Submeter #544226: Open Source STB Project (https://github.com/nothings/stb) Latest (<= commit f056911) stbhw_build_tileset_from_image Out-of-Bounds Read

Out-of-Bounds read via user-controlled index. The variable `w` is supplied by the user and directly influences the arithmetic used to determine which element of `data` is read into the local `header` array. If `w` is set to an unexpected or small value, the computed index (`w*3 - 1 - i`) can fall outside the bounds of the provided `data` buffer, resulting in an out-of-bounds read.

STBHW_EXTERN int stbhw_build_tileset_from_image(stbhw_tileset *ts, unsigned char *data, int stride, int w, int h)
{
// ...
unsigned char header[9];
// ...
for (i = 0; i < 9; ++i) {
// w is controlled by the user, affecting the read index:
header[i] = data[w*3 - 1 - i] ^ (i * 55);
}
// ...
}

• Utilizador: ninpwn (UID 82253)
• Submissão: 27/03/2025 15h49 (há 2 anos)
• Moderação: 07/04/2025 12h56 (11 days later)
• Estado: Aceite
• Entrada VulDB: 303684 [Nothings stb até f056911 Header Array stbhw_build_tileset_from_image w Divulgação de Informação]
• Pontos: 17