{"id":"CVE-2025-11232","state":"PUBLISHED","title":"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.\nThis issue affects Kea versions 3.0.1 through 3.0.1 and 3.1.1 through 3.1.2.","publishedAt":"2025-10-29T18:02:39.421Z","updatedAt":"2025-11-04T21:09:09.184Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"isc"},"assigner":"isc","products":["ISC Kea"],"affected":[{"vendor":"ISC","product":"Kea","defaultStatus":"unaffected","versions":[{"version":"3.0.1","status":"affected","lessThanOrEqual":"3.0.1","versionType":"custom"},{"version":"3.1.1","status":"affected","lessThanOrEqual":"3.1.2","versionType":"custom"},{"version":"2.6.0","status":"unaffected","lessThanOrEqual":"2.6.4","versionType":"custom"},{"version":"2.7.0","status":"unaffected","lessThanOrEqual":"2.7.9","versionType":"custom"},{"version":"3.0.0","status":"unaffected","lessThanOrEqual":"3.0.0","versionType":"custom"},{"version":"3.1.0","status":"unaffected","lessThanOrEqual":"3.1.0","versionType":"custom"}]}],"references":["https://kb.isc.org/docs/cve-2025-11232","http://www.openwall.com/lists/oss-security/2025/10/29/5"],"weaknesses":["CWE-823"],"ingestedAt":"2026-10-29T20:08:31.050Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/11xxx/CVE-2025-11232.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-11232","state":"PUBLISHED","datePublished":"2025-10-29T18:02:39.421Z","dateUpdated":"2025-11-04T21:09:09.184Z","assignerShortName":"isc","assignerOrgId":"404fd4d2-a609-4245-b543-2c944a302a22","dateReserved":"2025-10-01T15:15:46.992Z"},"containers":{"cna":{"title":"Invalid characters cause assert","descriptions":[{"lang":"en","value":"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.\nThis issue affects Kea versions 3.0.1 through 3.0.1 and 3.1.1 through 3.1.2."}],"affected":[{"vendor":"ISC","product":"Kea","defaultStatus":"unaffected","versions":[{"version":"3.0.1","status":"affected","lessThanOrEqual":"3.0.1","versionType":"custom"},{"version":"3.1.1","status":"affected","lessThanOrEqual":"3.1.2","versionType":"custom"},{"version":"2.6.0","status":"unaffected","lessThanOrEqual":"2.6.4","versionType":"custom"},{"version":"2.7.0","status":"unaffected","lessThanOrEqual":"2.7.9","versionType":"custom"},{"version":"3.0.0","status":"unaffected","lessThanOrEqual":"3.0.0","versionType":"custom"},{"version":"3.1.0","status":"unaffected","lessThanOrEqual":"3.1.0","versionType":"custom"}]}],"references":[{"url":"https://kb.isc.org/docs/cve-2025-11232","name":"CVE-2025-11232","tags":["vendor-advisory"]}],"metrics":[{"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-823","lang":"en","type":"CWE","description":"CWE-823 Use of Out-of-range Pointer Offset"}]}],"providerMetadata":{"shortName":"isc","orgId":"404fd4d2-a609-4245-b543-2c944a302a22","dateUpdated":"2025-10-29T18:02:39.421Z"},"datePublic":"2025-10-29T00:00:00.000Z","impacts":[{"descriptions":[{"lang":"en","value":"A denial of service from the repeated attacks against the Kea server"}]}],"workarounds":[{"lang":"en","value":"Setting \"hostname-char-replacement\" to anything other than an empty value (suggestion: \"x\") is an effective workaround to this issue, regardless of other settings."}],"exploits":[{"lang":"en","value":"We are not aware of any active exploits."}],"solutions":[{"lang":"en","value":"Upgrade to the patched release most closely related to your current version of Kea: 3.0.2 or 3.1.3."}],"credits":[{"lang":"en","value":"ISC would like to thank Siniša Uskoković and Ralf Steuer from Vienna University of Economics and Business for bringing this vulnerability to our attention."}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-10-29T18:22:07.119804Z","id":"CVE-2025-11232","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-29T18:22:23.455Z"}},{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2025/10/29/5"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-04T21:09:09.184Z"}}]}}}