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The Mem_File_Reader::read_avail function in Data_Reader.cpp in the Game_Music_Emu library (aka game-music-emu) 0.6.1 does not ensure a non-negative size, which allows remote attackers to cause a denial of service (application crash) via a crafted file.
The Mem_File_Reader::read_avail function in Data_Reader.cpp in the Game_Music_Emu library (aka game-music-emu) 0.6.1 does not ensure a non-negative size, which allows remote attackers to cause a denial of service (application crash) via a crafted file.
CVSS 3.0 Base Score 6.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H).
CVSS 2.0 Base Score 4.3. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:P).
In the following Java example, a float literal is cast to an integer, thus causing a loss of precision.
int i = (int) 33457.8f;This code adds a float and an integer together, casting the result to an integer.
$result = (int)$floatVal + $intVal;Normally, PHP will preserve the precision of this operation, making $result = 4.8345. After the cast to int, it is reasonable to expect PHP to follow rounding convention and set $result = 5. However, the explicit cast to int always rounds DOWN, so the final value of $result is 4. This behavior may have unintended consequences.
In this example the variable amount can hold a negative value when it is returned. Because the function is declared to return an unsigned int, amount will be implicitly converted to unsigned.
}return amount;If the error condition in the code above is met, then the return value of readdata() will be 4,294,967,295 on a system that uses 32-bit integers.
In this example, depending on the return value of accecssmainframe(), the variable amount can hold a negative value when it is returned. Because the function is declared to return an unsigned value, amount will be implicitly cast to an unsigned number.
}return amount;If the return value of accessmainframe() is -1, then the return value of readdata() will be 4,294,967,295 on a system that uses 32-bit integers.
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