External risk intelligence

FatPipe Software File Upload Vulnerability.

CVE advisoryKnown Exploit

CVE-2021-27860

A vulnerability in FatPipe network devices allows an unauthenticated attacker to upload files to the filesystem. This could affect system integrity and data confidentiality, posing a business risk.

5Halo Surface Signal

Unrestricted File Upload

Fatpipeinc Ipvpn Firmware

5.2.06.1.27.1.29.1.210.1.210.2.2

External exposure likelihood

Halo Surface Signal score for CVE-2021-27860

The vulnerability affects web management interfaces of network appliances (WARP, IPVPN, MPVPN) that are designed to be deployed as internet-facing gateways. These devices serve as critical network infrastructure, and their management surfaces are commonly exposed to the internet by design to facilitate remote connectivity and configuration in standard deployment patterns.

Horizon Alert

Summary of the vulnerability and why it matters

A vulnerability exists in the web management interface of certain FatPipe network devices. This flaw allows an unauthorized remote attacker to upload files to any location on the device's filesystem. Such an action could compromise the integrity and confidentiality of the system and the data it manages.

  • Vulnerable web management interface
  • Unauthorized file upload capability
  • Compromised system data and integrity

Attack Path

How an attacker could exploit the issue

The vulnerability permits a remote attacker to upload a file to any location on the filesystem of an affected FatPipe device. This could be achieved by an unauthenticated attacker leveraging the web management interface. The uploaded file could then be executed, potentially leading to elevated privileges and further compromise of the organization's infrastructure. This attack path allows an attacker to gain a foothold within the network, which can then be used for subsequent malicious activities.

  • Attacker accesses web interface.
  • Attacker uploads a malicious file.
  • Malicious file gains control.

Live Threat

Current exploitation, exposure, and threat context

A vulnerability exists in the web management interface of FatPipe WARP, IPVPN, and MPVPN software. This vulnerability allows an attacker to upload a file to any location on the filesystem without requiring authentication. The potential impact includes the compromise of system integrity and confidentiality.

  • Likely attacker skill level: High
  • Required access or conditions: Network access
  • Business risk or urgency: High

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

A vulnerability in FatPipe WARP, IPVPN, and MPVPN software permits an unauthenticated attacker to upload arbitrary files. This could allow for the compromise of systems, data, and potentially business operations. Addressing this vulnerability involves identifying the affected devices, mitigating exposure, applying vendor-provided fixes, and verifying their implementation. Continuous monitoring for related malicious activity is also recommended to maintain a secure environment.

  • Locate all exposed devices.
  • Restrict network access.
  • Deploy vendor updates and confirm.
  • Watch for suspicious activity.

Frequently asked questions

What is the purpose of FatPipe WARP, IPVPN, and MPVPN software?

FatPipe WARP, IPVPN, and MPVPN are network appliance software solutions used for creating and managing secure virtual private networks (VPNs) and Wide Area Networks (WANs). They enable organizations to establish secure and efficient connections across multiple locations using the internet, facilitating remote access and site-to-site communication.

What type of vulnerability does CVE-2021-27860 represent?

CVE-2021-27860 is classified as CWE-434, "Unrestricted Upload of File with Dangerous Type." This weakness means the software allows the upload or transfer of dangerous file types that are processed within its environment, potentially leading to arbitrary file execution and system compromise.

How can attackers exploit the CVE-2021-27860 vulnerability?

An unauthenticated remote attacker can exploit this vulnerability by uploading a file to any location on the filesystem through the web management interface. This is achieved by sending a modified HTTP request to the affected device, potentially leading to system compromise.

What is the significance of CVE-2021-27860 for network security?

Halo classifies this CVE as 'Very likely' to be exploited due to its nature affecting internet-facing network appliance management interfaces. The vulnerability allows for file uploads, potentially leading to elevated privileges and further compromise of an organization's infrastructure.

What steps should be taken to address the FatPipe vulnerability?

Organizations should immediately apply vendor-provided updates, as FatPipe has released patches for affected versions. If immediate updates are not possible, disabling UI and SSH access from the WAN interface is recommended. Continuous monitoring for suspicious activity is also advised.

References