Three vulnerabilities have been discovered in the Command-Line Interface (CLI) of Cisco TelePresence Collaboration Endpoint (CE) software and RoomOS. These vulnerabilities allow an authenticated, local attacker to overwrite arbitrary files on an affected device's local file system.
Description
The vulnerabilities exist due to improper access controls on files that reside on the local file system. To exploit these vulnerabilities, an attacker would need to have a remote support user account. Once in possession of this account, the attacker could craft a specific symbolic link, or symlink, to overwrite arbitrary files on the local file system of an affected device. This could potentially lead to unauthorized access or further exploitation of the device.
It is important to note that CVE-2023-20092 does not affect the Cisco DX70, DX80, TelePresence MX Series, or TelePresence SX Series devices.
Exploit Details
An example exploit involves placing a symlink in a specific location on the local file system of an affected device. The attacker would first need to access the CLI and use their remote support user account to create the symlink.
Here's a sample code snippet demonstrating the use of a symlink
ln -s /target/file /path/to/symlink
In this case, /target/file would be the file the attacker wants to overwrite, and /path/to/symlink is the location where the symlink is created.
Original References
Cisco has provided the following advisories, which contain detailed information about the vulnerabilities and affected products:
- Cisco TelePresence CE and RoomOS Arbitrary File Overwrite Vulnerability
- Cisco TelePresence CE Software and RoomOS Software Privilege Escalation Vulnerabilities
Mitigation and Workarounds
Cisco has released software updates that address these vulnerabilities. It is highly recommended that organizations install these updates to protect their devices from potential attacks. There are no workarounds that address these vulnerabilities.
To determine if your device is affected and apply the appropriate patches, follow the instructions provided in the Cisco advisories linked above. Ensure that proper access controls and least privilege principles are applied to user accounts, thereby reducing the risk of unauthorized access or exploitation.
Conclusion
Organizations using Cisco TelePresence CE and RoomOS should be aware of these vulnerabilities and take the necessary steps to patch their devices to mitigate potential attacks. Ensuring the security of your devices, as well as having vigilant and knowledgeable users, is crucial in protecting your organization from a wide array of cyber threats.
Timeline
Published on: 11/15/2024 16:15:26 UTC
Last modified on: 11/18/2024 17:11:56 UTC