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CVE-2019-9494 (GCVE-0-2019-9494)

Vulnerability from cvelistv5 – Published: 2019-04-17 13:31 – Updated: 2024-08-04 21:54
VLAI
Title
The implementations of SAE in hostapd and wpa_supplicant are vulnerable to side-channel attacks
Summary
The implementations of SAE in hostapd and wpa_supplicant are vulnerable to side channel attacks as a result of observable timing differences and cache access patterns. An attacker may be able to gain leaked information from a side channel attack that can be used for full password recovery. Both hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.7 are affected.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
  • CWE-208 - Information Exposure Through Timing Discrepancy
  • CWE-524 - Information Exposure Through Caching
Assigner
References
Impacted products
Vendor Product Version CPE status
Wi-Fi Alliance hostapd with SAE support Affected: 2.7 , ≤ 2.7 (custom)
guessed Create a notification for this product.
Wi-Fi Alliance wpa_supplicant with SAE support Affected: 2.7 , ≤ 2.7 (custom)
guessed Create a notification for this product.
Show details on NVD website
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      "published": "2019-04-17T14:29:03.840",
      "references": "[{\"url\": \"http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00021.html\", \"source\": \"cret@cert.org\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"http://packetstormsecurity.com/files/152914/FreeBSD-Security-Advisory-FreeBSD-SA-19-03.wpa.html\", \"source\": \"cret@cert.org\", \"tags\": [\"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/56OBBOJJSKRTDGEXZOVFSTP4HDSDBLAE/\", \"source\": \"cret@cert.org\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVMJOFEYBGXZLFF5IOLW67SSOPKFEJP3/\", \"source\": \"cret@cert.org\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TDOZGR3T7FVO5JSZWK2QPR7AOFIEJTIZ/\", \"source\": \"cret@cert.org\"}, {\"url\": \"https://seclists.org/bugtraq/2019/May/40\", \"source\": \"cret@cert.org\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"https://security.FreeBSD.org/advisories/FreeBSD-SA-19:03.wpa.asc\", \"source\": \"cret@cert.org\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://w1.fi/security/2019-1/\", \"source\": \"cret@cert.org\", \"tags\": [\"Patch\", \"Vendor Advisory\"]}, {\"url\": \"https://www.synology.com/security/advisory/Synology_SA_19_16\", \"source\": \"cret@cert.org\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00021.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"http://packetstormsecurity.com/files/152914/FreeBSD-Security-Advisory-FreeBSD-SA-19-03.wpa.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/56OBBOJJSKRTDGEXZOVFSTP4HDSDBLAE/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVMJOFEYBGXZLFF5IOLW67SSOPKFEJP3/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TDOZGR3T7FVO5JSZWK2QPR7AOFIEJTIZ/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://seclists.org/bugtraq/2019/May/40\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"https://security.FreeBSD.org/advisories/FreeBSD-SA-19:03.wpa.asc\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://w1.fi/security/2019-1/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\", \"Vendor Advisory\"]}, {\"url\": \"https://www.synology.com/security/advisory/Synology_SA_19_16\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\"]}]",
      "sourceIdentifier": "cret@cert.org",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"cret@cert.org\", \"type\": \"Secondary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-208\"}, {\"lang\": \"en\", \"value\": \"CWE-524\"}]}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-203\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2019-9494\",\"sourceIdentifier\":\"cret@cert.org\",\"published\":\"2019-04-17T14:29:03.840\",\"lastModified\":\"2024-11-21T04:51:43.657\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The implementations of SAE in hostapd and wpa_supplicant are vulnerable to side channel attacks as a result of observable timing differences and cache access patterns. An attacker may be able to gain leaked information from a side channel attack that can be used for full password recovery. Both hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.7 are affected.\"},{\"lang\":\"es\",\"value\":\"Las implementaciones SAE en hostapd y wpa_supplicant son vulnerables a los ataques de canal lateral (side channel) como resultado de diferencias de tiempo observables y patrones de acceso a la cach\u00e9. Un atacante puede conseguir informaci\u00f3n filtrada de un ataque de canal lateral (side channel) que pueda ser usado  para la recuperaci\u00f3n completa de la contrase\u00f1a. Tanto hostapd con soporte SAE como wpa_supplicant con soporte SAE antes e incluyendo la versi\u00f3n 2.7 est\u00e1n afectados.