Bug 1359756 (CVE-2016-6292) - CVE-2016-6292 php: Null pointer dereference in exif_process_user_comment
Summary: CVE-2016-6292 php: Null pointer dereference in exif_process_user_comment
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2016-6292
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1359837
Blocks: 1359830
TreeView+ depends on / blocked
 
Reported: 2016-07-25 12:08 UTC by Adam Mariš
Modified: 2020-01-17 15:51 UTC (History)
14 users (show)

Fixed In Version: php 5.5.38, php 5.6.24, php 7.0.9
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-09-26 19:36:37 UTC
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:2750 0 normal SHIPPED_LIVE Moderate: rh-php56 security, bug fix, and enhancement update 2016-11-15 16:40:02 UTC

Description Adam Mariš 2016-07-25 12:08:55 UTC 
Null pointer dereference vulnerability was found in exif_process_user_comment when trying to encode JIS string.

Upstream bug:

https://bugs.php.net/bug.php?id=72618

Upstream patch:

http://git.php.net/?p=php-src.git;a=commit;h=41131cd41d2fd2e0c2f332a27988df75659c42e4

CVE assignment:

http://seclists.org/oss-sec/2016/q3/137
Comment 1 Adam Mariš 2016-07-25 14:12:24 UTC 
Created php tracking bugs for this issue:

Affects: fedora-all [bug 1359837]
Comment 2 Huzaifa S. Sidhpurwala 2016-08-05 06:16:50 UTC 
Analysis:

mbfl_buffer_converter_new2() is passed null strings, due to a specially-crafted JPG image. Later when the string is processed, it results in null pointer deref and a crash. 

Similar to CVE-2016-6291, exploitation requires a specially-crafted JPEG image, being processed by the PHP script.
Comment 4 errata-xmlrpc 2016-11-15 11:43:38 UTC 
This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 6
  Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS

Via RHSA-2016:2750 https://rhn.redhat.com/errata/RHSA-2016-2750.html
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