[Pkg-samba-maint] [samba] 02/26: CVE-2013-4408:librpc: check for invalid frag_len within dcerpc_read_ncacn_packet_done()

[Ivo De Decker]

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idd-guest pushed a commit to branch samba_4.1
in repository samba.

commit 78b49899e75cd692c595bf1ce5ed4158a97673e6
Author: Stefan Metzmacher <metze at samba.org>
Date:   Tue Sep 24 05:03:40 2013 +0200

    CVE-2013-4408:librpc: check for invalid frag_len within dcerpc_read_ncacn_packet_done()
    
    Bug: https://bugzilla.samba.org/show_bug.cgi?id=10185
    
    Signed-off-by: Stefan Metzmacher <metze at samba.org>
    Reviewed-by: Jeremy Allison <jra at samba.org>
---
 librpc/rpc/dcerpc_util.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/librpc/rpc/dcerpc_util.c b/librpc/rpc/dcerpc_util.c
index de292c8..458ecc5 100644
--- a/librpc/rpc/dcerpc_util.c
+++ b/librpc/rpc/dcerpc_util.c
@@ -292,6 +292,11 @@ static void dcerpc_read_ncacn_packet_done(struct tevent_req *subreq)
 		return;
 	}
 
+	if (state->pkt->frag_length != state->buffer.length) {
+		tevent_req_nterror(req, NT_STATUS_RPC_PROTOCOL_ERROR);
+		return;
+	}
+
 	tevent_req_done(req);
 }
 

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