107 lines
No EOL
2.7 KiB
Text
107 lines
No EOL
2.7 KiB
Text
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Luigi Auriemma
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Application: Cytel Studio: StatXact / LogXact / CrossOver
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http://www.cytel.com/Software/LogXact.aspx
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http://www.cytel.com/Software/StatXact.aspx
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http://www.cytel.com/Software/Crossover.aspx
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Versions: <= 9.0.0
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Platforms: Windows
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Bugs: A] strings stack overflow
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B] rows integer overflow
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C] CYB USE stack overflow
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Exploitation: file
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Date: 02 Oct 2011
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Author: Luigi Auriemma
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e-mail: aluigi@autistici.org
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web: aluigi.org
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1) Introduction
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2) Bugs
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3) The Code
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4) Fix
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#######################################################################
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===============
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1) Introduction
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===============
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From vendor's website:
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"Cytel, the acknowledged leader in exact statistical methods, helped
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pioneer exact methods for binary logistic regression and multinomial
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regression."
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"First introduced in 1987, LogXact is unequivocally the fastest and
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most powerful logistic regression analysis software available today."
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"With StatXact, Cytel's own powerful algorithms make exact inferences
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by permuting the actually observed data, eliminating the need for
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distributional assumptions."
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#######################################################################
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=======
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2) Bugs
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=======
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-------------------------
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A] strings stack overflow
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-------------------------
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Buffer overflow during the copying of the strings in a stack buffer
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of 256 bytes.
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------------------------
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B] rows integer overflow
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------------------------
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There is an integer overflow in the handling of the rows.
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The number of rows (first element of the second line in the file) is
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multiplied by the size of the elements (8 for floats, 4 for strings
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and so on) and the allocated memory gets overflowed when the elements
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are copied one by one.
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At the moment I have not seen ways to exploit this vulnerability to
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execute code so I report it just as reference.
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Both the A and B problems are exploitable with the CY3 ("StatXact 5.0
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data") and the CYL ("LogXact data") files.
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-------------------------
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C] CYB USE stack overflow
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-------------------------
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Stack overflow in the handling of the USE command of the CYB files.
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#######################################################################
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===========
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3) The Code
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===========
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http://aluigi.org/poc/cytel_1.zip
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https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/17930.zip
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#######################################################################
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======
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4) Fix
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======
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No fix.
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####################################################################### |