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The calculation `hdrSize - dataSize` can underflow the 64-bit unsigned int dataSize type, which can lead to incorrect results. We throw an exception to stop the code from going any further. Addresses https://nvd.nist.gov/vuln/detail/CVE-2018-14325
and calculating the number of bytes needed to hold the list overflows Addresses https://nvd.nist.gov/vuln/detail/CVE-2018-14326 and https://nvd.nist.gov/vuln/detail/CVE-2018-14446
If the atom type has an embedded nul character "\x00", the loop can terminate early and return true (match) when it should return false (no match). This function should only return true if we have reached the loop termination conditions on s2. For example: // These test cases passed before and after this change AssertIsTrue( MP4NameFirstMatches( "sdtp", "sdtp" ) ); // Exact match AssertIsTrue( MP4NameFirstMatches( "trak", "trak[1]" ) ); // Matches up to [ AssertIsTrue( MP4NameFirstMatches( "sdtp", "sdtp." ) ); // Matches up to . AssertIsFalse( MP4NameFirstMatches( "\x00dtp", "sdtp." ) ); // Nul character at s[0] // These test cases failed before this change, and pass after this change AssertIsFalse( MP4NameFirstMatches( "s\x00tp", "sdtp." ) ); // Nul character at s[1] AssertIsFalse( MP4NameFirstMatches( "sd\x00p", "sdtp." ) ); // Nul character at s[2] AssertIsFalse( MP4NameFirstMatches( "sdt\x00", "sdtp." ) ); // Nul character at s[3] Addresses https://nvd.nist.gov/vuln/detail/CVE-2018-14403
If an exception occurs (because of a crafted MP4) before the value is reassigned, then a double free can occur. By setting the pointer to NULL after the first free, we prevent the double free in this case. Addresses: https://nvd.nist.gov/vuln/detail/CVE-2018-14054
I copied what DRO did in his commit for the top of the branch (1695b60), except this one is branched off the last release for Camtasia 9.
Incorporating security fixes for Camtasia 9
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merge errors