Add static check in BN_hex2bn

Fixes openssl#17298 Reviewed-by: Tomas Mraz <[email protected]> Reviewed-by: Paul Dale <[email protected]> (Merged from openssl#17299)
eckserah · Dec 23, 2021 · 7c78bd4 · 7c78bd4
1 parent a595e32
commit 7c78bd4
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/crypto/bn/bn_conv.c b/crypto/bn/bn_conv.c
@@ -154,6 +154,10 @@ int BN_hex2bn(BIGNUM **bn, const char *a)
             return 0;
     } else {
         ret = *bn;
+        if (BN_get_flags(ret, BN_FLG_STATIC_DATA)) {
+            ERR_raise(ERR_LIB_BN, ERR_R_PASSED_INVALID_ARGUMENT);
+            return 0;
+        }
         BN_zero(ret);
     }