29 June 2010
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AUSCERT External Security Bulletin Redistribution
Multiple Vendor LibTIFF 3.9.2 Stack Buffer Overflow Vulnerability
29 June 2010
AusCERT Security Bulletin Summary
Operating System: UNIX variants (UNIX, Linux, OSX)
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
CVE Names: CVE-2010-2067
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iDefense Security Advisory 06.21.10
Jun 21, 2010
libTIFF is a free and popular image library that provides support for
displaying and manipulating Tag Image File Format (TIFF) image data.
This library is used by numerous applications and is included in
various vendor operating system distributions. For more information,
see the vendor's site found at the following link:
Remote exploitation of a stack buffer overflow vulnerability in version
3.9.2 of LibTIFF, as included in various vendors' operating system
distributions, could allow an attacker to execute arbitrary code with
the privileges of the current user.
This vulnerability is due to insufficient bounds checking when copying
data into a stack allocated buffer. During the processing of a certain EXIF
tag a fixed sized stack buffer is used as a destination location for a memory
copy. This memory copy can cause the bounds of a stack buffer to be overflown
and this condition may lead to arbitrary code execution.
Exploitation of this vulnerability results in the execution of arbitrary
code with the privileges of the current user. In order to exploit this
vulnerability, a user must load a web page containing a specially
crafted TIFF image. An attacker typically accomplishes this via social
engineering or injecting content into compromised, trusted sites.
Typical social engineering attacks will pass URLs as part of instant
messages or electronic mail.
iDefense has confirmed the existence of this vulnerability in version
3.9.2 of libTIFF. Previous versions are not affected.
iDefense is currently unaware of any workaround for this issue.
VI. VENDOR RESPONSE
Multiple vendors have released patches to address this issue.
Information about downloadable vendor updates can be found by clicking
on the URL shown.
VII. CVE INFORMATION
The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2010-2067 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
VIII. DISCLOSURE TIMELINE
05/27/2010 Initial Vendor Notification
05/27/2010 Initial Vendor Reply
06/21/2010 Coordinated Public Disclosure
This vulnerability was reported to iDefense by Dan Rosenberg.
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There are no warranties with regard to this information. Neither the
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reliance on, this information.
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