(Apple Issues Fix for iPhone) LibTIFF Buffer Underflow in Decoding LZW Data Lets Remote Users Execute Arbitrary Code
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SecurityTracker Alert ID: 1021266 |
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SecurityTracker URL: http://securitytracker.com/id/1021266
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CVE Reference:
CVE-2008-2327
(Links to External Site)
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Date: Nov 21 2008
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Impact:
Execution of arbitrary code via network, User access via network
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): 1.0 - 2.1
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Description:
A vulnerability was reported in LibTIFF. A remote user can cause arbitrary code to be executed on the target user's system. Apple iPhone is affected.
A remote user can create a specially crafted TIFF file that, when loaded by the target application using libTIFF, will trigger a buffer underflow and execute arbitrary code on the target system. The code will run with the privileges of the target application.
The vulnerability resides in 'tif_lzw.c'.
Drew Yao reported this vulnerability.
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Impact:
A remote user can create a file that, when processed by the target application, will execute arbitrary code on the target system.
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Solution:
Apple has issued a fixed version (2.2) of iPhone, which is affected by this vulnerability.
The Apple advisory is available at:
http://support.apple.com/kb/HT3318
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Vendor URL: support.apple.com/kb/HT3318 (Links to External Site)
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Cause:
Boundary error
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Underlying OS:
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Fri, 21 Nov 2008 02:47:14 -0500
Subject: Apple iPhone
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APPLE-SA-2008-11-20 iPhone OS 2.2 and iPhone OS for iPod touch 2.2
ImageIO
CVE-ID: CVE-2008-2327
Available for: iPhone OS 1.0 through 2.1,
iPhone OS for iPod touch 1.1 through 2.1
Impact: Viewing a maliciously crafted TIFF image may lead to an
unexpected application termination or arbitrary code execution
Description: Multiple uninitialized memory access issues exist in
libTIFF's handling of LZW-encoded TIFF images. Viewing a maliciously
crafted TIFF image may lead to an unexpected application termination
or arbitrary code execution. This update addresses the issue through
proper memory initialization and additional validation of TIFF
images.
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