[Pkg-samba-maint] [samba] 07/26: CVE-2013-4408:s4:dcerpc_smb: check for invalid frag_len in send_read_request_continue()

[Ivo De Decker]

This is an automated email from the git hooks/post-receive script.

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

commit e5954aabebc3313443da1d2ac12ef84d96e61a1c
Author: Stefan Metzmacher <metze at samba.org>
Date:   Wed Sep 25 23:25:12 2013 +0200

    CVE-2013-4408:s4:dcerpc_smb: check for invalid frag_len in send_read_request_continue()
    
    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>
---
 source4/librpc/rpc/dcerpc_smb.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/source4/librpc/rpc/dcerpc_smb.c b/source4/librpc/rpc/dcerpc_smb.c
index e02631e..efb76cf 100644
--- a/source4/librpc/rpc/dcerpc_smb.c
+++ b/source4/librpc/rpc/dcerpc_smb.c
@@ -163,6 +163,12 @@ static NTSTATUS send_read_request_continue(struct dcecli_connection *c, DATA_BLO
 	} else {
 		uint32_t frag_length = blob->length>=16?
 			dcerpc_get_frag_length(blob):0x2000;
+
+		if (frag_length < state->data.length) {
+			talloc_free(state);
+			return NT_STATUS_RPC_PROTOCOL_ERROR;
+		}
+
 		state->received = blob->length;
 		state->data = data_blob_talloc(state, NULL, frag_length);
 		if (!state->data.data) {

-- 
Alioth's /usr/local/bin/git-commit-notice on /srv/git.debian.org/git/pkg-samba/samba.git