TITLE:
Xpdf Multiple Buffer Overflow Vulnerabilities

SECUNIA ADVISORY ID:
SA17897

VERIFY ADVISORY:
http://secunia.com/advisories/17897/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
Xpdf 3.x
http://secunia.com/product/4128/

DESCRIPTION:
infamous41md has reported some vulnerabilities in xpdf, which can be
exploited by malicious people to cause a DoS (Denial of Service) and
potentially to compromise a user's system.

1) A boundary error exists in the "DCTStream::readBaselineSOF()"
function in "xpdf/Stream.cc" when copying data from a PDF file to a
heap-based buffer. This can be exploited to cause a heap-based buffer
overflow via a specially crafted PDF file with an overly large
"numComps" value.

2) A boundary error exists in the "DCTStream::readProgressiveSOF()"
function in "xpdf/Stream.cc" when copying data from a PDF file to a
heap-based buffer. This can be exploited to cause a heap-based buffer
overflow via a specially crafted PDF file with an overly large
"numComps" value.

3) An error exists in the "StreamPredictor::StreamPredictor()"
function in "xpdf/Stream.cc" when using the "numComps" value to
calculate the memory size to be allocated by "gmalloc()". This can be
exploited to cause "gmalloc()" to allocate less memory than required,
which will lead to a heap-based buffer overflow when data is copied
from the PDF file to the allocated memory.

4) An error exists in the "JPXStream::readCodestream()" function in
"xpdf/JPXStream.cc" when  using the "nXTiles" and "nYTiles" values
from a PDF file to copy data from the file into allocated memory.
This can be exploited to cause a heap-based buffer overflow via a
specially crafted PDF file with overly large "nXTiles" and "nYTiles"
values.

Successful exploitation of the vulnerabilities requires that the user
is e.g. tricked into opening a malicious PDF file.

The vulnerabilities have been reported in version 3.01. Prior
versions may also be affected.

SOLUTION:
Update to version 3.01pl1.
http://www.foolabs.com/xpdf/download.html

PROVIDED AND/OR DISCOVERED BY:
infamous41md

ORIGINAL ADVISORY:
iDEFENSE:
http://www.idefense.com/application/poi/display?id=342&type=vulnerabilities
http://www.idefense.com/application/poi/display?id=343&type=vulnerabilities
http://www.idefense.com/application/poi/display?id=344&type=vulnerabilities
http://www.idefense.com/application/poi/display?id=345&type=vulnerabilities

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