CVE-2018-15687

{"containers": {"cna": {"affected": [{"product": "systemd", "vendor": "systemd", "versions": [{"lessThanOrEqual": "239", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "credits": [{"lang": "en", "value": "Jann Horn"}], "datePublic": "2018-10-25T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "A race condition in chown_one() of systemd allows an attacker to cause systemd to set arbitrary permissions on arbitrary files. Affected releases are systemd versions up to and including 239."}], "metrics": [{"cvssV3_0": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.0"}}], "problemTypes": [{"descriptions": [{"description": "There is a race condition between a stat(2) call and the fchmodat(2) call.", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2018-11-13T10:57:01.000Z", "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "shortName": "canonical"}, "references": [{"name": "GLSA-201810-10", "tags": ["vendor-advisory", "x_refsource_GENTOO"], "url": "https://security.gentoo.org/glsa/201810-10"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/systemd/systemd/pull/10517/commits"}, {"name": "105748", "tags": ["vdb-entry", "x_refsource_BID"], "url": "http://www.securityfocus.com/bid/105748"}, {"name": "USN-3816-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU"], "url": "https://usn.ubuntu.com/3816-1/"}, {"name": "45715", "tags": ["exploit", "x_refsource_EXPLOIT-DB"], "url": "https://www.exploit-db.com/exploits/45715/"}], "source": {"defect": ["https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1796692"], "discovery": "EXTERNAL"}, "title": "systemd: chown_one() can dereference symlinks", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security@ubuntu.com", "DATE_PUBLIC": "2018-10-25T00:00:00.000Z", "ID": "CVE-2018-15687", "STATE": "PUBLIC", "TITLE": "systemd: chown_one() can dereference symlinks"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "systemd", "version": {"version_data": [{"affected": "<=", "version_affected": "<=", "version_value": "239"}]}}]}, "vendor_name": "systemd"}]}}, "credit": [{"lang": "eng", "value": "Jann Horn"}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A race condition in chown_one() of systemd allows an attacker to cause systemd to set arbitrary permissions on arbitrary files. Affected releases are systemd versions up to and including 239."}]}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.0"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "There is a race condition between a stat(2) call and the fchmodat(2) call."}]}]}, "references": {"reference_data": [{"name": "GLSA-201810-10", "refsource": "GENTOO", "url": "https://security.gentoo.org/glsa/201810-10"}, {"name": "https://github.com/systemd/systemd/pull/10517/commits", "refsource": "MISC", "url": "https://github.com/systemd/systemd/pull/10517/commits"}, {"name": "105748", "refsource": "BID", "url": "http://www.securityfocus.com/bid/105748"}, {"name": "USN-3816-1", "refsource": "UBUNTU", "url": "https://usn.ubuntu.com/3816-1/"}, {"name": "45715", "refsource": "EXPLOIT-DB", "url": "https://www.exploit-db.com/exploits/45715/"}]}, "source": {"defect": ["https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1796692"], "discovery": "EXTERNAL"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T10:01:54.407Z"}, "title": "CVE Program Container", "references": [{"name": "GLSA-201810-10", "tags": ["vendor-advisory", "x_refsource_GENTOO", "x_transferred"], "url": "https://security.gentoo.org/glsa/201810-10"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/systemd/systemd/pull/10517/commits"}, {"name": "105748", "tags": ["vdb-entry", "x_refsource_BID", "x_transferred"], "url": "http://www.securityfocus.com/bid/105748"}, {"name": "USN-3816-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU", "x_transferred"], "url": "https://usn.ubuntu.com/3816-1/"}, {"name": "45715", "tags": ["exploit", "x_refsource_EXPLOIT-DB", "x_transferred"], "url": "https://www.exploit-db.com/exploits/45715/"}]}, {"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-362", "lang": "en", "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-06-09T15:48:02.637217Z", "id": "CVE-2018-15687", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-06-09T15:48:38.953Z"}}]}, "cveMetadata": {"assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "assignerShortName": "canonical", "cveId": "CVE-2018-15687", "datePublished": "2018-10-26T14:00:00.000Z", "dateReserved": "2018-08-22T00:00:00.000Z", "dateUpdated": "2025-06-09T15:48:38.953Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://security.gentoo.org/glsa/201810-10", "name": "GLSA-201810-10", "tags": ["vendor-advisory", "x_refsource_GENTOO", "x_transferred"]}, {"url": "https://github.com/systemd/systemd/pull/10517/commits", "tags": ["x_refsource_MISC", "x_transferred"]}, {"url": "http://www.securityfocus.com/bid/105748", "name": "105748", "tags": ["vdb-entry", "x_refsource_BID", "x_transferred"]}, {"url": "https://usn.ubuntu.com/3816-1/", "name": "USN-3816-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU", "x_transferred"]}, {"url": "https://www.exploit-db.com/exploits/45715/", "name": "45715", "tags": ["exploit", "x_refsource_EXPLOIT-DB", "x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T10:01:54.407Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2018-15687", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2025-06-09T15:48:02.637217Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-362", "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-06-09T15:48:30.253Z"}}], "cna": {"title": "systemd: chown_one() can dereference symlinks", "source": {"defect": ["https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1796692"], "discovery": "EXTERNAL"}, "credits": [{"lang": "en", "value": "Jann Horn"}], "metrics": [{"cvssV3_0": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}], "affected": [{"vendor": "systemd", "product": "systemd", "versions": [{"status": "affected", "version": "unspecified", "versionType": "custom", "lessThanOrEqual": "239"}]}], "datePublic": "2018-10-25T00:00:00.000Z", "references": [{"url": "https://security.gentoo.org/glsa/201810-10", "name": "GLSA-201810-10", "tags": ["vendor-advisory", "x_refsource_GENTOO"]}, {"url": "https://github.com/systemd/systemd/pull/10517/commits", "tags": ["x_refsource_MISC"]}, {"url": "http://www.securityfocus.com/bid/105748", "name": "105748", "tags": ["vdb-entry", "x_refsource_BID"]}, {"url": "https://usn.ubuntu.com/3816-1/", "name": "USN-3816-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU"]}, {"url": "https://www.exploit-db.com/exploits/45715/", "name": "45715", "tags": ["exploit", "x_refsource_EXPLOIT-DB"]}], "descriptions": [{"lang": "en", "value": "A race condition in chown_one() of systemd allows an attacker to cause systemd to set arbitrary permissions on arbitrary files. Affected releases are systemd versions up to and including 239."