CVE-2025-26465

{"id": "CVE-2025-26465", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "secalert@redhat.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.8, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 1.6}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.8, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 1.6}]}, "published": "2025-02-18T19:15:29.230", "references": [{"url": "https://access.redhat.com/errata/RHSA-2025:16823", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2025:3837", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2025:6993", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2025:8385", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/security/cve/CVE-2025-26465", "tags": ["Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/solutions/7109879", "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2344780", "tags": ["Issue Tracking", "Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://seclists.org/oss-sec/2025/q1/144", "tags": ["Mailing List", "Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "http://seclists.org/fulldisclosure/2025/Feb/18", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "http://seclists.org/fulldisclosure/2025/May/7", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "http://seclists.org/fulldisclosure/2025/May/8", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://blog.qualys.com/vulnerabilities-threat-research/2025/02/18/qualys-tru-discovers-two-vulnerabilities-in-openssh-cve-2025-26465-cve-2025-26466", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://bugzilla.suse.com/show_bug.cgi?id=1237040", "tags": ["Issue Tracking"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://ftp.openbsd.org/pub/OpenBSD/patches/7.6/common/008_ssh.patch.sig", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/02/msg00020.html", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.mindrot.org/pipermail/openssh-unix-announce/2025-February/000161.html", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://security-tracker.debian.org/tracker/CVE-2025-26465", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://security.netapp.com/advisory/ntap-20250228-0003/", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://ubuntu.com/security/CVE-2025-26465", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.openssh.com/releasenotes.html#9.9p2", "tags": ["Release Notes"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.openwall.com/lists/oss-security/2025/02/18/1", "tags": ["Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.openwall.com/lists/oss-security/2025/02/18/4", "tags": ["Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.theregister.com/2025/02/18/openssh_vulnerabilities_mitm_dos/", "tags": ["Press/Media Coverage"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.vicarius.io/vsociety/posts/cve-2025-26465-detect-vulnerable-openssh", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.vicarius.io/vsociety/posts/cve-2025-26465-mitigate-vulnerable-openssh", "tags": ["Mitigation", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://seclists.org/oss-sec/2025/q1/144", "tags": ["Mailing List", "Third Party Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-390"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high."}, {"lang": "es", "value": "Se encontr\u00f3 una vulnerabilidad en OpenSSH cuando la opci\u00f3n VerifyHostKeyDNS est\u00e1 habilitada. Un ataque de m\u00e1quina en el medio puede ser realizado mediante una m\u00e1quina maliciosa que se hace pasar por un servidor leg\u00edtimo. Este problema ocurre debido a c\u00f3mo los c\u00f3digos de error de OpenSSH Mishandles en condiciones espec\u00edficas al verificar la clave del host. Para que un ataque se considere exitoso, el atacante debe lograr agotar el recurso de memoria del cliente primero, lo que gira la complejidad del ataque."}], "lastModified": "2025-11-03T22:18:41.727", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AD9E4318-20E3-420F-8EF5-7C05C3386586", "versionEndIncluding": "9.8", "versionStartIncluding": "6.9"}, {"criteria": "cpe:2.3:a:openbsd:openssh:6.8:p1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "50836FA3-8116-4D58-B73E-B4830FB3A551"}, {"criteria": "cpe:2.3:a:openbsd:openssh:9.9:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E2B53BBB-6916-478C-A896-77C7F7E7D5DE"}, {"criteria": "cpe:2.3:a:openbsd:openssh:9.9:p1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F7A2B794-BA83-4A01-BD2E-541F18CB9E37"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*", "vulnerable": true, "matchCriteriaId": "3A756737-1CC4-42C2-A4DF-E1C893B4E2D5"}, {"criteria": "cpe:2.3:a:netapp:ontap:9:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A20333EE-4C13-426E-8B54-D78679D5DDB8"}, {"criteria": "cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "932D137F-528B-4526-9A89-CD59FA1AB0FE"}, {"criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED"}, {"criteria": "cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "46D69DCC-AE4D-4EA5-861C-D60951444C6C"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7F6FB57C-2BC7-487C-96DD-132683AEB35D"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}