UnshortenLink, SSRF and Cortex-Analyzers 1.15.2

We urge our fellow fighters of cybercrime and funny and not-so-funny animals-in-disguise, to update their Cortex analyzers to the latest 1.15.2 version which plugs a serious vulnerability in the Unshortenlink analyzer and fixes several bugs.

Unshortenlink Vulnerability

On Jan 24, Alexandre Basquin discovered a SSRF vulnerability in the Unshortenlink 1.0 analyzer. By exploiting it, an attacker which has access to a Cortex instance with an analyze role can scan the ports of localhost and possibly of all the hosts reachable by Cortex. This could be automated through Cortex4py by making repetitive calls to the API and thus scanning multiple ports & hosts. In essence, the attacker can perform reconnaissance thanks to Unshortenlink and gain knowledge on which ports are open and which aren’t.

Version 1.1 of Unshortenlink, included in Cortex-Analyzers 1.15.2, plugs this vulnerability by disabling submissions containing IPs & ports. Only URLs are now accepted.

Bug Fixes

Additionally, Cortex-Analyzers 1.15.2 corrects the following bugs:

#416: the Mailer responder now supports UTF-8 encoding.
#410: remove wrapping of the results produced by crt.sh as a list which ends up breaking the output of the report template. Contributed by Thomas Kastner.
#409: enum is not required for Python 3.4+ to make the MISP Search analyzer work.
#408: FileInfo’s Manalyze plugin did not work after Manalyze renamed plugin_btcaddress to plugin_cryptoaddress.
#406: fix a broken link in the Cymon_Check_IP report, submitted by Manabu Niseki.
#313: fix wrong file handling in OTXQuery.

How to Update your Analyzers?

To update your analyzers to version 1.15.2, please read the Updating section of the Cortex installation guide.

Since the version numbers of few analyzers have changed, you’ll need to connect as an orgadmin to Cortex to refresh the analyzer list, disabling old ones and enabling the new versions.

TheHive Report Templates

If you are using TheHive, you must import the new report templates in your instance as follows:

download the updated package
log in TheHive using an administrator account
go to Admin > Report templates menu
click on Import templates button and select the downloaded package

Wait a Minute! Where’s the Blog Post about 1.15.1?

Good catch! There was no blog post about Cortex-Analyzers 1.15.1. Call us lazy but there was nothing Earth-shattering, pole-shifting in that release. Nonetheless, here are a list of fixes included in that release and from which you’ll inherit automatically if you update 1.15.0 to 1.15.2 directly:

#402: Malwares analyzer code relied on functionality that’s only available in Python 3.7+. It has been fixed to work with 3.4 and up thanks to the work of Arcuri Davide.
#404: fixes a bad folder renaming in the HIBP (Have I Been Pwned) analyzer.
#398: MISP Search analyzer wouldn’t run without the enum dependency. Contributed by Mars Huang. Later improved in 1.15.2 (see above).

No Luck Luke?

If something does not work as expected, keep calm and ask on our user forum, reach out to fellow users on Gitter, or send us an email at support@thehive-project.org.

Cortex 2.1.3: Security and Beyond

TheHive Project’s code Chefs are happy to announce the immediate availability of Cortex 2.1.3, a hotfix for your favorite observable and response engine, fresh out of the oven!

We highly recommend that you upgrade your existing installation to this new version as soon as feasible as it plugs a significant security vulnerability, kindly reported by Po-Hsing Wu. The vulnerability is a privilege escalation one which allows an orgadmin to create a superadmin user. The culprit has been punished by having to chant Perl mantras while doing a handstand on burning coals.

: Source : XKCD

Additionally, Cortex 2.1.3 fixes the following bugs:

#157: list and disable invalid responders
#152: enforce PAP when launching an analyzer from the Cortex Web UI
#147: add dig to the Cortex docker image as the SinkDB analyzer needs it
#146: the Cortex job list must display the PAP value
#145: fix the broken Web UI’s search function for job history

Pardon my French but do you speak English?

Something does not work as expected? You have troubles installing or upgrading? Spotted new bugs? No worries, please open issues on GitHub or comment on existing ones, join our user forum, contact us on Gitter, or send us an email at support@thehive-project.org. We are here to help.

Privilege Escalation Vulnerability in All Versions of TheHive

Jeffrey Everling has identified a nasty privilege escalation vulnerability in all versions of TheHive, including Mellifera 13.2 (TheHive 2.13.2) and Cerana 0.2 (TheHive 3.0.2). Jeffrey reported it to us today Friday, Dec 22, 2017. Thanks but we could think of a better Christmas gift 😉

The vulnerability allows users with read-only or read/write access to escalate their privileges and eventually become administrators. To exploit it, an attacker must have access to an account on TheHive with read-only or read/write privileges.

The attacker needs to interact with the API in a specific though trivial way to obtain administrator privileges. After verifying that their request has been correctly processed, they connect to TheHive using the Web UI and they will see the administrator menu from where they can edit or lock user accounts, add case templates, etc.

We highly recommend you update TheHive to Cerana 0.3 (TheHive 3.0.3) which fixes the vulnerability. If you are still using Mellifera and have not made the move to Cerana yet, please update to Mellifera 13.3 (TheHive 2.13.3) which also corrects this flaw.

If you cannot immediately apply the hotfixes we have released, we have created a shell script that will allow you to spot anyone who exploited the vulnerability. You can download the script from the following location:

https://drive.google.com/file/d/1F8VOUMLoCVnIdHjnbhMTzf_9Z2Ud_Vuw/view?usp=sharing

The SHA256 hash of the script is:

18c74f921b92cc68ea7bc10c7522691d671074331191fe22269cc936bfdb0e9a

When you run the script, it will display all users that have changed their roles. If a single match is found, it means your instance has been potentially compromised. We advise you to create a crontab which will execute the script on a regular basis until you apply the hotfixes.

To Upgrade to Cerana 0.3 (TheHive 3.0.3)

Start by following the migration guide.

If you are performing a fresh installation, read the installation guide corresponding to your needs and enjoy. Please note that you can install TheHive using an RPM or DEB package, use Docker, install it from a binary or build it from sources.

To Upgrade to Mellifera 13.3 (TheHive 2.13.3)

DEB Package

wget https://dl.bintray.com/cert-bdf/debian/TheHive_2.13.3-1_all.debdpkg -i TheHive_2.13.3-1_all.deb

The SHA256 hash of the DEB package is:

68c606fb9cbd56f63ba1f2d29c7f7652f4848c7783a6da574532bed0c963829b

RPM Package

wget https://dl.bintray.com/cert-bdf/rpm/thehive-2.13.3-1.noarch.rpm
rpm -Uvh thehive-2.13.3-1.noarch.rpm

The SHA256 hash of the RPM package is:

e566418bf861b2bf28842cf92f5c5d475c98fee1a3ae0d65e3990fd061a0bce0

Docker

docker run certbdf/thehive:2.13.3-1

Binary Package

wget https://dl.bintray.com/cert-bdf/thehive/thehive-2.13.3.zip

The SHA256 hash of the binary package is:

54c589f929744096b50d01264b9d4cc8b9e3d30d397fe810879b4d16b81287c1

Unzip the file in the folder of your choosing.

Support

Something does not work as expected? You have troubles installing or upgrading? No worries, please join our user forum, contact us on Gitter, or send us an email at support@thehive-project.org. We are here to help.