UTF8_getc(): Fail with UTF8 values outside UNICODE_LIMIT

Reported by Aniruddhan Murali

Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Norbert Pocs <norbertp@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/29119)

diff --git a/crypto/asn1/a_utf8.c b/crypto/asn1/a_utf8.c
index 6572726cf1e5a89c09ab238d775e21c40272fe46..0a6024ffa454e513e14b16676b8990aec565cdc2 100644 (file)
--- a/crypto/asn1/a_utf8.c
+++ b/crypto/asn1/a_utf8.c
@@ -73,7 +73,7 @@ int UTF8_getc(const unsigned char *str, int len, unsigned long *val)
         value |= (*p++ & 0x3f) << 12;
         value |= (*p++ & 0x3f) << 6;
         value |= *p++ & 0x3f;
-        if (value < 0x10000)
+        if (value < 0x10000 || value >= UNICODE_LIMIT)
             return -4;
         ret = 4;
     } else