From 9c025280a68b6666db374e129114d9852433d067 Mon Sep 17 00:00:00 2001 From: Frank Morgner Date: Tue, 31 Oct 2017 09:31:29 +0100 Subject: [PATCH] avoid integer underflow --- src/libopensc/card-sc-hsm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/libopensc/card-sc-hsm.c b/src/libopensc/card-sc-hsm.c index e415a12a..69d1cc9c 100644 --- a/src/libopensc/card-sc-hsm.c +++ b/src/libopensc/card-sc-hsm.c @@ -190,7 +190,7 @@ static int sc_hsm_select_file_ex(sc_card_t *card, return rv; } - if ((in_path->value[0] == 0x3F) && (in_path->value[1] == 0x00)) { + if ((in_path->len >= 2) && (in_path->value[0] == 0x3F) && (in_path->value[1] == 0x00)) { // The SmartCard-HSM is an applet that is not default selected. Simulate selection of the MF if (in_path->len == 2) { file = sc_file_new();