CVE-2024-28872: Incorrect TLS certificate validation can lead to escalated privileges

CVE: CVE-2024-28872

Title: Incorrect TLS certificate validation can lead to escalated privileges

Document version: 1.0

Posting date: 27 March 2024

Program impacted: Stork

Versions affected:

Stork

• 0.15.0 -> 1.15.0

Severity: High

Exploitable: Remotely

Description:

The TLS certificate validation code is flawed. An attacker can obtain a TLS certificate from the Stork server and use it to connect to the Stork agent. Once this connection is established with the valid certificate, the attacker can send malicious commands to a monitored service (Kea or BIND 9), possibly resulting in confidential data loss and/or denial of service. It should be noted that this vulnerability is not related to BIND 9 or Kea directly, and only customers using the Stork management tool are potentially affected.

Impact:

The possible impacts are denial of service, loss of confidential information, and integrity loss. If successful, the attacker can cause the Stork agent to shut down; the attacker can also obtain confidential data from Kea or BIND 9, cause those services to terminate, or modify their configurations.

CVSS Score: 8.9

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

For more information on the Common Vulnerability Scoring System and to obtain your specific environmental score please visit: https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:H&version=3.1.

Workarounds:

It should be possible to decrease the attack vector by protecting the Stork server and Stork agents with a firewall or similar mechanism.

Active exploits:

We are not aware of any active exploits.

Solution:

Upgrade to the patched release most closely related to your current version of Stork:

• 1.15.1

Document revision history:

• 1.0 Public disclosure, 27 March 2024

Do you still have questions? Questions regarding this advisory should be mailed to stork-security@isc.org or posted as confidential GitLab issues at https://gitlab.isc.org/isc-projects/stork/-/issues/new?issue[confidential]=true.

Note:

ISC patches only currently supported versions. When possible we indicate EOL versions affected. For current information on which versions are actively supported, please see https://www.isc.org/download/.

ISC Security Vulnerability Disclosure Policy:

Details of our current security advisory policy and practice can be found in the ISC Software Defect and Security Vulnerability Disclosure Policy at https://kb.isc.org/docs/aa-00861.

The Knowledgebase article https://kb.isc.org/docs/cve-2024-28872 is the complete and official security advisory document.

Legal Disclaimer:

Internet Systems Consortium (ISC) is providing this notice on an "AS IS" basis. No warranty or guarantee of any kind is expressed in this notice and none should be implied. ISC expressly excludes and disclaims any warranties regarding this notice or materials referred to in this notice, including, without limitation, any implied warranty of merchantability, fitness for a particular purpose, absence of hidden defects, or of non-infringement. Your use or reliance on this notice or materials referred to in this notice is at your own risk. ISC may change this notice at any time. A stand-alone copy or paraphrase of the text of this document that omits the document URL is an uncontrolled copy. Uncontrolled copies may lack important information, be out of date, or contain factual errors.