Bug 1595502 – CVE-2018-12882 php: Use-after-free reachable via the exif.c:exif_read_from_impl() function

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Bug 1595502 - (CVE-2018-12882) CVE-2018-12882 php: Use-after-free reachable via the exif.c:exif_read_from_impl() function

Summary:	CVE-2018-12882 php: Use-after-free reachable via the exif.c:exif_read_from_im...

Status:	NEW

Aliases:	CVE-2018-12882

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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Assigned To:	Red Hat Product Security
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Whiteboard:	impact=moderate,public=20180603,repor...
Keywords:	Security

Depends On:	1595503 1595504
Blocks:	1595510
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Reported:	2018-06-26 23:03 EDT by Sam Fowler
Modified:	2018-07-18 00:39 EDT (History)
CC List:	10 users (show)

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Description Sam Fowler 2018-06-26 23:03:18 EDT

PHP versions 7.2.x through 7.2.7 are vulnerable to a heap-use-after-free in streams.c:_php_stream_free() that is reachable via the exif.c:exif_read_from_impl() function. An attacker could exploit this via a crafted file to potentially execute arbitrary code.

The vulnerable PHP exif_read_data() function was modified in version 7.2.0 to support local files and stream resources.


Upstream Bug:

https://bugs.php.net/bug.php?id=76409


Upstream Patch:

http://git.php.net/?p=php-src.git;a=commit;h=3fdde65617e9f954e2c964768aac8831005497e5


Reference:

http://php.net/manual/en/function.exif-read-data.php

Comment 1 Sam Fowler 2018-06-26 23:03:47 EDT

Created php tracking bugs for this issue:

Affects: fedora-28 [bug 1595503]

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