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fixed out of bounds read 

fixes https://oss-fuzz.com/testcase-detail/5769032858075136
This commit is contained in:
Frank Morgner 2020-05-24 23:45:38 +02:00
parent d4a9405bf4
commit 0a17188710
1 changed files with 4 additions and 0 deletions
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4
src/libopensc/card-coolkey.c
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@ -1768,6 +1768,10 @@ static int coolkey_rsa_op(sc_card_t *card,
} else {
size_t out_length = bebytes2ushort(buf);
if (out_length > sizeof buf - 2) {
r = SC_ERROR_WRONG_LENGTH;
goto done;
}
out_length = MIN(out_length, max_out_len);
memcpy(out, buf+2, out_length);
r = out_length;