rsyslog: fix CVE-2019-17041

Backport fix to zeus; master branch already has v8.1910.0

Signed-off-by: Trevor Gamblin <trevor.gamblin@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-extended/rsyslog/rsyslog/0001-pmaixforwardedfrom-bugfix-potential-misadressing.patch

@@ -0,0 +1,43 @@
+From 10549ba915556c557b22b3dac7e4cb73ad22d3d8 Mon Sep 17 00:00:00 2001
+From: Rainer Gerhards <rgerhards@adiscon.com>
+Date: Fri, 27 Sep 2019 13:36:02 +0200
+Subject: [PATCH] pmaixforwardedfrom bugfix: potential misadressing
+
+---
+ contrib/pmaixforwardedfrom/pmaixforwardedfrom.c | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+Upstream-Status: Backport [https://github.com/rsyslog/rsyslog/pull/3884]
+CVE: CVE-2019-17041
+Signed-off-by: Trevor Gamblin <trevor.gamblin@windriver.com>
+
+diff --git a/contrib/pmaixforwardedfrom/pmaixforwardedfrom.c b/contrib/pmaixforwardedfrom/pmaixforwardedfrom.c
+index 37157c7d4..ebf12ebbe 100644
+--- a/contrib/pmaixforwardedfrom/pmaixforwardedfrom.c
++++ b/contrib/pmaixforwardedfrom/pmaixforwardedfrom.c
+@@ -109,6 +109,10 @@ CODESTARTparse
+ 	/* bump the message portion up by skipLen(23 or 5) characters to overwrite the "Message forwarded from
+ " or "From " with the hostname */
+ 	lenMsg -=skipLen;
++	if(lenMsg < 2) {
++		dbgprintf("not a AIX message forwarded from message has nothing after header\n");
++		ABORT_FINALIZE(RS_RET_COULD_NOT_PARSE);
++	}
+ 	memmove(p2parse, p2parse + skipLen, lenMsg);
+ 	*(p2parse + lenMsg) = '\n';
+ 	*(p2parse + lenMsg + 1)  = '\0';
+@@ -120,6 +124,11 @@ really an AIX log, but has a similar preamble */
+ 		--lenMsg;
+ 		++p2parse;
+ 	}
++	if (lenMsg < 1) {
++		dbgprintf("not a AIX message forwarded from message has nothing after colon "
++			"or no colon at all\n");
++		ABORT_FINALIZE(RS_RET_COULD_NOT_PARSE);
++	}
+ 	if (lenMsg && *p2parse != ':') {
+ 	DBGPRINTF("not a AIX message forwarded from mangled log but similar enough that the preamble has "
+ 		"been removed\n");
+-- 
+2.17.1
+

meta-oe/recipes-extended/rsyslog/rsyslog_8.1908.0.bb

@@ -24,6 +24,7 @@ SRC_URI = "http://www.rsyslog.com/download/files/download/rsyslog/${BPN}-${PV}.t
            file://use-pkgconfig-to-check-libgcrypt.patch \
            file://run-ptest \
            file://0001-Out-of-bounds-issue.patch \
+           file://0001-pmaixforwardedfrom-bugfix-potential-misadressing.patch \
 "
 
 SRC_URI_append_libc-musl = " \