Bug 1882344 (CVE-2020-24890)

Summary:	CVE-2020-24890 libraw: null pointer dereference in parse_tiff_ifd in src/metadata/tiff.cpp
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	dchen, debarshir, gwync, hobbes1069, jridky, manisandro, nphilipp, siddharth.kde, siddhesh, than
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:	2020-09-25 20:40:55 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:	1882349, 1882350, 1882351
Bug Blocks:	1882348

Description Dhananjay Arunesh 2020-09-24 10:54:28 UTC

A vulnerability was found in libraw 20.0 has a null pointer dereference vulnerability in parse_tiff_ifd in src/metadata/tiff.cpp, which may result in context-dependent arbitrary code execution.

References:
https://github.com/LibRaw/LibRaw/issues/335

Comment 1 Dhananjay Arunesh 2020-09-24 10:56:57 UTC

Created LibRaw tracking bugs for this issue:

Affects: epel-6 [bug 1882351]
Affects: fedora-all [bug 1882349]


Created mingw-LibRaw tracking bugs for this issue:

Affects: fedora-all [bug 1882350]

Comment 2 Todd Cullum 2020-09-25 00:26:08 UTC

L#13165 of internal/dcraw_common.cpp is where the subject code is in 0.19.5.

Comment 3 Todd Cullum 2020-09-25 18:27:20 UTC

I get no such segfault using LibRaw 0.19.5 as built with g++ 9.3.1 on Fedora. I also do not get it on RHEL7 using g++ 4.8.5 or on RHEL8 using g++ 8.3.1 with the respectively shipped LibRaw rpms. The upstream maintainer identified this as a compiler problem as built by the reporter as the code in LibRaw is correct[1].

1. https://github.com/LibRaw/LibRaw/issues/335#issuecomment-677637276

Comment 4 Todd Cullum 2020-09-25 19:09:15 UTC

Statement:

LibRaw as shipped in Red Hat Enterprise Linux 7 and 8 are not affected by this flaw - the flaw seems to be isolated to the specific compiler version used to build LibRaw by the reporter. Versions of g++ and LibRaw as shipped did not exhibit the flaw.

Comment 5 Product Security DevOps Team 2020-09-25 20:40:55 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-24890