CVE-2020-16127

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["https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/1900255"], "discovery": "EXTERNAL"}, "title": "accountsservice .pam_environment infinite loop", "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security@ubuntu.com", "DATE_PUBLIC": "2020-11-03T00:00:00.000Z", "ID": "CVE-2020-16127", "STATE": "PUBLIC", "TITLE": "accountsservice .pam_environment infinite loop"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "accountsservice", "version": {"version_data": [{"version_affected": "<", "version_name": "0.6.35-0ubuntu7.3", "version_value": "0.6.35-0ubuntu7.3+esm2"}, {"version_affected": "<", "version_name": "0.6.40-2ubuntu11", "version_value": "0.6.40-2ubuntu11.6"}, {"version_affected": "<", "version_name": "0.6.45-1ubuntu1", "version_value": "0.6.45-1ubuntu1.3"}, {"version_affected": "<", "version_name": "0.6.55-0ubuntu", "version_value": "0.6.55-0ubuntu12~20.04.4"}, {"version_affected": "<", "version_name": "0.6.55-0ubuntu13", "version_value": "0.6.55-0ubuntu13.2"}]}}]}, "vendor_name": "Freedesktop"}]}}, "credit": [{"lang": "eng", "value": "Kevin Backhouse"}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "An Ubuntu-specific modification to AccountsService in versions before 0.6.55-0ubuntu13.2, among other earlier versions, would perform unbounded read operations on user-controlled ~/.pam_environment files, allowing an infinite loop if /dev/zero is symlinked to this location."}]}, "generator": {"engine": "Vulnogram 0.0.9"}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 2.8, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-20 Improper Input Validation"}]}]}, "references": {"reference_data": [{"name": "https://securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS", "refsource": "MISC", "url": "https://securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS"}]}, "source": {"advisory": "https://usn.ubuntu.com/usn/usn-4616-1", "defect": ["https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/1900255"], "discovery": "EXTERNAL"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T13:37:53.922Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS"}]}]}, "cveMetadata": {"assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "assignerShortName": "canonical", "cveId": "CVE-2020-16127", "datePublished": "2020-11-11T04:10:15.512Z", "dateReserved": "2020-07-29T00:00:00.000Z", "dateUpdated": "2024-09-16T17:58:49.219Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "accountsservice", "vendor": "Freedesktop", "versions": [{"lessThan": "0.6.35-0ubuntu7.3+esm2", "status": "affected", "version": "0.6.35-0ubuntu7.3", "versionType": "custom"}, {"lessThan": "0.6.40-2ubuntu11.6", "status": "affected", "version": "0.6.40-2ubuntu11", "versionType": "custom"}, {"lessThan": "0.6.45-1ubuntu1.3", "status": "affected", "version": "0.6.45-1ubuntu1", "versionType": "custom"}, {"lessThan": "0.6.55-0ubuntu12~20.04.4", "status": "affected", "version": "0.6.55-0ubuntu", "versionType": "custom"}, {"lessThan": "0.6.55-0ubuntu13.2", "status": "affected", "version": "0.6.55-0ubuntu13", "versionType": "custom"}]}], "source": "security@ubuntu.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:freedesktop:accountsservice:*:*:*:*:*:*:*:*", "matchCriteriaId": "9A297546-6EAD-40F9-819E-E3604CF93964", "versionEndExcluding": "0.6.55", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An Ubuntu-specific modification to AccountsService in versions before 0.6.55-0ubuntu13.2, among other earlier versions, would perform unbounded read operations on user-controlled ~/.pam_environment files, allowing an infinite loop if /dev/zero is symlinked to this location."}, {"lang": "es", "value": "Una modificaci\u00f3n espec\u00edfica de Ubuntu para AccountsService en versiones anteriores a 0.6.55-0ubuntu13.2, entre otras versiones anteriores, llevar\u00eda a cabo operaciones de lectura ilimitadas en archivos ~/.pam_environment controlados por el usuario, permitiendo un bucle infinito si /dev/zero est\u00e1 enlazado simb\u00f3licamente a esta ubicaci\u00f3n"}], "id": "CVE-2020-16127", "lastModified": "2026-06-17T02:57:45.447", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 2.1, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 2.8, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 1.3, "impactScore": 1.4, "source": "security@ubuntu.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-11-11T04:15:12.177", "references": [{"source": "security@ubuntu.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS"}], "sourceIdentifier": "security@ubuntu.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "security@ubuntu.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-835"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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