19 lines
472 B
Diff
19 lines
472 B
Diff
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diff --git a/src/gd_xbm.c b/src/gd_xbm.c
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index 4ca41acf..cf0545ef 100644
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--- a/src/gd_xbm.c
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+++ b/src/gd_xbm.c
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@@ -169,7 +169,11 @@ BGD_DECLARE(gdImagePtr) gdImageCreateFromXbm(FILE * fd)
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}
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h[3] = ch;
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}
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- sscanf(h, "%x", &b);
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+ if (sscanf(h, "%x", &b) != 1) {
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+ gd_error("invalid XBM");
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+ gdImageDestroy(im);
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+ return 0;
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+ }
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for (bit = 1; bit <= max_bit; bit = bit << 1) {
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gdImageSetPixel(im, x++, y, (b & bit) ? 1 : 0);
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if (x == im->sx) {
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