Bug 1324823 – CVE-2016-3622 libtiff: Division by zero in fpAcc function

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Bug 1324823 - (CVE-2016-3622) CVE-2016-3622 libtiff: Division by zero in fpAcc function

Summary:	CVE-2016-3622 libtiff: Division by zero in fpAcc function

Status:	CLOSED WONTFIX

Aliases:	CVE-2016-3622

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
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URL:
Whiteboard:	impact=low,public=20160407,reported=2...
Keywords:	Security

Depends On:	1324816 1324817
Blocks:	1316881
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Reported:	2016-04-07 07:30 EDT by Adam Mariš
Modified:	2017-05-11 04:28 EDT (History)
CC List:	5 users (show)

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Doc Type:	Bug Fix
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Last Closed:	2017-05-11 04:28:15 EDT
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Description Adam Mariš 2016-04-07 07:30:18 EDT

Division by zero vulnerability was found in fpAcc function in tif_predict.c in tiff2rgba, allowing attacker to cause a denial of service via a crafted TIFF image.

Vulnerable code:

libtiff-master/libtiff/tif_predict.c:381.

377 fpAcc(TIFF* tif, uint8* cp0, tmsize_t cc)
378 {
379         tmsize_t stride = PredictorState(tif)->stride;
380         uint32 bps = tif->tif_dir.td_bitspersample / 8;
381         tmsize_t wc = cc / bps;
382         tmsize_t count = cc;
383         uint8 *cp = (uint8 *) cp0;
384         uint8 *tmp = (uint8 *)_TIFFmalloc(cc);

Public via:

http://seclists.org/oss-sec/2016/q2/23

Comment 1 Adam Mariš 2016-04-07 07:30:28 EDT

Acknowledgments:

Name: Mei Wang (Qihoo 360)

Comment 3 Stefan Cornelius 2017-05-11 04:28:24 EDT

Statement:

Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.

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