CVE-2025-11232
Invalid characters cause assert
Description
To trigger the issue, three configuration parameters must have specific settings: "hostname-char-set" must be left at the default setting, which is "[^A-Za-z0-9.-]"; "hostname-char-replacement" must be empty (the default); and "ddns-qualifying-suffix" must *NOT* be empty (the default is empty). DDNS updates do not need to be enabled for this issue to manifest. A client that sends certain option content would then cause kea-dhcp4 to exit unexpectedly. This issue affects Kea versions 3.0.1 through 3.0.1 and 3.1.1 through 3.1.2.
INFO
Published Date :
Oct. 29, 2025, 6:15 p.m.
Last Modified :
Oct. 29, 2025, 6:15 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Kea to a patched version.
- Ensure 'hostname-char-set' is not the default.
- Ensure 'hostname-char-replacement' is not empty.
- Ensure 'ddns-qualifying-suffix' is empty.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-11232.
| URL | Resource |
|---|---|
| https://kb.isc.org/docs/cve-2025-11232 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-11232 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-11232
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-11232 vulnerability anywhere in the article.
-
Daily CyberSecurity
Jenkins Faces Wave of Plugin Flaws, Including SAML Authentication Bypass (CVE-2025-64131)
The Jenkins project has issued a major security advisory addressing a wave of vulnerabilities, including high-severity flaws that threaten the integrity and confidentiality of automation servers world ... Read more
-
Daily CyberSecurity
ISC Patches High-Severity Kea DHCPv4 DoS (CVE-2025-11232) Flaw, Allows Crash via Malformed Hostname
The Internet Systems Consortium (ISC) has issued a security advisory warning users of a denial-of-service (DoS) vulnerability in the Kea DHCPv4 server. Tracked as CVE-2025-11232 and rated CVSS 7.5 (Hi ... Read more
The following table lists the changes that have been made to the
CVE-2025-11232 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Oct. 29, 2025
Action Type Old Value New Value Added Description To trigger the issue, three configuration parameters must have specific settings: "hostname-char-set" must be left at the default setting, which is "[^A-Za-z0-9.-]"; "hostname-char-replacement" must be empty (the default); and "ddns-qualifying-suffix" must *NOT* be empty (the default is empty). DDNS updates do not need to be enabled for this issue to manifest. A client that sends certain option content would then cause kea-dhcp4 to exit unexpectedly. This issue affects Kea versions 3.0.1 through 3.0.1 and 3.1.1 through 3.1.2. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-823 Added Reference https://kb.isc.org/docs/cve-2025-11232