gnu: libevent: Update to 2.1.8 [security fixes].

* gnu/packages/libevent.scm (libevent): Update to 2.1.8.
[inputs]: Change 'python-wrapper' to 'python-2'. Move 'which' to ...
[native-inputs]: ... here. New field.
(libevent-2.0): New variable.
* gnu/packages/patches/libevent-2.1-dns-tests.patch,
  gnu/packages/patches/libevent-2.0-evdns-fix-remote-stack-overread.patch
  gnu/packages/patches/libevent-2.0-evdns-fix-searching-empty-hostnames.patch
  gnu/packages/patches/libevent-2.0-evutil-fix-buffer-overflow.patch: New files.
* gnu/local.mk (dist_patch_DATA): Add them.
* gnu/packages/gnuzilla.scm (icecat)[inputs]: Change 'libevent' to 'libevent-2.0'.

1 files changed, 42 insertions, 0 deletions

diff --git a/gnu/packages/patches/libevent-2.0-evutil-fix-buffer-overflow.patch b/gnu/packages/patches/libevent-2.0-evutil-fix-buffer-overflow.patch
new file mode 100644
index 0000000000..4d16a4b917
--- /dev/null
+++ b/gnu/packages/patches/libevent-2.0-evutil-fix-buffer-overflow.patch
@@ -0,0 +1,42 @@
+Fix buffer overflow in evutil.
+
+Upstream bug report:
+
+https://github.com/libevent/libevent/issues/318
+
+Patch copied from upstream source repository:
+
+https://github.com/libevent/libevent/commit/329acc18a0768c21ba22522f01a5c7f46cacc4d5
+
+From 28bdc2f3f62259d21ccaf7be2b60ef0a53e6f342 Mon Sep 17 00:00:00 2001
+From: Azat Khuzhin <[email protected]>
+Date: Sun, 31 Jan 2016 00:57:16 +0300
+Subject: [PATCH] evutil_parse_sockaddr_port(): fix buffer overflow
+
+---
+ evutil.c | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/evutil.c b/evutil.c
+index 33445170..e2dfe6e4 100644
+--- a/evutil.c
++++ b/evutil.c
+@@ -1808,12 +1808,12 @@ evutil_parse_sockaddr_port(const char *ip_as_string, struct sockaddr *out, int *
+ 
+ 	cp = strchr(ip_as_string, ':');
+ 	if (*ip_as_string == '[') {
+-		int len;
++		size_t len;
+ 		if (!(cp = strchr(ip_as_string, ']'))) {
+ 			return -1;
+ 		}
+-		len = (int) ( cp-(ip_as_string + 1) );
+-		if (len > (int)sizeof(buf)-1) {
++		len = ( cp-(ip_as_string + 1) );
++		if (len > sizeof(buf)-1) {
+ 			return -1;
+ 		}
+ 		memcpy(buf, ip_as_string+1, len);
+-- 
+2.11.0
+