Dzmitry Lukyanenka, an esteemed member of the AXIS OS Bug Bounty Program, recently discovered a vulnerability within the VAPIX API param.cgi of Axis devices that, it exploited, could allow an attacker to block access to the web interface for users. Fortunately, this vulnerability is restricted to param.cgi and does not affect other API endpoints or services.

In this long-read, we'll go over the vulnerability, its impact, and how to patch it with the help of Axis's security advisory.

Vulnerability overview

Common Vulnerability and Exposure (CVE) ID: 2024-47262
Severity: Medium
Affected Component: VAPIX API param.cgi in Axis devices
Exploit: Race condition attack
Effect: Blocked access to the web interface of the Axis device for users
Scope: Limited to param.cgi; other API endpoints and services remain unaffected

The Vulnerability

Dzmitry discovered that the VAPIX API param.cgi in Axis devices had a race condition vulnerability, which, if exploited, would enable the attacker to block access to the device's web interface for users. Here is a code snippet illustrating the vulnerability:

/* Axis VAPIX API Race Condition Vulnerability Example */
get_param()
{
   /* The attacker can exploit the race condition vulnerability to block access */
}

The vulnerability is specifically found within param.cgi, so other API endpoints and services that don't rely on param.cgi aren't impacted.

Exploit details

The exploit leverages the race condition vulnerability by sending multiple, simultaneous or near-simultaneous requests to the param.cgi in the TARGETED_AXIS_DEVICE, effectively blocking access to the web interface for users.

Here is a code snippet demonstrating the exploit for this vulnerability

/* Axis VAPIX API Race Condition Exploit Example */
race_condition_exploit()
{
   send_multiple_requests("TARGETED_AXIS_DEVICEparam.cgi");
}

Solution and additional information

Axis has released patches for the vulnerable AXIS OS versions. Please refer to the official Axis security advisory for more details on the updated versions and how to apply the patch:

- Axis Security Advisory: CVE-2024-47262

It is highly recommended to update your AXIS OS to the latest patched version as detailed in the security advisory to thwart any potential exploits of the CVE-2024-47262 vulnerability. Axis is committed to maintaining a high level of security for their devices and the AXIS OS Bug Bounty Program aims to continuously improve the platform by rewarding diligent researchers like Dzmitry Lukyanenka.

In conclusion, while the CVE-2024-47262 vulnerability could cause a significant disruption to the users of affected Axis devices, the dedicated work of the AXIS OS team and Bug Bounty participants like Dzmitry Lukyanenka ensures that these devices don't fall prey to malicious attacks. By staying informed on the latest vulnerabilities and promptly applying provided patches, users can continue to enjoy the benefits of Axis devices with minimal risk.

Timeline

Published on: 03/04/2025 06:15:29 UTC
Last modified on: 03/28/2025 07:11:08 UTC