iscsi-initiator-utils: CVE-2017-17840

Backport CVE patches from the github upstream:
https://github.com/open-iscsi/open-iscsi
commit as follows:
e313bd648a4c8a9526421e270eb597a5de1e0c7f
b9c33683bdc0aed28ffe31c3f3d50bf5cdf519ea
be58eed849f5457bb49b79e94aa6a26971ba6deb
5504053cc08df38d8d85032fa1691e363dfcfb92
85f647c4300a888bb6cbc27f33138549cab617e3
a7a96131bd2ea342f6def0e46be514baf8037ae8
59ede2cf4eee8729a4221000a5d1ecdd312a31ac

https://nvd.nist.gov/vuln/detail/CVE-2017-17840

A local attacker can cause the iscsiuio server to abort or potentially
execute code by sending messages with incorrect lengths, which (due to
lack of checking) can lead to buffer overflows, and result in aborts
(with overflow checking enabled) or code execution.
The process_iscsid_broadcast function in iscsiuio/src/unix/iscsid_ipc.c
does not validate the payload length before a write operation

Signed-off-by: Zhixiong Chi <zhixiong.chi@windriver.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/meta-networking/recipes-daemons/iscsi-initiator-utils/files/0002-iscsiuio-should-ignore-bogus-iscsid-broadcast-packet.patch b/meta-networking/recipes-daemons/iscsi-initiator-utils/files/0002-iscsiuio-should-ignore-bogus-iscsid-broadcast-packet.patch
new file mode 100644
index 0000000000..1f5202ec02
--- /dev/null
+++ b/meta-networking/recipes-daemons/iscsi-initiator-utils/files/0002-iscsiuio-should-ignore-bogus-iscsid-broadcast-packet.patch
@@ -0,0 +1,39 @@
+From 035bb16845537351e1bccb16d38981754fd53129 Mon Sep 17 00:00:00 2001
+From: Lee Duncan <lduncan@suse.com>
+Date: Fri, 15 Dec 2017 10:37:56 -0800
+Subject: [PATCH 2/7] iscsiuio should ignore bogus iscsid broadcast packets
+
+When iscsiuio is receiving broadcast packets from iscsid,
+if the 'payload_len', carried in the packet, is too
+large then ignore the packet and print a message.
+Found by Qualsys.
+
+CVE: CVE-2017-17840
+
+Upstream-Status: Backport
+
+Signed-off-by: Zhixiong Chi <zhixiong.chi@windriver.com>
+---
+ iscsiuio/src/unix/iscsid_ipc.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/iscsiuio/src/unix/iscsid_ipc.c b/iscsiuio/src/unix/iscsid_ipc.c
+index 08e49e5..dfdae63 100644
+--- a/iscsiuio/src/unix/iscsid_ipc.c
++++ b/iscsiuio/src/unix/iscsid_ipc.c
+@@ -950,6 +950,12 @@ int process_iscsid_broadcast(int s2)
+ 
+ 	cmd = data->header.command;
+ 	payload_len = data->header.payload_len;
++	if (payload_len > sizeof(data->u)) {
++		LOG_ERR(PFX "Data payload length too large (%d). Corrupt payload?",
++				payload_len);
++		rc = -EINVAL;
++		goto error;
++	}
+ 
+ 	LOG_DEBUG(PFX "recv iscsid request: cmd: %d, payload_len: %d",
+ 		  cmd, payload_len);
+-- 
+1.9.1
+