A newly discovered vulnerability (CVE-2022-40765) within the Edge Gateway component of Mitel MiVoice Connect versions up to 19.3 (22.22.610.) poses a significant risk to organizations utilizing this software. This vulnerability allows an authenticated attacker with internal network access to carry out a command-injection attack. The root cause of the issue is due to insufficient restriction of URL parameters within the system. In this post, we will delve into the details of this exploit, including code snippets, references to original sources, and crucial information for protecting your organization from this vulnerability.

Exploit Details

The CVE-2022-40765 vulnerability in the Edge Gateway component of Mitel MiVoice Connect allows an attacker to inject malicious commands into the system using specially crafted URL parameters. Once the attacker has access to internal network resources, they can execute these commands with the same privileges as the user running the affected software. This can lead to the compromise of sensitive data, disruption of system functionality, or even the complete takeover of the affected system.

The following is an example of a malicious URL targeting the vulnerable Edge Gateway component

https://example.com/gateway?next_action=os_command&command=attacker_controlled_payload

In this example, the attacker has crafted a URL containing two parameters: next_action and command. The next_action parameter is set to os_command, instructing the Edge Gateway component to execute the contents of the command parameter as an operating system command. The command parameter then contains the attacker's malicious payload, which will be executed on the targeted system.

1. CVE-2022-40765 - Detail: Official entry in the National Vulnerability Database.
2. Mitel Product Security Advisory 22-0001: Mitel's official advisory, which includes information about the affected versions, workaround, and patches.

Mitigation and Resolution

Mitel has released a security advisory (PSA-22-0001) addressing this vulnerability, and affected users are strongly encouraged to apply the patch provided in that advisory. If it is not possible to immediately apply the patch, the following workaround can be implemented until a patch can be installed:

- Restrict access to the Edge Gateway component from internal network resources by using network segmentation, firewalls, or other access control mechanisms.

- Audit existing user accounts and privileges to ensure that only necessary users have access to the affected component, and that they are assigned the least amount of privilege required to complete their tasks.

- Regularly review server logs for any suspicious activities that might indicate an attempted attack exploiting this vulnerability.

In addition to the mitigation steps mentioned above, organizations should establish a thorough patch management policy and be vigilant in keeping software up-to-date so as to minimize the risk posed by vulnerabilities such as CVE-2022-40765.

Conclusion

The CVE-2022-40765 vulnerability in the Edge Gateway component of Mitel MiVoice Connect poses a significant risk to organizations due to the potential for command injection attacks. By understanding the exploit details, applying the appropriate patches or workarounds, and following best practices in software and network security, organizations can better protect themselves from threats targeting this vulnerability and others. Stay informed about software updates, and always exercise caution when handling potential vulnerabilities within your organization's technology ecosystem.

Timeline

Published on: 11/22/2022 01:15:00 UTC
Last modified on: 11/26/2022 03:25:00 UTC