Bug 1391068 (CVE-2016-8670) - CVE-2016-8670 gd, php: Stack based buffer overflow in dynamicGetbuf
Summary: CVE-2016-8670 gd, php: Stack based buffer overflow in dynamicGetbuf
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2016-8670
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1391076 1391077
Blocks: 1404738
TreeView+ depends on / blocked
 
Reported: 2016-11-02 14:01 UTC by Adam Mariš
Modified: 2019-09-29 13:59 UTC (History)
20 users (show)

Fixed In Version: php 5.6.27, php 7.0.11, php 7.1.0
Doc Type: If docs needed, set a value
Doc Text:
A vulnerability was found in gd. Integer underflow in a calculation in dynamicGetbuf() was incorrectly handled, leading in some circumstances to an out of bounds write through a very large argument to memcpy(). An attacker could create a crafted image that would lead to a crash or, potentially, code execution.
Clone Of:
Environment:
Last Closed: 2017-02-21 09:39:45 UTC


Attachments (Terms of Use)

Description Adam Mariš 2016-11-02 14:01:19 UTC
Stack based buffer overflow was found in dynamicGetbuf when passing negative `rlen` as size to memcpy().

PHP bug:

https://bugs.php.net/bug.php?id=73280

GD patch:

https://github.com/libgd/libgd/commit/53110871935244816bbb9d131da0bccff734bfe9

PHP patch:

https://git.php.net/?p=php-src.git;a=commit;h=cc08cbc84d46933c1e9e0149633f1ed5d19e45e9

CVE assignment:

http://www.openwall.com/lists/oss-security/2016/10/15/6

Comment 1 Adam Mariš 2016-11-02 14:11:05 UTC
Created gd tracking bugs for this issue:

Affects: fedora-all [bug 1391077]

Comment 2 Adam Mariš 2016-11-02 14:11:18 UTC
Created php tracking bugs for this issue:

Affects: fedora-all [bug 1391076]


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