Bug 1356867 (CVE-2016-6223)

Summary: CVE-2016-6223 libtiff: Out-of-bounds read on memory-mapped files in TIFFReadRawStrip1() and TIFFReadRawTile1()
Product: [Other] Security Response Reporter: Adam Mariš <amaris>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: erik-fedora, nforro, phracek, sardella, slawomir
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Last Closed: 2017-06-27 11:51:12 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1356869, 1356870, 1356871    
Bug Blocks: 1346703, 1356874    

Description Adam Mariš 2016-07-15 07:39:00 UTC 
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 07:42:38 UTC 
Created libtiff tracking bugs for this issue:

Affects: fedora-all [bug 1356869]
Comment 2 Adam Mariš 2016-07-15 07:42:44 UTC 
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 09:37:35 UTC 
Upstream patch:
https://github.com/vadz/libtiff/commit/0ba5d8814a17a64bdb8d9035f4c533f3f3f4b496