{"containers": {"cna": {"affected": [{"product": "curl", "vendor": "The Curl Project", "versions": [{"status": "affected", "version": "from 7.59.0 to 7.61.1"}]}], "datePublic": "2018-10-31T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an 'easy' handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct."}], "metrics": [{"cvssV3_0": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N", "version": "3.0"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-416", "description": "CWE-416", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2019-03-11T09:57:01.000Z", "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat"}, "references": [{"name": "GLSA-201903-03", "tags": ["vendor-advisory", "x_refsource_GENTOO"], "url": "https://security.gentoo.org/glsa/201903-03"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f"}, {"name": "1042013", "tags": ["vdb-entry", "x_refsource_SECTRACK"], "url": "http://www.securitytracker.com/id/1042013"}, {"tags": ["x_refsource_MISC"], "url": "https://curl.haxx.se/docs/CVE-2018-16840.html"}, {"name": "USN-3805-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU"], "url": "https://usn.ubuntu.com/3805-1/"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "secalert@redhat.com", "ID": "CVE-2018-16840", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "curl", "version": {"version_data": [{"version_value": "from 7.59.0 to 7.61.1"}]}}]}, "vendor_name": "The Curl Project"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an 'easy' handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct."}]}, "impact": {"cvss": [[{"vectorString": "4.3/CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N", "version": "3.0"}]]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-416"}]}]}, "references": {"reference_data": [{"name": "GLSA-201903-03", "refsource": "GENTOO", "url": "https://security.gentoo.org/glsa/201903-03"}, {"name": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840", "refsource": "CONFIRM", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840"}, {"name": "https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f", "refsource": "CONFIRM", "url": "https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f"}, {"name": "1042013", "refsource": "SECTRACK", "url": "http://www.securitytracker.com/id/1042013"}, {"name": "https://curl.haxx.se/docs/CVE-2018-16840.html", "refsource": "MISC", "url": "https://curl.haxx.se/docs/CVE-2018-16840.html"}, {"name": "USN-3805-1", "refsource": "UBUNTU", "url": "https://usn.ubuntu.com/3805-1/"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T10:32:53.993Z"}, "title": "CVE Program Container", "references": [{"name": "GLSA-201903-03", "tags": ["vendor-advisory", "x_refsource_GENTOO", "x_transferred"], "url": "https://security.gentoo.org/glsa/201903-03"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f"}, {"name": "1042013", "tags": ["vdb-entry", "x_refsource_SECTRACK", "x_transferred"], "url": "http://www.securitytracker.com/id/1042013"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://curl.haxx.se/docs/CVE-2018-16840.html"}, {"name": "USN-3805-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU", "x_transferred"], "url": "https://usn.ubuntu.com/3805-1/"}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-16T14:08:48.093326Z", "id": "CVE-2018-16840", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-16T14:08:57.315Z"}}]}, "cveMetadata": {"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "assignerShortName": "redhat", "cveId": "CVE-2018-16840", "datePublished": "2018-10-31T18:00:00.000Z", "dateReserved": "2018-09-11T00:00:00.000Z", "dateUpdated": "2026-04-16T14:08:57.315Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.2"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://security.gentoo.org/glsa/201903-03", "name": "GLSA-201903-03", "tags": ["vendor-advisory", "x_refsource_GENTOO", "x_transferred"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840", "tags": ["x_refsource_CONFIRM", "x_transferred"]}, {"url": "https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f", "tags": ["x_refsource_CONFIRM", "x_transferred"]}, {"url": "http://www.securitytracker.com/id/1042013", "name": "1042013", "tags": ["vdb-entry", "x_refsource_SECTRACK", "x_transferred"]}, {"url": "https://curl.haxx.se/docs/CVE-2018-16840.html", "tags": ["x_refsource_MISC", "x_transferred"]}, {"url": "https://usn.ubuntu.com/3805-1/", "name": "USN-3805-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU", "x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T10:32:53.993Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2018-16840", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-16T14:08:48.093326Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-16T14:08:53.378Z"}}], "cna": {"metrics": [{"cvssV3_0": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "The Curl Project", "product": "curl", "versions": [{"status": "affected", "version": "from 7.59.0 to 7.61.1"}]}], "datePublic": "2018-10-31T00:00:00.000Z", "references": [{"url": "https://security.gentoo.org/glsa/201903-03", "name": "GLSA-201903-03", "tags": ["vendor-advisory", "x_refsource_GENTOO"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f", "tags": ["x_refsource_CONFIRM"]}, {"url": "http://www.securitytracker.com/id/1042013", "name": "1042013", "tags": ["vdb-entry", "x_refsource_SECTRACK"]}, {"url": "https://curl.haxx.se/docs/CVE-2018-16840.html", "tags": ["x_refsource_MISC"]}, {"url": "https://usn.ubuntu.com/3805-1/", "name": "USN-3805-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU"]}], "descriptions": [{"lang": "en", "value": "A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an 'easy' handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416"}]}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2019-03-11T09:57:01.000Z"}, "x_legacyV4Record": {"impact": {"cvss": [[{"version": "3.0", "vectorString": "4.3/CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N"}]]}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"version": {"version_data": [{"version_value": "from 