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "text", "description": "There is a race condition between a stat(2) call and the fchmodat(2) call."}]}], "providerMetadata": {"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "shortName": "canonical", "dateUpdated": "2018-11-13T10:57:01.000Z"}, "x_legacyV4Record": {"credit": [{"lang": "eng", "value": "Jann Horn"}], "impact": {"cvss": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, "source": {"defect": ["https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1796692"], "discovery": "EXTERNAL"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"version": {"version_data": [{"affected": "<=", "version_value": "239", "version_affected": "<="}]}, "product_name": "systemd"}]}, "vendor_name": "systemd"}]}}, "data_type": "CVE", "references": {"reference_data": [{"url": "https://security.gentoo.org/glsa/201810-10", "name": "GLSA-201810-10", "refsource": "GENTOO"}, {"url": "https://github.com/systemd/systemd/pull/10517/commits", "name": "https://github.com/systemd/systemd/pull/10517/commits", "refsource": "MISC"}, {"url": "http://www.securityfocus.com/bid/105748", "name": "105748", "refsource": "BID"}, {"url": "https://usn.ubuntu.com/3816-1/", "name": "USN-3816-1", "refsource": "UBUNTU"}, {"url": "https://www.exploit-db.com/exploits/45715/", "name": "45715", "refsource": "EXPLOIT-DB"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "eng", "value": "A race condition in chown_one() of systemd allows an attacker to cause systemd to set arbitrary permissions on arbitrary files. Affected releases are systemd versions up to and including 239."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "There is a race condition between a stat(2) call and the fchmodat(2) call."}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2018-15687", "STATE": "PUBLIC", "TITLE": "systemd: chown_one() can dereference symlinks", "ASSIGNER": "security@ubuntu.com", "DATE_PUBLIC": "2018-10-25T00:00:00.000Z"}}}}, "cveMetadata": {"cveId": "CVE-2018-15687", "state": "PUBLISHED", "dateUpdated": "2025-06-09T15:48:38.953Z", "dateReserved": "2018-08-22T00:00:00.000Z", "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "datePublished": "2018-10-26T14:00:00.000Z", "assignerShortName": "canonical"}, "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"product": "systemd", "vendor": "systemd", "versions": [{"lessThanOrEqual": "239", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "source": "security@ubuntu.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"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"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*", "matchCriteriaId": "A2F20C41-576E-4A98-9BB9-26CB7709C2F1", "versionEndExcluding": "240", "versionStartIncluding": "235", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A race condition in chown_one() of systemd allows an attacker to cause systemd to set arbitrary permissions on arbitrary files. Affected releases are systemd versions up to and including 239."}, {"lang": "es", "value": "Una condici\u00f3n de carrera en chown_one() en systemd permite que un atacante provoque que systemd establezca permisos arbitrarios en archivos arbitrarios. Las versiones afectadas de systemd son todas hasta la 239 incluida."}], "id": "CVE-2018-15687", "lastModified": "2026-06-17T01:42:56.200", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 6.9, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 3.4, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "security@ubuntu.com", "type": "Secondary"}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2018-15687", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-06-09T15:48:02.637217Z", "version": "2.0.3"}}]}, "published": "2018-10-26T14:29:00.757", "references": [{"source": "security@ubuntu.com", "tags": ["Broken Link", "Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/105748"}, {"source": "security@ubuntu.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/systemd/systemd/pull/10517/commits"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/201810-10"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/3816-1/"}, {"source": "security@ubuntu.com", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "url": "https://www.exploit-db.com/exploits/45715/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Broken Link", "Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/105748"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/systemd/systemd/pull/10517/commits"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/201810-10"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/3816-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "url": "https://www.exploit-db.com/exploits/45715/"}], "sourceIdentifier": "security@ubuntu.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-362"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Jann Horn (Google Project Zero) and Ubuntu for reporting this issue.", "bugzilla": {"description": "systemd: Dereference of symlinks in chown_recursive.c:chown_one() allows for modification of file privileges", "id": "1639076", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1639076"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.3", "cvss3_scoring_vector": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-367->CWE-59", "details": ["A race condition in chown_one() of systemd allows an attacker to cause systemd to set arbitrary permissions on arbitrary files. Affected releases are systemd versions up to and including 239."], "name": "CVE-2018-15687", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "systemd", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "systemd", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:rhev_hypervisor:4", "fix_state": "Not affected", "package_name": "systemd", "product_name": "Red Hat Virtualization 4"}], "public_date": "2018-10-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2018-15687\nhttps://nvd.nist.gov/vuln/detail/CVE-2018-15687"], "statement": "This issue did not affect the versions of systemd as shipped with Red Hat Enterprise Linux 7 as the vulnerable code was introduced in a newer version of the package.", "threat_severity": "Moderate"}

{}