Bug 1082839 (CVE-2018-7453)

Summary:	VUL-1: CVE-2018-7453: xpdf: Infinite recursion in AcroForm::scanField in AcroForm.cc allows attackers to launch denial of service via a specific pdf file due to lack of loop checking
Product:	[Novell Products] SUSE Security Incidents	Reporter:	Karol Babioch <karol>
Component:	Incidents	Assignee:	Peter Simons <peter.simons>
Status:	RESOLVED INVALID	QA Contact:	Security Team bot <security-team>
Severity:	Normal
Priority:	P4 - Low	CC:	pgajdos, smash_bz, stoyan.manolov
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/200813/
Whiteboard:	CVSSv3:SUSE:CVE-2018-7453:3.3:(AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L) maint:planned:update
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---
Bug Depends on:
Bug Blocks:	1133493

Description Karol Babioch 2018-02-26 13:03:38 UTC

CVE-2018-7453

Infinite recursion in AcroForm::scanField in AcroForm.cc in xpdf 4.00 allows
attackers to launch denial of service via a specific pdf file due to lack of
loop checking, as demonstrated by pdftohtml.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7453
http://www.cvedetails.com/cve/CVE-2018-7453/
https://forum.xpdfreader.com/viewtopic.php?p=814#p814

Comment 1 Peter Simons 2018-06-21 09:26:15 UTC

Upstream has no intention to provide a fix for this issue:

> This one is a known bug. There are several places where a 
> PDF file can contain an infinte loop. Xpdf currently checks
> for some of them, but not all. I'm working on a generic loop
> detector for the Xpdf 5 release.

That statement was published over 1 year ago. No observable progress has been made since.

Comment 2 Petr Gajdos 2023-06-08 10:44:02 UTC

testcase
https://github.com/skysider/FuzzVuln/blob/master/xpdf_pdftohtml_infinite_recursion_AcroForm_scanField.pdf

No crash in devel,15,12,11sp1/poppler. xpdf is not maintained anymore. I suggest to close this.