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Message-Id: <20160625094538.ADFB7332009@smtpvbsrv1.mitre.org>
Date: Sat, 25 Jun 2016 05:45:38 -0400 (EDT)
From: cve-assign@...re.org
To: i.elsayed92@...il.com
Cc: cve-assign@...re.org, oss-security@...ts.openwall.com
Subject: Re: Fwd: out-of-bounds read in MagickCore/property.c:1396 could lead to memory leak/ Integer overflow read to RCE - ImageMagick
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> two bugs to ImageMagick
>
> https://github.com/ImageMagick/ImageMagick/commit/d8ab7f046587f2e9f734b687ba7e6e10147c294b
> an integer overflow that might lead to remote code execution.
>
> https://github.com/ImageMagick/ImageMagick/blob/master/MagickCore/profile.c#L2025
>
> An integer overflow occurs in this comparison because number_bytes is a
> very large number like (0xFFFFFFFFFFFFFF87) and when we add offset to
> it which we control we can overflow and the result is < length so we
> pass this if condition.
Use CVE-2016-5841.
> MagickCore/property.c:1401 format=(size_t) ReadPropertyUnsignedShort(endian,q+2);
> MagickCore/property.c:1404 components=(ssize_t) ReadPropertySignedLong(endian,q+4);
> MagickCore/property.c:1382 number_entries=(size_t) ReadPropertyUnsignedShort(endian,directory);
> MagickCore/property.c:1396 q=(unsigned char *) (directory+(12*entry)+2);
>
> we can partially control q which can be used later to read arbitrary
> data from the process of ImageMagick.
Use CVE-2016-5842.
- --
CVE Assignment Team
M/S M300, 202 Burlington Road, Bedford, MA 01730 USA
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