVE-2021-20204 getdata: Use after free in _GD_Supports() in encoding.c
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	business, emedo_50047k, fpy1nvkl, ft82dw_g, gwync, hinessandra50, jaromir.capik, lucibranden0590, romandavis112, tuxmealux+redhatbz, zenabartell2
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in libgetdata. A heap memory corruption problem (use after free) can be triggered when processing maliciously crafted dirfile databases. This vulnerability may lead to arbitrary code execution or privilege escalation depending on input/skills of attacker.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-05-03 16:46:32 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:	1956350
Bug Blocks:

Description Pedro Sampaio 2021-05-03 14:09:43 UTC

A heap memory corruption problem (use after free) can be triggered in libgetdata v0.10.0 when processing maliciously crafted dirfile databases. This degrades the confidentiality, integrity and availability of third-party software that uses libgetdata as a library. This vulnerability may lead to arbitrary code execution or privilege escalation depending on input/skills of attacker.

References:

https://bugzilla.redhat.com/show_bug.cgi?id=1917635

Comment 1 Pedro Sampaio 2021-05-03 14:10:28 UTC

Created getdata tracking bugs for this issue:

Affects: fedora-all [bug 1956350]

Comment 2 Product Security DevOps Team 2021-05-03 16:46:32 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.

Comment 3 Gianluca Gabrielli 2021-05-07 12:27:34 UTC

Could you please share the patch or make https://bugzilla.redhat.com/show_bug.cgi?id=1917635 publicly accessible? Thanks

Comment 10 Gianluca Gabrielli 2021-06-29 16:09:07 UTC

(In reply to Gianluca Gabrielli from comment #3)
> Could you please share the patch or make
> https://bugzilla.redhat.com/show_bug.cgi?id=1917635 publicly accessible?
> Thanks

Hi Pedro, any input here?

Comment 13 Pedro Sampaio 2021-07-07 19:44:47 UTC

In reply to comment #10:
> (In reply to Gianluca Gabrielli from comment #3)
> > Could you please share the patch or make
> > https://bugzilla.redhat.com/show_bug.cgi?id=1917635 publicly accessible?
> > Thanks
> 
> Hi Pedro, any input here?

I don't think there is a patch available but I opened the bug for view:

https://bugzilla.redhat.com/show_bug.cgi?id=1917635