CVE-2020-1938 – Apache Tomcat AJP Request Injection and potential Remote Code Execution

Published by Apache: 2020-02-24
MITRE CVE-2020-3158

“When using the Apache JServ Protocol (AJP), care must be taken when trusting incoming connections to Apache Tomcat. Tomcat treats AJP connections as having higher trust than, for example, a similar HTTP connection. If such connections are available to an attacker, they can be exploited in ways that may be surprising.”

There is not enough details available yet, but the vulnerability has at least a CVSS Base score of 8.1, High. This depends on how hard it is to exploit, etc.

There is proof of concept published, but as of writing no known public exploitation of this vulnerability.

Basefarm customers will be upgraded as part of normal patching routines.

Basefarm security news

This blog post is a short summary of this week’s Information Security News put together by SecOps team.

Basefarm have started to publish vulnerability bulletin in the blog posts, feel free to share this with our customers:

https://blog.basefarm.com/blog/category/security-blog/vuln-bullet/feed/

 

Top 3 Security News:

CVE-2020-0618 | Microsoft SQL Server Reporting Services Remote Code Execution Vulnerability

Critical Cisco Bug Opens Software Licencing Manager to Remote Attack

You are never secure with a WordPress

CVE-2020-1938: Apache Tomcat AJP Connector Remote Code Execution Vulnerability Alert

 

 

 

CVE-2020-3158 – Cisco Smart Software Manager On-Prem Static Default Credential Vulnerability

Published by Cisco: 2020-02-19
MITRE CVE-2020-3158

“A vulnerability in the High Availability (HA) service of Cisco Smart Software Manager On-Prem could allow an unauthenticated, remote attacker to access a sensitive part of the system with a high-privileged account.”

The vulnerability has a CVSS Base score of 9.8, Critical.

Basefarm has triaged this vulnerability and found that we are not using the Cisco Smart Software Manager On-Prem software. Basefarm will not track this vulnerability further.

VMSA-2020-0003 vRealize Operations for Horizon Adapter updates address multiple security vulnerabilities (CVE-2020-3943, CVE-2020-3944, CVE-2020-3945)

Published by VMware: 2020-02-18
MITRE CVE-2020-3943

“vRealize Operations for Horizon Adapter uses a JMX RMI service which is not securely configured. VMware has evaluated the severity of this issue to be in the Critical severity range with a maximum CVSSv3 base score of 9.0.”

“vRealize Operations for Horizon Adapter has an improper trust store configuration leading to authentication bypass. VMware has evaluated the severity of this issue to be in the Important severity range with a maximum CVSSv3 base score of 8.6.”

“vRealize Operations for Horizon Adapter contains an information disclosure vulnerability due to incorrect pairing implementation between the vRealize Operations for Horizon Adapter and Horizon View. VMware has evaluated the severity of this issue to be in the Moderate severity range with a maximum CVSSv3 base score of 5.3.”

The issue has been evaluated by our VMware technicians and Basefarm has concluded that we do not use Horizon Adapter and our systems are therefor not affected by these vulnerabilities.

ThemeREX Addons – Remote Code Execution (0day, Being Exploited)

Published by Wordfence: 2020-02-18
No known CVE

“This flaw allows attackers to remotely execute code on a site with the plugin installed, including the ability to execute code that can inject administrative user accounts.
This vulnerability has not yet been patched. We are only trying to get the word out so people can remove the plugin temporarily as the vulnerability is being actively exploited. ”

Basefarm considers this a Base CVSS Score: 9.8 (Critical) – there is no fix and it is currently being actively exploited.

Basefarm has done some initial investigations regarding the use of this WordPress Theme, but has not identified any customers or internal usage. Basefarm has decided not to track this vulnerability further internally, but want to make it visible by posting this vulnerability bulletin.

CVE-2020-0618 | Microsoft SQL Server Reporting Services Remote Code Execution Vulnerability

Published by Microsoft: 02/11/2020
MITRE CVE-2020-0618

“A remote code execution vulnerability exists in Microsoft SQL Server Reporting Services when it incorrectly handles page requests. An attacker who successfully exploited this vulnerability could execute code in the context of the Report Server service account.”

There exists a proof of concept and write-up.

Basefarm considers this a Base CVSS Score: 9.8 (Critical) – but there exists an official fix from Microsoft, bringing the Temporal CVSS Score down to a 9.4 (Critical).

And we consider most of our users do not expose Microsoft SQL Server Reporting Service directly to the internet, so this CVSS Environmental Score can be lowered down to a 7.6 (High).

Per Basefarm Vulnerability process we still consider this a priority 1 (of 3) issue, and we will not wait until normal patch window to mitigate this issue. Internally we are tracking this progress in BF-VLN-1990987, registered 2020-02-18.

Cloud security is voodoo?

“Researchers detail the process of finding two flaws in the Azure Stack architecture and Azure App Service, both of which have been patched.”

