Bug 1656183 (CVE-2018-19492)

Summary:	CVE-2018-19492 gnuplot: buffer overflow in cairotrm_options function
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	amello, fkluknav, orion, pcahyna, steve.traylen
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2018-12-06 11:21:41 UTC	Type:	---
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Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1656184, 1656185
Bug Blocks:	1656186

Description Laura Pardo 2018-12-04 21:58:24 UTC

An issue was discovered in cairo.trm in Gnuplot 5.2.5. This issue allows an attacker to conduct a buffer overflow with an arbitrary amount of data in the cairotrm_options function. This flaw is caused by a missing size check of an argument passed to the "set font" function. This issue occurs when the Gnuplot pngcairo terminal is used as a backend. 


References:
https://sourceforge.net/p/gnuplot/bugs/2089/ 
https://sourceforge.net/p/gnuplot/gnuplot-main/ci/d5020716834582b20a5e12cdd49f39ee4f9dd949/

Comment 1 Laura Pardo 2018-12-04 21:58:59 UTC

Created gnuplot tracking bugs for this issue:

Affects: fedora-all [bug 1656185]


Created gnuplot44 tracking bugs for this issue:

Affects: epel-6 [bug 1656184]

Comment 2 Stefan Cornelius 2018-12-06 11:21:51 UTC

Statement:

Gnuplot allows for trivial execution of arbitrary commands from within gnuplot files by design. As such, gnuplot files should be considered as inherently dangerous and users should only execute files from trusted sources.