CVE: CVE-2025-32803
Title: Insecure file permissions can result in confidential information leakage
Document version: 2.0
Posting date: 28 May 2025
Program impacted: Kea
Versions affected:
Kea
- 2.4.0 -> 2.4.1
- 2.6.0 -> 2.6.2
- 2.7.0 -> 2.7.8
(Versions prior to 2.4.0 were not assessed.)
End-of-life versions are likely also affected but have not been tested.
Severity: Medium
Exploitable: Locally
Description:
In some cases, Kea log files or lease files may be world-readable.
Impact:
If an attacker has access to a local unprivileged user account, they would be able to read the logs and/or lease information. This might disclose details about DHCP clients (MAC addresses, hostnames, IP addresses, configuration details, and so on), or about Kea itself.
CVSS Score: 4.0
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
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:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N&version=3.1.
Workarounds:
It is possible to work around this problem by ensuring that the directories that contain the logs and lease files are only accessible to trusted users.
Active exploits:
We are not aware of any active exploits.
Solution:
Upgrade to the patched release most closely related to your current version of Kea:
- 2.4.2
- 2.6.3
- 2.7.9
Acknowledgments:
ISC would like to thank Matthias Gerstner from the SUSE security team for bringing this vulnerability to our attention.
Document revision history:
- 1.0 Early Notification, 21 May 2025
- 1.1 Changed CVSS Score from 7.3 to 4.0 (I:L/A:H to I:N/A:N), 22 May 2025
- 2.0 Public disclosure, 28 May 2025
Do you still have questions? Questions regarding this advisory should be mailed to kea-security@isc.org or posted as confidential GitLab issues at https://gitlab.isc.org/isc-projects/kea/-/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-2025-32803 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.