Bug 1340856 (CVE-2016-5116)

Summary:	CVE-2016-5116 gd: Information leak due to stack overflow in gdCtxPrintf
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abhgupta, dmcphers, fedora, hhorak, jialiu, jmlich83, jokerman, lmeyer, mmccomas, tiwillia
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 02:53:06 UTC	Type:	---
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Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1340857
Bug Blocks:

Description Andrej Nemec 2016-05-30 12:34:24 UTC

While creating an XBM image (imagexbm) with an user supplied name,
libgd isn't checking the vsnprintf return value and PHP 5.5 will trust
this length and read more memory than it should, causing a read-out-of
boundaries, leaking stack memory.

References:

http://seclists.org/oss-sec/2016/q2/428

External references:

https://github.com/libgd/libgd/issues/211

Upstream fix:

https://github.com/libgd/libgd/commit/4dc1a2d7931017d3625f2d7cff70a17ce58b53b4

Comment 1 Andrej Nemec 2016-05-30 12:35:48 UTC

Created gd tracking bugs for this issue:

Affects: fedora-all [bug 1340857]

Comment 2 Fedora Update System 2016-06-02 14:55:08 UTC

gd-2.1.1-6.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 3 Fedora Update System 2016-06-17 15:50:29 UTC

gd-2.1.1-4.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.