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commit 089a51061b1be809f278ab4e9a741d0a44e52750
Author: Gerald (Jerry) Carter <jerry@samba.org>
Date: Wed Nov 14 20:51:14 2007 -0600
Fix for CVE-2007-5398.
== Subject: Remote code execution in Samba's WINS
== server daemon (nmbd) when processing name
== registration followed name query requests.
==
== CVE ID#: CVE-2007-5398
==
== Versions: Samba 3.0.0 - 3.0.26a (inclusive)
...
Secunia Research reported a vulnerability that allows for
the execution of arbitrary code in nmbd. This defect may
only be exploited when the "wins support" parameter has
been enabled in smb.conf.
diff --git a/source/nmbd/nmbd_packets.c b/source/nmbd/nmbd_packets.c
index 87a38b9..bbcc1ec 100644
--- a/source/nmbd/nmbd_packets.c
+++ b/source/nmbd/nmbd_packets.c
@@ -963,6 +963,12 @@ for id %hu\n", packet_type, nmb_namestr(&orig_nmb->question.question_name),
nmb->answers->ttl = ttl;
if (data && len) {
+ if (len < 0 || len > sizeof(nmb->answers->rdata)) {
+ DEBUG(5,("reply_netbios_packet: "
+ "invalid packet len (%d)\n",
+ len ));
+ return;
+ }
nmb->answers->rdlength = len;
memcpy(nmb->answers->rdata, data, len);
}
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