From aec1b6bfcbe1345eb10d8d104cb0d7dfc1f44423 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Mon, 4 Dec 2017 09:56:32 +0100
Subject: samba36: backport an upstream fix for an information leak
(CVE-2017-15275)
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
package/network/services/samba36/Makefile | 2 +-
.../samba36/patches/029-CVE-2017-15275.patch | 40 ++++++++++++++++++++++
2 files changed, 41 insertions(+), 1 deletion(-)
create mode 100644 package/network/services/samba36/patches/029-CVE-2017-15275.patch
(limited to 'package/network')
diff --git a/package/network/services/samba36/Makefile b/package/network/services/samba36/Makefile
index 5564a78404..42c23b4e8e 100644
--- a/package/network/services/samba36/Makefile
+++ b/package/network/services/samba36/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=samba
PKG_VERSION:=3.6.25
-PKG_RELEASE:=8
+PKG_RELEASE:=9
PKG_SOURCE_URL:=https://download.samba.org/pub/samba \
https://download.samba.org/pub/samba/stable
diff --git a/package/network/services/samba36/patches/029-CVE-2017-15275.patch b/package/network/services/samba36/patches/029-CVE-2017-15275.patch
new file mode 100644
index 0000000000..055a15e87e
--- /dev/null
+++ b/package/network/services/samba36/patches/029-CVE-2017-15275.patch
@@ -0,0 +1,40 @@
+From c1a22e59f87783d88dfbaeeb132b89be166b2754 Mon Sep 17 00:00:00 2001
+From: Jeremy Allison <jra@samba.org>
+Date: Wed, 20 Sep 2017 11:04:50 -0700
+Subject: [PATCH 2/2] s3: smbd: Chain code can return uninitialized memory when
+ talloc buffer is grown.
+
+Ensure we zero out unused grown area.
+
+CVE-2017-15275
+
+BUG: https://bugzilla.samba.org/show_bug.cgi?id=13077
+
+Signed-off-by: Jeremy Allison <jra@samba.org>
+---
+ source3/smbd/srvstr.c | 14 ++++++++++++++
+ 1 file changed, 14 insertions(+)
+
+--- a/source3/smbd/srvstr.c
++++ b/source3/smbd/srvstr.c
+@@ -70,6 +70,20 @@ ssize_t message_push_string(uint8 **outb
+ DEBUG(0, ("srvstr_push failed\n"));
+ return -1;
+ }
++
++ /*
++ * Ensure we clear out the extra data we have
++ * grown the buffer by, but not written to.
++ */
++ if (buf_size + result < buf_size) {
++ return -1;
++ }
++ if (grow_size < result) {
++ return -1;
++ }
++
++ memset(tmp + buf_size + result, '\0', grow_size - result);
++
+ set_message_bcc((char *)tmp, smb_buflen(tmp) + result);
+
+ *outbuf = tmp;
--
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