Bug 1992790 (CVE-2020-21683)

Summary:	CVE-2020-21683 transfig: A global buffer overflow in the shade_or_tint_name_after_declare_color in genpstricks.c could result in a denial of service
Product:	[Other] Security Response	Reporter:	Michael Kaplan <mkaplan>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	databases-maint, hhorak, kasal, mschorm, pkubat
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:	1998593, 1998594
Bug Blocks:	1992794

Description Michael Kaplan 2021-08-11 18:15:37 UTC

A global buffer overflow in the shade_or_tint_name_after_declare_color in genpstricks.c of fig2dev 3.2.7b allows attackers to cause a denial of service (DOS) via converting a xfig file into pstricks format.

Reference:

https://sourceforge.net/p/mcj/tickets/77/

Comment 1 Garrett Tucker 2021-08-27 17:07:16 UTC

A DoS could be triggered via a buffer overflow due to the implementation of shading or tinting when converting to pstricks. The problem is a result of handling an unknown color when tinting or shading which lead to an incorrect offset and an eventual DoS. The patch for remediation is: https://sourceforge.net/p/mcj/fig2dev/ci/639c36010a120e97a6e82e7cd57cbf9dbf4b64f1/