CVE-2024-26135: meshcentral — Exploit & Fix

Description

MeshCentral is a full computer management web site. Versions prior to 1.1.21 a cross-site websocket hijacking (CSWSH) vulnerability within the control.ashx endpoint. This component is the primary mechanism used within MeshCentral to perform administrative actions on the server. The vulnerability is exploitable when an attacker is able to convince a victim end-user to click on a malicious link to a page hosting an attacker-controlled site. The attacker can then originate a cross-site websocket connection using client-side JavaScript code to connect to `control.ashx` as the victim user within MeshCentral. Version 1.1.21 contains a patch for this issue.

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CVSS v3.1 Score

8.3

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

Weakness Type (CWE)

CWE-346 CWE-346

Affected Products

Vendor	Product	Versions
meshcentral	meshcentral	< 1.1.21

References

Advisories & Patches

https://github.com/Ylianst/MeshCentral/commit/f2e43cc6da9f5447dbff0948e6c6024c8a315af3 https://github.com/Ylianst/MeshCentral/security/advisories/GHSA-cp68-qrhr-g9h8 https://github.com/Ylianst/MeshCentral/commit/f2e43cc6da9f5447dbff0948e6c6024c8a315af3 https://github.com/Ylianst/MeshCentral/security/advisories/GHSA-cp68-qrhr-g9h8

Exploits

https://github.com/Ylianst/MeshCentral/security/advisories/GHSA-cp68-qrhr-g9h8 https://github.com/Ylianst/MeshCentral/security/advisories/GHSA-cp68-qrhr-g9h8

Frequently Asked Questions

What is CVE-2024-26135? +

MeshCentral is a full computer management web site. Versions prior to 1.1.21 a cross-site websocket hijacking (CSWSH) vulnerability within the control.ashx endpoint. This component is the primary mechanism used within MeshCentral to perform administrative actions on the server. The vulnerability is exploitable when an attacker is able to convince a victim end-user to click on a malicious link to a page hosting an attacker-controlled site. The attacker can then originate a cross-site websocket connection using client-side JavaScript code to connect to `control.ashx` as the victim user within MeshCentral. Version 1.1.21 contains a patch for this issue. It has a CVSS v3.1 base score of 8.3 (HIGH).

How severe is CVE-2024-26135? +

CVE-2024-26135 has a CVSS v3.1 score of 8.3 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-26135? +

CVE-2024-26135 affects products from meshcentral, specifically: meshcentral. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-26135? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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