Bug 1769545 (CVE-2019-17533)

Summary:	CVE-2019-17533 matio: improper null termination in Mat_VarReadNextInfo4 in mat4.c leads to heap-based overflow
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	c.david86, lupinix.fedora
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:	2019-11-07 00:51:10 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:	1769547, 1769548, 1769550
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2019-11-06 20:25:11 UTC

Mat_VarReadNextInfo4 in mat4.c in MATIO 1.5.17 omits a certain '\0' character, leading to a heap-based buffer over-read in strdup_vprintf when uninitialized memory is accessed.

References:
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=16856
https://github.com/tbeu/matio/commit/651a8e28099edb5fbb9e4e1d4d3238848f446c9a

Comment 1 Guilherme de Almeida Suckevicz 2019-11-06 20:25:28 UTC

Created matio tracking bugs for this issue:

Affects: epel-6 [bug 1769547]
Affects: epel-7 [bug 1769548]

Comment 2 Guilherme de Almeida Suckevicz 2019-11-06 20:26:52 UTC

Created matio tracking bugs for this issue:

Affects: fedora-all [bug 1769550]

Comment 3 Product Security DevOps Team 2019-11-07 00:51:10 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.