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N\",\"baseScore\":5.9,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.2,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:M/Au:N/C:P/I:N/A:N\",\"baseScore\":4.3,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.6,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"cret@cert.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-208\"},{\"lang\":\"en\",\"value\":\"CWE-524\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-203\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:w1.fi:hostapd:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"2.7\",\"matchCriteriaId\":\"5133129D-DA6B-485D-9FE7-33C994FBAF05\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:w1.fi:wpa_supplicant:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"2.7\",\"matchCriteriaId\":\"46294B0E-0043-487D-AD8F-931DC05F0E78\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"DC1BD7B7-6D88-42B8-878E-F1318CA5FCAF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"D100F7CE-FC64-4CC6-852A-6136D72DA419\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"97A4B8DF-58DA-4AB6-A1F9-331B36409BA3\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:opensuse:backports_sle:15.0:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"D83DA865-E4A6-4FBF-AA1B-A969EBA6B2AD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:opensuse:backports_sle:15.0:sp1:*:*:*:*:*:*\",\"matchCriteriaId\":\"40513095-7E6E-46B3-B604-C926F1BA3568\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B620311B-34A3-48A6-82DF-6F078D7A4493\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:synology:radius_server:3.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"2C6E6871-7BB3-43BB-9A31-0B44B46C8D97\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:synology:router_manager:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.2.3-8087\",\"matchCriteriaId\":\"041AF55B-1899-4C8D-8236-215027609F79\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:freebsd:freebsd:11.2:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"3ACD1D8D-B3BC-4E99-B846-90A4071DB87B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:freebsd:freebsd:11.2:p2:*:*:*:*:*:*\",\"matchCriteriaId\":\"699FE432-8DF0-49F1-A98B-0E19CE01E5CE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:freebsd:freebsd:11.2:p3:*:*:*:*:*:*\",\"matchCriteriaId\":\"20B06752-39EE-4600-AC1F-69FB9C88E2A8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:freebsd:freebsd:11.2:p4:*:*:*:*:*:*\",\"matchCriteriaId\":\"22365F7C-2B00-4B61-84E8-EFBA3B8CFDC0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:freebsd:freebsd:11.2:p5:*:*:*:*:*:*\",\"matchCriteriaId\":\"E86CD544-86C4-4D9D-9CE5-087027509EDA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:freebsd:freebsd:11.2:p6:*:*:*:*:*:*\",\"matchCriteriaId\":\"64E47AE7-BB45-428E-90E9-38BFDFF23650\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:freebsd:freebsd:11.2:p7:*:*:*:*:*:*\",\"matchCriteriaId\":\"586B9FA3-65A2-41EB-A848-E4A75565F0CA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:freebsd:freebsd:11.2:p8:*:*:*:*:*:*\",\"matchCriteriaId\":\"1164B48E-2F28-43C5-9B7B-546EAE12E27D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:freebsd:freebsd:11.2:p9:*:*:*:*:*:*\",\"matchCriteriaId\":\"F0B15B89-3AD2-4E03-9F47-DA934702187B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:freebsd:freebsd:11.2:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"878DF67E-420A-4229-BEA8-DB9F7161ED9A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:freebsd:freebsd:12.0:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"826B53C2-517F-4FC6-92E8-E7FCB24F91B4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:freebsd:freebsd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Advisory\"]},{\"url\":\"https://w1.fi/security/2019-1/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://www.synology.com/security/advisory/Synology_SA_19_16\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T13:37:32+00:00",
      "cve": "CVE-2019-9494",
      "id": "CVE-2019-9494",
      "initial_release_date": "2019-04-10T00:00:00+00:00",
      "product_status:known_not_affected": "11",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "wpa_supplicant: SAE Timing-based and Cache-based side-channel attack against WPA3\u0027s Dragonfly handshake",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2019/cve-2019-9494.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-01T01:49:48Z",
      "cve": "CVE-2019-9494",
      "id": "CVE-2019-9494",
      "initial_release_date": "2023-02-15T04:14:40Z",
      "product_status:known_affected": "9",
      "product_status:known_not_affected": "13",
      "product_status:recommended": "97",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2019-9494",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2019-9494.json",
      "version": "26"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.