Bug 1356867 – CVE-2016-6223 libtiff: Out-of-bounds read on memory-mapped files in TIFFReadRawStrip1() and TIFFReadRawTile1()

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Bug 1356867 - (CVE-2016-6223) CVE-2016-6223 libtiff: Out-of-bounds read on memory-mapped files in TIFFReadRawStrip1() and TIFFReadRawTile1()

Summary:	CVE-2016-6223 libtiff: Out-of-bounds read on memory-mapped files in TIFFReadR...

Status:	CLOSED WONTFIX

Aliases:	CVE-2016-6223

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

Priority	medium Severity medium
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Target Release:	---
Assigned To:	Red Hat Product Security
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Whiteboard:	impact=moderate,public=20160710,repor...
Keywords:	Security

Depends On:	1356871 1356869 1356870
Blocks:	1346703 1356874
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Reported:	2016-07-15 03:39 EDT by Adam Mariš
Modified:	2017-06-27 07:51 EDT (History)
CC List:	5 users (show)

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Last Closed:	2017-06-27 07:51:12 EDT
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Description Adam Mariš 2016-07-15 03:39:00 EDT

An out-of-bounds read vulnerability on memory-mapped files in TIFFReadRawStrip1() and TIFFReadRawTile1() when stripoffset is beyond tmsize_t max value was found. The vulnerability allows an attacker to specify a negative index into the file-content buffer and copy data from that position until the end of the buffer. This will allow an attacker to crash the process by accessing unmapped memory and (depending on how LibTIFF is used) might also allow an attacker to leak sensitive information.

Fixed by commit with commitid: YhOZoKv5OA9gNNdz;

CVE assignment:

http://seclists.org/oss-sec/2016/q3/67

Comment 1 Adam Mariš 2016-07-15 03:42:38 EDT

Created libtiff tracking bugs for this issue:

Affects: fedora-all [bug 1356869]

Comment 2 Adam Mariš 2016-07-15 03:42:44 EDT

Created mingw-libtiff tracking bugs for this issue:

Affects: fedora-all [bug 1356870]
Affects: epel-all [bug 1356871]

Comment 3 Stefan Cornelius 2016-07-25 05:37:35 EDT

Upstream patch:
https://github.com/vadz/libtiff/commit/0ba5d8814a17a64bdb8d9035f4c533f3f3f4b496

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