Bug 1302622 (CVE-2016-2090)

Summary:	CVE-2016-2090 libbsd: heap buffer overflow in fgetwln function
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	spacewar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libbsd 0.8.2	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 02:47:59 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:	1302623, 1302624, 1302625, 1302626
Bug Blocks:

Description Andrej Nemec 2016-01-28 09:58:04 UTC

libbsd 0.8.1 and earlier contains a buffer overflow in the function
fgetwln(). An if checks if it is necessary to reallocate memory in the
target buffer. However this check is off by one, therefore an out of
bounds write happens.

Original bug report

https://bugs.freedesktop.org/show_bug.cgi?id=93881

Upstream fix:

http://cgit.freedesktop.org/libbsd/commit/?id=c8f0723d2b4520bdd6b9eb7c3e7976de726d7ff7

External reference:

https://blog.fuzzing-project.org/36-Heap-buffer-overflow-in-fgetwln-function-of-libbsd.html

CVE assignment:

http://seclists.org/oss-sec/2016/q1/234

Comment 1 Andrej Nemec 2016-01-28 09:58:50 UTC

Created libbsd tracking bugs for this issue:

Affects: fedora-all [bug 1302623]
Affects: epel-5 [bug 1302624]
Affects: epel-6 [bug 1302625]
Affects: epel-7 [bug 1302626]

Comment 2 Product Security DevOps Team 2019-06-08 02:47:59 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.