CVE-2024-39894

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}, {"affectedData": [{"cpes": ["cpe:2.3:a:openbsd:openssh:9.5:-:*:*:*:*:*:*"], "defaultStatus": "unknown", "product": "openssh", "vendor": "openbsd", "versions": [{"lessThanOrEqual": "9.7", "status": "affected", "version": "9.5", "versionType": "custom"}]}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "OpenSSH 9.5 through 9.7 before 9.8 sometimes allows timing attacks against echo-off password entry (e.g., for su and Sudo) because of an ObscureKeystrokeTiming logic error. Similarly, other timing attacks against keystroke entry could occur."}, {"lang": "es", "value": "OpenSSH 9.5 a 9.7 anterior a 9.8 a veces permite ataques de sincronizaci\u00f3n contra la entrada de contrase\u00f1a sin eco (por ejemplo, para su y Sudo) debido a un error l\u00f3gico de ObscureKeystrokeTiming. De manera similar, podr\u00edan ocurrir otros ataques de sincronizaci\u00f3n contra la entrada de teclas."}], "id": "CVE-2024-39894", "lastModified": "2026-06-17T07:42:58.770", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-39894", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2024-07-03T13:15:38.073610Z", "version": "2.0.3"}}]}, "published": "2024-07-02T18:15:03.710", "references": [{"source": "cve@mitre.org", "url": "http://www.openwall.com/lists/oss-security/2024/07/03/6"}, {"source": "cve@mitre.org", "url": "http://www.openwall.com/lists/oss-security/2024/07/23/4"}, {"source": "cve@mitre.org", "url": "http://www.openwall.com/lists/oss-security/2024/07/23/6"}, {"source": "cve@mitre.org", "url": "http://www.openwall.com/lists/oss-security/2024/07/28/3"}, {"source": "cve@mitre.org", "url": "https://crzphil.github.io/posts/ssh-obfuscation-bypass/"}, {"source": "cve@mitre.org", "url": "https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html"}, {"source": "cve@mitre.org", "url": "https://news.ycombinator.com/item?id=41508530"}, {"source": "cve@mitre.org", "url": "https://security.netapp.com/advisory/ntap-20240712-0004/"}, {"source": "cve@mitre.org", "url": "https://www.openssh.com/txt/release-9.8"}, {"source": "cve@mitre.org", "url": "https://www.openwall.com/lists/oss-security/2024/07/02/1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://seclists.org/fulldisclosure/2024/Sep/33"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2024/07/03/6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2024/07/23/4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2024/07/23/6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2024/07/28/3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20240712-0004/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-25:01.openssh.asc"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.openssh.com/txt/release-9.8"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.openwall.com/lists/oss-security/2024/07/02/1"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-367"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "openssh: Logic error in ObscureKeystrokeTiming", "id": "2295273", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2295273"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-203", "details": ["OpenSSH 9.5 through 9.7 before 9.8 sometimes allows timing attacks against echo-off password entry (e.g., for su and Sudo) because of an ObscureKeystrokeTiming logic error. Similarly, other timing attacks against keystroke entry could occur.", "A flaw was found in OpenSSH. A logic error in the SSH ObscureKeystrokeTiming feature (on by default) rendered this feature ineffective. A passive observer could still detect which network packets contained real keystrokes when the countermeasure was active because fake and real keystroke packets were being sent unconditionally."], "name": "CVE-2024-39894", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2024-07-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-39894\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-39894\nhttps://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html\nhttps://www.openssh.com/txt/release-9.8\nhttps://www.openwall.com/lists/oss-security/2024/07/02/1"], "threat_severity": "Low"}

{"created": "2025-07-12T22:31:08.097783+00:00", "updated": "2025-07-12T22:31:08.097934+00:00", "vendors": ["openssh", "openssh$PRODUCT$openssh"]}