Bug 1907521 (CVE-2020-27844)

Summary:	CVE-2020-27844 openjpeg: heap-based buffer overflow in opj_t2_encode_packet function in openjp2/t2.c
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	hobbes1069, jaromir.capik, manisandro, nforro, oliver, rdieter
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	openjpeg 2.4.0	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in openjpeg's src/lib/openjp2/t2.c. This flaw allows an attacker to provide crafted input to openjpeg during conversion and encoding, causing an out-of-bounds write. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-12-16 04:18:17 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:	1907695, 1907696, 1907697, 1907698
Bug Blocks:	1906158, 1907565

Description Guilherme de Almeida Suckevicz 2020-12-14 16:47:43 UTC

A flaw was found in OpenJPEG. Specially crafted input file can lead to a heap-based buffer overflow in opj_t2_encode_packet function in openjp2/t2.c.

Reference:
https://github.com/uclouvain/openjpeg/issues/1299

Comment 1 Todd Cullum 2020-12-15 02:00:09 UTC

Acknowledgments:

Name: zodf0055980 (SQLab NCTU Taiwan)

Comment 2 Todd Cullum 2020-12-15 02:19:23 UTC

Created mingw-openjpeg2 tracking bugs for this issue:

Affects: fedora-all [bug 1907698]


Created openjpeg tracking bugs for this issue:

Affects: fedora-all [bug 1907697]


Created openjpeg2 tracking bugs for this issue:

Affects: epel-7 [bug 1907695]
Affects: fedora-all [bug 1907696]

Comment 4 Todd Cullum 2020-12-15 02:26:40 UTC

Upstream commit: https://github.com/uclouvain/openjpeg/commit/73fdf28342e4594019af26eb6a347a34eceb6296

Comment 6 Todd Cullum 2020-12-16 01:05:24 UTC

Mitigation:

This flaw can be mitigated by not converting or encoding untrusted input data using openjpeg. For example, just reading a file with openjpeg does not trigger the flaw. Additionally, the fortify protection limits the degree of exploitation that the flaw could be used to achieve.

Comment 7 Product Security DevOps Team 2020-12-16 04:18:17 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-2020-27844

Comment 8 Sandro Mani 2020-12-17 15:24:15 UTC

This only affects unreleased versions of openjpeg2, specifically newer than https://github.com/uclouvain/openjpeg/commit/4edb8c83374f52cd6a8f2c7c875e8ffacccb5fa5