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    Rewterz Threat Advisory – CVE-2019-11634 – Citrix Workspace / Receiver for Windows Remote Code Execution Vulnerability

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    Rewterz Threat Advisory – CVE-2019-11634 – Citrix Workspace / Receiver for Windows Remote Code Execution Vulnerability

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    March 17, 2023
    March 17, 2023
    Rewterz Threat Alert – Chaos Ransomware – Active IOCs
    Severity High Analysis Summary Chaos is a customizable ransomware builder that emerged on June 9 2021 (in underground forums) by falsely marketing itself as the .NET […]
    March 17, 2023
    March 17, 2023
    Rewterz Threat Advisory – Multiple Adobe ColdFusion Vulnerabilities
    Severity High Analysis Summary CVE-2023-26361 CVSS:4.9 Adobe ColdFusion could allow a remote authenticated attacker to traverse directories on the system. An attacker could send a specially […]
    March 17, 2023
    March 17, 2023
    Rewterz Threat Alert – Ursnif Banking Trojan aka Gozi – Active IOCs
    Severity Medium Analysis Summary Ursnif banking trojan also known as Gozi and Dreambot has been around for more than 10 years. It gained popularity in 2015 […]

    Threat Insights

    16
    pdf-file (1)
    Annual Threat Intelligence Report 2022
    • Threat Advisories
    • Monthly Threat Insights
    • Threat Intelligence Reports
  • Why Rewterz?

    About Us

    Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.

    Read More

    play_btn_Smallplay_btn_hover_Small
    leadership

    Our Leadership

    Our leadership team brings together years of knowledge and experience in cybersecurity to drive our company's mission and vision. Our team is passionate about delivering high-quality products and services, leading by example and assisting our clients in securing their organization’s environment.
    help

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    At Rewterz, we believe that businesses have a responsibility to impact positively and contribute to the well-being of our communities as well as the planet. That's why we are committed to operating in a socially responsible and sustainable way.

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May 16, 2019

Rewterz Threat Advisory – CVE-2019-11634 – Citrix Workspace / Receiver for Windows Remote Code Execution Vulnerability

May 16, 2019

Severity

Medium

Analysis Summary

A vulnerability has been identified in Citrix Workspace app and Receiver (for Windows only) that could result in local drive access preferences not being enforced allowing an attacker read/write access to the clients local drives which could enable code execution on the client device. 

The vulnerability allows bypass of the general user authentication normally required to allow read/write access. When it’s exploited via Microsoft Edge and Microsoft Internet Explorer, there is zero interaction required in all cases. Whereas exploitation via Google Chrome and Mozilla Firefox may require a single user click depending on configuration.

Impact

  • Data Exfiltration
  • Remote Code Execution

Affected Vendors

Citrix

Affected Products

Citrix Workspace App versions prior to 1904
Receiver for Windows versions prior to LTSR 4.9 CU6 version 4.9.6001

Remediation

Upgrade Citrix Workspace app to version 1904 or later and Receiver for Windows to LTSR 4.9 CU6 version 4.9.6001.

The new Citrix Workspace app version is available from the following Citrix website location:

https://www.citrix.com/downloads/workspace-app/

The new LTSR version is available from the following Citrix website location:

https://www.citrix.com/downloads/citrix-receiver/windows-ltsr/receiver-for-windows-ltsr-latest.html

Platform

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Managed Security Services

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Assess

  • Compromise Assessment
  • APT Assessment
  • Penetration Testing
  • Architecture Design & Review
  • Red Team Assessment
  • Purple Team Assessment
  • Social Engineering
  • Source Code Review

Transform

  • SOC Consultancy
  • SOC Maturity Assessment
  • SOC Model Evaluation
  • SOC Gap Analysis
  • SIEM Gap Analysis
  • SIEM Optimization
  • SOC Content Pack

Train

  • Simulated Cyber Attack Exercise
  • Tabletop Exercise
  • Security Awareness and Training

Respond

  • Incident Analysis
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Threat Insights

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  • Monthly Threat Insights
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Connect With Us

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