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[ GLSA 200908-03 ] libTIFF: User-assisted execution of arbitrary code
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PostPosted: Sat Aug 22, 2009 2:26 am    Post subject: [ GLSA 200908-03 ] libTIFF: User-assisted execution of arbit Reply with quote

Gentoo Linux Security Advisory

Title: libTIFF: User-assisted execution of arbitrary code (GLSA 200908-03)
Severity: normal
Exploitable: remote
Date: August 07, 2009
Bug(s): #276339, #276988
ID: 200908-03

Synopsis


Multiple boundary checking vulnerabilities in libTIFF may allow for the
remote execution of arbitrary code.


Background


libTIFF provides support for reading and manipulating TIFF (Tagged
Image File Format) images.


Affected Packages

Package: media-libs/tiff
Vulnerable: < 3.8.2-r8
Unaffected: >= 3.8.2-r8
Architectures: All supported architectures


Description


Two vulnerabilities have been reported in libTIFF:

  • wololo reported a buffer underflow in the LZWDecodeCompat() function
    (CVE-2009-2285).

  • Tielei Wang of ICST-ERCIS, Peking University reported two integer
    overflows leading to heap-based buffer overflows in the tiff2rgba and
    rgb2ycbcr tools (CVE-2009-2347).


Impact


A remote attacker could entice a user to open a specially crafted TIFF
file with an application making use of libTIFF or the tiff2rgba and
rgb2ycbcr tools, possibly resulting in the execution of arbitrary code
with the privileges of the user running the application.


Workaround


There is no known workaround at this time.


Resolution


All libTIFF users should upgrade to the latest version:
Code:
# emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/tiff-3.8.2-r8"


References

CVE-2009-2285
CVE-2009-2347
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