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AUSCERT External Security Bulletin Redistribution
ESB-2012.1000
libexif security update
18 October 2012
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: libexif
Publisher: Debian
Operating System: Debian GNU/Linux 6
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2012-2841 CVE-2012-2840 CVE-2012-2837
CVE-2012-2836 CVE-2012-2814 CVE-2012-2813
CVE-2012-2812
Reference: ASB-2012.0102
Original Bulletin:
http://www.debian.org/security/2012/dsa-2559
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Debian Security Advisory DSA-2559-1 security@debian.org
http://www.debian.org/security/ Yves-Alexis Perez
October 11, 2012 http://www.debian.org/security/faq
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Package : libexif
Vulnerability : several
Problem type : remote
Debian-specific: no
CVE ID : CVE-2012-2812 CVE-2012-2813 CVE-2012-2814 CVE-2012-2836
CVE-2012-2837 CVE-2012-2840 CVE-2012-2841
Debian Bug : 681454
Several vulnerabilities were found in libexif, a library used to parse EXIF
meta-data on camera files.
CVE-2012-2812: A heap-based out-of-bounds array read in the
exif_entry_get_value function allows remote attackers to cause a denial of
service or possibly obtain potentially sensitive information from process
memory via an image with crafted EXIF tags.
CVE-2012-2813: A heap-based out-of-bounds array read in the
exif_convert_utf16_to_utf8 function allows remote attackers to cause a denial
of service or possibly obtain potentially sensitive information from process
memory via an image with crafted EXIF tags.
CVE-2012-2814: A buffer overflow in the exif_entry_format_value function
allows remote attackers to cause a denial of service or possibly execute
arbitrary code via an image with crafted EXIF tags.
CVE-2012-2836: A heap-based out-of-bounds array read in the
exif_data_load_data function allows remote attackers to cause a denial of
service or possibly obtain potentially sensitive information from process
memory via an image with crafted EXIF tags.
CVE-2012-2837: A divide-by-zero error in the mnote_olympus_entry_get_value
function while formatting EXIF maker note tags allows remote attackers to
cause a denial of service via an image with crafted EXIF tags.
CVE-2012-2840: An off-by-one error in the exif_convert_utf16_to_utf8 function
allows remote attackers to cause a denial of service or possibly execute
arbitrary code via an image with crafted EXIF tags.
CVE-2012-2841: An integer underflow in the exif_entry_get_value function can
cause a heap overflow and potentially arbitrary code execution while
formatting an EXIF tag, if the function is called with a buffer size
parameter equal to zero or one.
For the stable distribution (squeeze), these problems have been fixed in
version 0.6.19-1+squeeze1.
For the testing distribution (wheezy), these problems have been fixed in
version 0.6.20-3.
For the unstable distribution (sid), these problems have been fixed in
version 0.6.20-3.
We recommend that you upgrade your libexif packages.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
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