External risk intelligence

Cisco SD-WAN Elevated Privilege Vulnerability.

CVE advisoryKnown Exploit

CVE-2022-20775

A vulnerability in Cisco SD-WAN software's command-line interface allows an authenticated local attacker to gain elevated privileges. This could allow an attacker to execute arbitrary commands as the root user, potentially compromising the entire SD-WAN infrastructure. Organizations using affected Cisco SD-WAN software

1Halo Surface Signal

Path Traversal

Cisco Catalyst Sd Wan Manager

before 20.6.320.7 to before 20.7.220.8

External exposure likelihood

Halo Surface Signal score for CVE-2022-20775

This vulnerability is limited to the command-line interface (CLI) of the Cisco SD-WAN software and requires an authenticated, local attacker to execute commands. Because it necessitates local access to the device's management interface rather than being exposed to the public internet, the attack surface is considered internal and local-only.

Horizon Alert

Summary of the vulnerability and why it matters

The Cisco SD-WAN software command-line interface (CLI) contains a vulnerability related to improper access controls. This flaw can allow an authenticated local attacker to execute arbitrary commands with root user privileges. The main business impact is the potential for unauthorized system control and data compromise.

  • Vulnerable: Cisco SD-WAN software CLI
  • Weakness: Improper command access controls
  • Impact: Unauthorized system control

Attack Path

How an attacker could exploit the issue

An authenticated, local attacker can exploit this vulnerability to gain elevated privileges. This occurs due to improper access controls on commands within the application's command-line interface. The attacker can then execute arbitrary commands as the root user, impacting system integrity and data confidentiality.

  • Requires authenticated local access.
  • Attacker runs a crafted command.
  • Results in elevated privileges and command execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability allows an authenticated local attacker to gain elevated privileges on Cisco SD-WAN software by running a crafted command. Successful exploitation could enable the attacker to execute arbitrary commands as the root user, posing a significant risk to the affected systems and the business. The issue stems from improper access controls within the application's command-line interface.

  • Likely attacker skill level: Moderate
  • Required access or conditions: Authenticated local access
  • Business risk or urgency: High

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

An organization that utilizes Cisco SD-WAN software should take immediate action to address a vulnerability that could allow an authenticated, local attacker to gain elevated privileges. This vulnerability stems from improper access controls within the command-line interface, potentially enabling an attacker to execute arbitrary commands as the root user. Cisco has released software updates to resolve this issue, and no workarounds are available.

  • Identify all Cisco SD-WAN assets.
  • Reduce exposure by isolating affected systems.
  • Apply vendor fixes and validate changes.
  • Monitor for related security incidents.

Frequently asked questions

What is the primary function of Cisco SD-WAN software in network management?

Cisco SD-WAN software, including components like the vBond Orchestrator, vSmart Controller, and vEdge devices, provides centralized control and management for software-defined wide area networks. It enables intelligent path control, application-aware routing, and simplified network deployment and management, optimizing application performance and user experience.

What vulnerability class applies to CVE-2022-20775, and what is its nature?

CVE-2022-20775 is associated with CWE-25 (Improper Access Control) and CWE-282 ( Improper Authorization). It's a vulnerability in the Cisco SD-WAN software's command-line interface (CLI) that could allow an authenticated, local attacker to gain elevated privileges. This is due to flawed access controls on specific commands within the CLI.

How can an attacker exploit the Cisco SD-WAN vulnerability and what is the scope of impact?

An authenticated, local attacker can exploit this vulnerability by executing a specially crafted command on the Cisco SD-WAN application's CLI. A successful exploit allows the attacker to run arbitrary commands with root user privileges. The scope is limited to the local system where the CLI is accessed, as it requires authenticated local access.

What is the relevance of the Cisco SD-WAN vulnerability concerning internal systems?

This Cisco SD-WAN vulnerability is classified as 'internal' because it requires an authenticated, local attacker to exploit. The vulnerability lies within the command-line interface (CLI) and necessitates direct access to the device's management interface, rather than being exposed to the public internet. This limits the attack surface to systems already within the network perimeter with legitimate access.

What are the recommended steps to address the Cisco SD-WAN privilege escalation vulnerability?

Cisco has released software updates that resolve this vulnerability. Organizations should apply these updates promptly. There are no workarounds available to mitigate this specific issue, making patching the primary and necessary response to secure the SD-WAN environment.

References

Cyber Threat Intelligence (CTI)

Sources: threatActor