External risk intelligence

Pulse Connect Secure Command Injection Vulnerability.

CVE advisoryKnown Exploit

CVE-2019-11539

An authenticated attacker could exploit a command injection vulnerability in the Pulse Secure admin interface. This could allow for unauthorized command execution, potentially impacting systems and data. The risk to organizations with externally facing Pulse Secure devices is considerable, requiring prompt attention.

4Halo Surface Signal

OS Command Injection

Ivanti Connect Secure

8.18.28.3

External exposure likelihood

Halo Surface Signal score for CVE-2019-11539

The affected product, Pulse Connect Secure, is a remote access VPN gateway. These appliances are inherently designed to be deployed at the internet edge to provide external connectivity, making their management and web interfaces commonly reachable from the public internet.

Horizon Alert

Summary of the vulnerability and why it matters

The Pulse Connect Secure and Pulse Policy Secure products are affected by a vulnerability within their administrative web interface. This flaw allows an authenticated attacker to inject and execute commands on the affected systems. The potential impact includes unauthorized access to and manipulation of sensitive data and systems.

  • Vulnerable admin web interface
  • Command injection weakness
  • Compromised systems and data

Attack Path

How an attacker could exploit the issue

An attacker can exploit a vulnerability in the Pulse Secure administrative web interface to gain control of the system. This attack requires the attacker to first gain authenticated access to the administrative interface. Once authenticated, the attacker can inject and execute commands, leading to the compromise of the system and potential unauthorized access to sensitive data.

  • Requires authenticated access.
  • Attacker injects commands.
  • Attacker gains system control.

Live Threat

Current exploitation, exposure, and threat context

The identified vulnerability allows an authenticated attacker with administrative access to an organization's Pulse Secure system to inject and execute commands. This could lead to significant compromise of the affected systems and data, posing a substantial business risk. The attack vector suggests that organizations with externally facing Pulse Secure devices are at a higher risk.

  • Likely attacker skill level: Advanced.
  • Required access or conditions: Authenticated administrative access.
  • Business risk or urgency: High.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

An organization should take immediate action regarding this vulnerability, which allows an authenticated attacker to execute commands through the admin web interface. This could impact system integrity and data confidentiality. The risk is associated with external-facing remote access VPN appliances, which are often accessible from the internet.

  • Identify all affected assets.
  • Reduce exposure or isolate risk.
  • Apply vendor fixes and verify.
  • Monitor for related issues.

Frequently asked questions

What is Ivanti Pulse Connect Secure and its purpose?

Ivanti Pulse Connect Secure, also known as Pulse Connect Secure, is a virtual private network (VPN) gateway designed to provide secure remote access to corporate networks. It enables employees to connect to internal company resources from outside the office environment, ensuring data security during remote work.

What type of vulnerability does CVE-2019-11539 represent?

CVE-2019-11539 is classified as a command injection vulnerability (CWE-78). This weakness allows an authenticated attacker to inject and execute arbitrary commands on the targeted Pulse Connect Secure appliance, potentially leading to unauthorized system control and data compromise.

How can an attacker exploit the Pulse Connect Secure vulnerability?

An authenticated attacker can exploit this vulnerability by injecting commands through the administrative web interface of Pulse Connect Secure. This action can lead to the execution of unauthorized commands, granting the attacker control over the system.

What is the relevance of CVE-2019-11539, according to Halo Surface Signal?

Halo Surface Signal indicates that Pulse Connect Secure, a remote access VPN gateway, is often deployed at the internet edge, making its management interfaces potentially reachable from the public internet. This exposure increases the likelihood of exploitation for this vulnerability.

What steps should organizations take to address this command injection vulnerability?

Organizations should identify all affected Ivanti Pulse Connect Secure and Pulse Policy Secure assets, reduce external exposure if possible, and promptly apply vendor-provided updates. Verifying the successful application of patches and monitoring for any unusual activity are crucial steps to mitigate risk.

References