Facebook Google Plus Twitter LinkedIn YouTube RSS Menu Search Resource - BlogResource - WebinarResource - ReportResource - Eventicons_066 icons_067icons_068icons_069icons_070

CVE-2019-2729: Oracle Releases Out-of-Band Patch for WebLogic Server Deserialization Vulnerability

Out-of-band security advisory addresses second Oracle WebLogic Server vulnerability in two months.

Background

On June 18, Oracle published an out-of-band security advisory to address a critical vulnerability in Oracle WebLogic Server.

Analysis

CVE-2019-2729 is a deserialization vulnerability in the XMLDecoder in Oracle WebLogic Server Web Services. An unauthenticated attacker could remotely exploit this vulnerability to gain remote code execution (RCE) on vulnerable systems. This vulnerability follows another deserialization vulnerability, CVE-2019-2725, that was reported as a zero-day on April 17, 2019 and patched on April 26, 2019.

On June 15, researchers from the KnownSec 404 Team published a blog stating they were able to bypass the patch that addressed CVE-2019-2725 in April. The researchers said they found “a new oracle webLogic[sic] deserialization RCE 0day vulnerability” that “is being actively used in the wild” and they had contacted Oracle to inform them of these new developments.

Oracle said in a blog post that,while both CVE-2019-2725 and CVE-2019-2729 are deserialization flaws, CVE-2019-2729 is “a distinct vulnerability.” Following the advisory from Oracle, KnownSec have since updated the June 15 blog to confirm that CVE-2019-2729 addresses the vulnerability they discovered in the wild. 

Attackers moved quickly to incorporate CVE-2019-2725 into campaigns for the Sodinokibi ransomware and GandCrab ransomware and XMRig cryptocurrency miner. Nearly two months later, it continues to be utilized by attackers in another Monero cryptocurrency mining campaign and as part of a new variant of Mirai, the internet-of-things (IoT) malware’s tool kit of exploits. We believe that once proofs-of-concept (PoCs) are available for CVE-2019-2729 it will become another favorite among attackers.

Proof of concept

At the time this blog was published, there was no known PoC code available for CVE-2019-2729. However, the KnownSec 404 Team reports seeing exploitation of this vulnerability in the wild. Tenable anticipates updated PoCs will become available soon.

Solution

Oracle has released fixes for Oracle WebLogic Server versions 10.3.6.0.0 and 12.1.3.0.0. At the time this blog was published, fixes for WebLogic Server 12.2.1.3.0 had not been released.

If patching is not currently feasible, previous mitigations for CVE-2019-2725 are applicable to CVE-2019-2729. These workarounds are:

  • Delete the wls9_async_response.war, wls-wsat.war packages from the WebLogic server, and restart the Weblogic service
  • Restrict access to, or disable, the “/_async/*” and “/wls-wsat/” URL paths on the WebLogic server  

Identifying affected systems

A list of Tenable plugins to identify this vulnerability will appear here as they’re released.

Get more information 

Join Tenable's Security Response Team on the Tenable Community.

Learn more about Tenable, the first Cyber Exposure platform for holistic management of your modern attack surface. Get a free 60-day trial of Tenable.io.

Subscribe to the Tenable Blog

Subscribe
Try for Free Buy Now

Try Tenable.io

FREE FOR 30 DAYS

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Sign up now.

Buy Tenable.io

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

65 assets

$2,275

Buy Now

Try for Free Buy Now

Try Nessus Professional Free

FREE FOR 7 DAYS

Nessus® is the most comprehensive vulnerability scanner on the market today. Nessus Professional will help automate the vulnerability scanning process, save time in your compliance cycles and allow you to engage your IT team.

Buy Nessus Professional

Nessus® is the most comprehensive vulnerability scanner on the market today. Nessus Professional will help automate the vulnerability scanning process, save time in your compliance cycles and allow you to engage your IT team.

Buy a multi-year license and save. Add Advanced Support for access to phone, email, community and chat support 24 hours a day, 365 days a year. Full details here.

Try for Free Buy Now

Try Tenable.io Web Application Scanning

FREE FOR 30 DAYS

Enjoy full access to our latest web application scanning offering designed for modern applications as part of the Tenable.io platform. Safely scan your entire online portfolio for vulnerabilities with a high degree of accuracy without heavy manual effort or disruption to critical web applications. Sign up now.

Buy Tenable.io Web Application Scanning

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

5 FQDNs

$3,578

Buy Now

Try for Free Contact Sales

Try Tenable.io Container Security

FREE FOR 30 DAYS

Enjoy full access to the only container security offering integrated into a vulnerability management platform. Monitor container images for vulnerabilities, malware and policy violations. Integrate with continuous integration and continuous deployment (CI/CD) systems to support DevOps practices, strengthen security and support enterprise policy compliance.

Buy Tenable.io Container Security

Tenable.io Container Security seamlessly and securely enables DevOps processes by providing visibility into the security of container images – including vulnerabilities, malware and policy violations – through integration with the build process.

Learn More about Industrial Security

Get a Demo of Tenable.sc

Please fill out the form below with your contact information and a sales representative will contact you shortly to schedule a demo. You may also include a short comment (limited to 255 characters). Please note that fields with asterisks (*) are mandatory.

Try for Free Contact Sales

Try Tenable Lumin

FREE FOR 30 DAYS

Visualize and explore your Cyber Exposure, track risk reduction over time and benchmark against your peers with Tenable Lumin.

Buy Tenable Lumin

Contact a Sales Representative to see how Lumin can help you gain insight across your entire organization and manage cyber risk.