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authorjoda <joda@NetBSD.org>2002-10-21 19:39:51 +0000
committerjoda <joda@NetBSD.org>2002-10-21 19:39:51 +0000
commitbc13d2aefa316c7253dc3e544c2cc861b8a46ca0 (patch)
tree78d8635838d92e06c4c1ea2945b3551ddf0cec01 /crypto
parent2a89b960772c1c588ddb1b8cbd610c947c7449ba (diff)
don't blindly trust rlen; from Heimdal 0.5.1
Diffstat (limited to 'crypto')
-rw-r--r--crypto/dist/heimdal/kadmin/version4.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/crypto/dist/heimdal/kadmin/version4.c b/crypto/dist/heimdal/kadmin/version4.c
index d2a9b4a9dc9..471cd1d70e2 100644
--- a/crypto/dist/heimdal/kadmin/version4.c
+++ b/crypto/dist/heimdal/kadmin/version4.c
@@ -42,7 +42,7 @@
#include <kadm_err.h>
__RCSID("$Heimdal: version4.c,v 1.26 2002/09/10 15:20:46 joda Exp $"
- "$NetBSD: version4.c,v 1.1.1.4 2002/09/12 12:41:39 joda Exp $");
+ "$NetBSD: version4.c,v 1.2 2002/10/21 19:39:51 joda Exp $");
#define KADM_NO_OPCODE -1
#define KADM_NO_ENCRYPT -2
@@ -823,6 +823,13 @@ decode_packet(krb5_context context,
off += _krb5_get_int(msg + off, &rlen, 4);
memset(&authent, 0, sizeof(authent));
authent.length = message.length - rlen - KADM_VERSIZE - 4;
+
+ if(authent.length >= MAX_KTXT_LEN) {
+ krb5_warnx(context, "received bad rlen (%lu)", (unsigned long)rlen);
+ make_you_loose_packet (KADM_LENGTH_ERROR, reply);
+ return;
+ }
+
memcpy(authent.dat, (char*)msg + off, authent.length);
off += authent.length;