7.59.0 to 7.61.1"}]}, "product_name": "curl"}]}, "vendor_name": "The Curl Project"}]}}, "data_type": "CVE", "references": {"reference_data": [{"url": "https://security.gentoo.org/glsa/201903-03", "name": "GLSA-201903-03", "refsource": "GENTOO"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840", "name": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840", "refsource": "CONFIRM"}, {"url": "https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f", "name": "https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f", "refsource": "CONFIRM"}, {"url": "http://www.securitytracker.com/id/1042013", "name": "1042013", "refsource": "SECTRACK"}, {"url": "https://curl.haxx.se/docs/CVE-2018-16840.html", "name": "https://curl.haxx.se/docs/CVE-2018-16840.html", "refsource": "MISC"}, {"url": "https://usn.ubuntu.com/3805-1/", "name": "USN-3805-1", "refsource": "UBUNTU"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "eng", "value": "A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an 'easy' handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-416"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2018-16840", "STATE": "PUBLIC", "ASSIGNER": "secalert@redhat.com"}}}}, "cveMetadata": {"cveId": "CVE-2018-16840", "state": "PUBLISHED", "dateUpdated": "2026-04-16T14:08:57.315Z", "dateReserved": "2018-09-11T00:00:00.000Z", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "datePublished": "2018-10-31T18:00:00.000Z", "assignerShortName": "redhat"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*", "matchCriteriaId": "BA39901D-8EE5-4B6F-A0D3-43522D998003", "versionEndExcluding": "7.62.0", "versionStartIncluding": "7.59.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*", "matchCriteriaId": "B5A6F2F3-4894-4392-8296-3B8DD2679084", "vulnerable": true}, {"criteria": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*", "matchCriteriaId": "F7016A2A-8365-4F1A-89A2-7A19F2BCAE5B", "vulnerable": true}, {"criteria": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*", "matchCriteriaId": "23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D", "vulnerable": true}, {"criteria": "cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*", "matchCriteriaId": "07C312A0-CD2C-4B9C-B064-6409B25C278F", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an 'easy' handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct."}, {"lang": "es", "value": "Se ha detectado un error de uso de memoria din\u00e1mica (heap) previamente liberada en Curl, desde la versi\u00f3n 7.59.0 hasta la 7.61.1, en el c\u00f3digo relacionado con el cierre de un controlador \"easy\". Al cerrar y limpiar un controlador \"easy\" en la funci\u00f3n \"Curl_close()\", el c\u00f3digo de la biblioteca libera, en primer lugar, un struct (sin pasar el puntero a null) y, despu\u00e9s, podr\u00eda escribir err\u00f3neamente en un campo struct dentro del struct ya liberado."}], "id": "CVE-2018-16840", "lastModified": "2025-04-17T13:05:04.557", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N", "version": "3.0"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "secalert@redhat.com", "type": "Secondary"}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2018-10-31T18:29:00.307", "references": [{"source": "secalert@redhat.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id/1042013"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840"}, {"source": "secalert@redhat.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://curl.haxx.se/docs/CVE-2018-16840.html"}, {"source": "secalert@redhat.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/201903-03"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/3805-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id/1042013"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://curl.haxx.se/docs/CVE-2018-16840.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/201903-03"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/3805-1/"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank the Curl project for reporting this issue. Upstream acknowledges Brian Carpenter (Geeknik Labs) as the original reporter.", "affected_release": [{"advisory": "RHSA-2019:1543", "cpe": "cpe:/a:redhat:jboss_core_services:1", "product_name": "JBoss Core Services Apache HTTP Server 2.4.29 SP2", "release_date": "2019-06-18T00:00:00Z"}], "bugzilla": {"description": "curl: Use-after-free when closing \"easy\" handle in Curl_close()", "id": "1642203", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1642203"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.0", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L", "status": "verified"}, "cwe": "CWE-416", "details": ["A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an 'easy' handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct."], "name": "CVE-2018-16840", "package_state": [{"cpe": "cpe:/a:redhat:rhel_dotnet:1.0", "fix_state": "Not affected", "package_name": "rh-dotnetcore10-curl", "product_name": ".NET Core 1.0 on Red Hat Enterprise Linux"}, {"cpe": "cpe:/a:redhat:rhel_dotnet:1.1", "fix_state": "Not affected", "package_name": "rh-dotnetcore11-curl", "product_name": ".NET Core 1.1 on Red Hat Enterprise Linux"}, {"cpe": "cpe:/a:redhat:rhel_dotnet:2.1", "fix_state": "Not affected", "package_name": "rh-dotnet21-curl", "product_name": ".NET Core 2.1 on Red Hat Enterprise Linux"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:jboss_core_services:1", "fix_state": "Affected", "package_name": "curl", "product_name": "Red Hat JBoss Core Services"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5", "fix_state": "Not affected", "package_name": "curl", "product_name": "Red Hat JBoss Web Server 5"}, {"cpe": "cpe:/a:redhat:rhel_software_collections:3", "fix_state": "Fix deferred", "package_name": "httpd24-curl", "product_name": "Red Hat Software Collections"}], "public_date": "2018-10-31T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2018-16840\nhttps://nvd.nist.gov/vuln/detail/CVE-2018-16840\nhttps://curl.haxx.se/docs/CVE-2018-16840.html"], "threat_severity": "Low"}

{}