“Check Point Research analysts who discovered two vulnerabilities in the Microsoft Azure cloud infrastructure have published the details of how these flaws were found and how attackers could potentially use them.”

Read more at darkreading.com

 Top 5 Security News

 

 

(Blogpost image by Animesh Bhattarai on Unsplash)

Vulnerable Citrix Appliances

On December 17, Citrix disclosed a vulnerability in their ADC, Gateway and SD-WAN product lines. Some patches were delivered around January 10, but these patches were not that efficient. A proper patch was not released before January 19 to January 24, depending on the appliance and release train.

Unfortunately, the nature of the vulnerability makes it extremely simple to exploit. That, combined with the fact that these appliances are usually directly connected to the Internet, makes this a serious threat to the overall Internet health. Exploit code has been generally available since about January 11 and there are now multiple, automated scanners deployed that is targeting unpatched appliances. When compromised, the malware is collecting config files and potentially SSL certificates and keys. There has also been attempts at using compromised appliances as stepping stones to move further into the infrastructure.

Basefarm recommend that all such appliances are checked and verified OK as soon as possible. FireEye has released a tool to aid in the verification. This tool can be found on Github. If a box is believed to be compromised, Basefarm recommends that the appliance is disconnected from the Internet immediately and fully replaced with a freshly installed one with all necessary patches in place before the appliance is exposed to the Internet again. All credentials and SSL keys stored on the appliance should be rotated.

The State of Breach Protection 2020

This blog post is a summary of this week’s Information Security News put together by our Security Incident Response Team (SIRT).

“What are the key considerations security decision makers should take into account when designing their 2020 breach protection?”
1,536 cybersecurity professionals has been asked that question and many other security related questions in Cynet’s “The State of Breach Protection 2020″ survey.
The survey report will give a great insight into common practices, prioritizations and preferences of organization today in how their are protecting themselves from breaches.

Download the full survey report here

 

Top 5 Security News

EU privacy fines near £100m, but regulators are hungry for more

Iran-Linked PupyRAT backdoor used in recent attacks on European energy sector

250 Million Microsoft Customer Support Records Exposed Online

NIST’s new privacy rules – what you need to know

Cisco Warns of Critical Network Security Tool Flaw

Windows update

New year, new vulnerabilities

This blog post is a summary of this week’s Information Security News put together by our Security Incident Response Team (SIRT).

The year 2020 started of by throwing out a bunch of new vulnerabilities that needed fixing.
First it was the Citrix vulnerability in Application Delivery Controller and Gateway products, formerly known as netscaler. The vulnerability was technically was released in 2019 as CVE-2019-19781; and allowed an attacker to get arbitrary remote code execution trough a directory traversal. The exploit was really easy to pull of and only needed two web-requests to the gateway, and multiple POC was released early January leading to active exploitation in the wild. Citrix has not yet released a patch for the vulnerability, but instead released a way to mitigate the vulnerability by means of configuration. A patch is expected next week.

Then on Tuesday, 14th of January Microsoft released its monthly patches fixing a bunch of bugs and security issues. In this patch there were two critical vulnerabilities that warranted extra atention. One was dubbed “curveball” and is tracked as CVE-2020-0601. Curveball is a bug in the Windows crypto API(Crypt32.dll) and how Windows Elliptic Curve Cryptography (ECC). The vulnerability allows anyone to present a certificate, and windows will happily acknowledge it as a valid certificate even when it is no. This could let an attacker launch Man-in-the-middle attacks against HTTPS connections, present fake certificates for phishing pages and allow fake signed executables to be launched. The vulnerability affects Windows 10, and Windows server 20016 and later.

Another big one from this patch was the Microsoft RD gateway vulnerability tracked as CVE-2020-0609 allowing arbitrary remote code execution by sending a specially crafted request to the server over the RDP connection. By using this exploit an attacker could get full access to the server by means of installing software, create users with full access rights etc.

There were also multiple other other vulnerabilities fixed, such as CVE-2020-0603 is a critical remote code execution bug in ASP.NET Core allowing an attacker to execute code by getting a user to open a file, and CVE-2020-0636 (Windows Subsystem for Linux (WSL)) allowing a user to run commands with elevated privileges.

In other news, SHA-1 is a Shambles after the first chosen prefix collision for sha1 was done. This means that sha1 is considered unsafe to use for integrity checking as you can create two documents that are completely different, add extra data to make them the same length and then add some specific data to generate the same sha1-sum for both documents. SHA1 should now be avoided for integrity checking of data.

A total of 334 vulnerabilities was patched by Oracle this week, covering many widely used applications like MySQL, VirtualBox, Java and Oracle Database.

On a different note, Windows 7 and windows server 2008(r2) is now end of life as of January 14, and will not get any more security updates. Microsoft wil also up the fees for running these operation systems, so both from a economical and security standpoint it makes sense to upgrade now sooner than later.

To sum up this weeks security news, stay up to date with patching at all times. There is no excuse not to.