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AUSCERT External Security Bulletin Redistribution
ESB-2006.0003 -- [UNIX/Linux][SCO]
A vulnerability in LibTIFF allows execution of arbitrary code
4 January 2006
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AusCERT Security Bulletin Summary
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Product: LibTIFF
Publisher: SCO
Operating System: UNIX variants (UNIX, Linux, OSX)
Impact: Execute Arbitrary Code/Commands
Access: Remote/Unauthenticated
CVE Names: CVE-2005-1544
Original Bulletin:
ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2006.3/SCOSA-2006.3.txt
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______________________________________________________________________________
SCO Security Advisory
Subject: OpenServer 5.0.6 OpenServer 5.0.7 OpenServer 6.0.0 : LibTIFF BitsPerSample Tag Buffer Overflow Vulnerability
Advisory number: SCOSA-2006.3
Issue date: 2006 January 03
Cross reference: sr894565 fz532776 erg712890
sr894563 fz532777 erg712888
CVE-2005-1544
______________________________________________________________________________
1. Problem Description
Tavis Ormandy has reported a vulnerability in libTIFF, which
potentially can be exploited by malicious people to compromise a
vulnerable system.
The vulnerability is caused due to a boundary error and can be
exploited to cause a buffer overflow via a specially crafted
TIFF image containing a malformed BitsPerSample tag.
Successful exploitation may allow execution of arbitrary code,
if a malicious TIFF image is opened in an application linked
against the vulnerable library.
The Common Vulnerabilities and Exposures project (cve.mitre.org)
has assigned the name CVE-2005-1544 to this issue.
2. Vulnerable Supported Versions
System Binaries
----------------------------------------------------------------------
OpenServer 5.0.6 /usr/lib/libtiff.so.3
OpenServer 5.0.7 /usr/lib/libtiff.so.3
OpenServer 6.0.0 /usr/lib/libtiff.so.3
/osr5/usr/lib/libtiff.so.3
3. Solution
The proper solution is to install the latest packages.
4. OpenServer 5.0.6
4.1 Location of Fixed Binaries
ftp://ftp.sco.com/pub/openserver5/opensrc/gwxlibs-2.1.0Ba/
4.2 Verification
MD5 (gwxlibs210Ba_vol.tar) = 18213632bd0c5ff1e260eac90aae7033
md5 is available for download from
ftp://ftp.sco.com/pub/security/tools
4.3 Installing Fixed Binaries
Please see the following:
ftp://ftp.sco.com/pub/openserver5/opensrc/gwxlibs-2.1.0Ba/gwxlibs-2.1.0Ba.txt
5. OpenServer 5.0.7
5.1 Location of Fixed Binaries
ftp://ftp.sco.com/pub/openserver5/507/mp/osr507mp4/osr507mp4_vol.tar
5.2 Verification
MD5 (osr507mp4_vol.tar) = 4c87d840ff5b43221258547d19030228
md5 is available for download from
ftp://ftp.sco.com/pub/security/tools
5.3 Installing Fixed Binaries
See the SCO OpenServer Release 5.0.7 Maintenance Pack 4 Release
and Installation Notes:
ftp://ftp.sco.com/pub/openserver5/507/mp/osr507mp4/osr507mp4.htm
6. OpenServer 6.0.0
6.1 Location of Fixed Binaries
ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2006.3
6.2 Verification
MD5 (VOL.000.000) = b38ae14a80e730498581e6a4ce64aa11
md5 is available for download from
ftp://ftp.sco.com/pub/security/tools
6.3 Installing Fixed Binaries
Upgrade the affected binaries with the following sequence:
1) Download the VOL* files to a directory.
2) Run the custom command, specify an install from media images,
and specify the directory as the location of the images.
7. References
Specific references for this advisory:
http://bugzilla.remotesensing.org/show_bug.cgi
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-1544
http://secunia.com/advisories/15320
http://xforce.iss.net/xforce/xfdb/20533
SCO security resources:
http://www.sco.com/support/security/index.html
SCO security advisories via email
http://www.sco.com/support/forums/security.html
This security fix closes SCO incidents sr894565 fz532776
erg712890 sr894563 fz532777 erg712888.
8. Disclaimer
SCO is not responsible for the misuse of any of the information
we provide on this website and/or through our security
advisories. Our advisories are a service to our customers
intended to promote secure installation and use of SCO
products.
9. Acknowledgments
The SCO Group would like to thank Travis Ormandy.
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