{"api_version":"1","generated_at":"2026-07-23T21:16:34+00:00","cve":"CVE-2021-31870","urls":{"html":"https://cve.report/CVE-2021-31870","api":"https://cve.report/api/cve/CVE-2021-31870.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-31870","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-31870"},"summary":{"title":"CVE-2021-31870","description":"An issue was discovered in klibc before 2.0.9. Multiplication in the calloc() function may result in an integer overflow and a subsequent heap buffer overflow.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2021-04-30 06:15:00","updated_at":"2022-04-19 03:51:00"},"problem_types":["CWE-190"],"metrics":[],"references":[{"url":"http://www.openwall.com/lists/oss-security/2021/04/30/1","name":"[oss-security] 20210430 [ANNOUNCE] klibc 2.0.9","refsource":"MLIST","tags":[],"title":"oss-security - [ANNOUNCE] klibc 2.0.9","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=292650f04c2b5348b4efbad61fb014ed09b4f3f2","name":"https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=292650f04c2b5348b4efbad61fb014ed09b4f3f2","refsource":"MISC","tags":[],"title":"klibc/klibc.git - klibc main development tree","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://kernel.org/pub/linux/libs/klibc/2.0/","name":"https://kernel.org/pub/linux/libs/klibc/2.0/","refsource":"MISC","tags":[],"title":"Index of /pub/linux/libs/klibc/2.0","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.zytor.com/archives/klibc/2021-April/004593.html","name":"https://lists.zytor.com/archives/klibc/2021-April/004593.html","refsource":"MISC","tags":[],"title":"[klibc] [ANNOUNCE] klibc 2.0.9","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.debian.org/debian-lts-announce/2021/06/msg00025.html","name":"[debian-lts-announce] 20210628 [SECURITY] [DLA 2695-1] klibc security update","refsource":"MLIST","tags":[],"title":"[SECURITY] [DLA 2695-1] klibc security update","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-31870","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31870","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"31870","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"9.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"31870","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"klibc_project","cpe5":"klibc","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2021-31870","qid":"178687","title":"Debian Security Update for klibc (DLA 2695-1)"},{"cve":"CVE-2021-31870","qid":"180087","title":"Debian Security Update for klibc (CVE-2021-31870)"},{"cve":"CVE-2021-31870","qid":"198744","title":"Ubuntu Security Notification for klibc Vulnerabilities (USN-5379-1)"},{"cve":"CVE-2021-31870","qid":"506105","title":"Alpine Linux Security Update for klibc"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2021-31870","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"An issue was discovered in klibc before 2.0.9. Multiplication in the calloc() function may result in an integer overflow and a subsequent heap buffer overflow."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"https://kernel.org/pub/linux/libs/klibc/2.0/","refsource":"MISC","name":"https://kernel.org/pub/linux/libs/klibc/2.0/"},{"url":"https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=292650f04c2b5348b4efbad61fb014ed09b4f3f2","refsource":"MISC","name":"https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=292650f04c2b5348b4efbad61fb014ed09b4f3f2"},{"url":"https://lists.zytor.com/archives/klibc/2021-April/004593.html","refsource":"MISC","name":"https://lists.zytor.com/archives/klibc/2021-April/004593.html"},{"refsource":"MLIST","name":"[oss-security] 20210430 [ANNOUNCE] klibc 2.0.9","url":"http://www.openwall.com/lists/oss-security/2021/04/30/1"},{"refsource":"MLIST","name":"[debian-lts-announce] 20210628 [SECURITY] [DLA 2695-1] klibc security update","url":"https://lists.debian.org/debian-lts-announce/2021/06/msg00025.html"}]}},"nvd":{"publishedDate":"2021-04-30 06:15:00","lastModifiedDate":"2022-04-19 03:51:00","problem_types":["CWE-190"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL"},"exploitabilityScore":3.9,"impactScore":5.9},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL","baseScore":7.5},"severity":"HIGH","exploitabilityScore":10,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:klibc_project:klibc:*:*:*:*:*:*:*:*","versionEndExcluding":"2.0.9","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"31870","Ordinal":"207187","Title":"CVE-2021-31870","CVE":"CVE-2021-31870","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"31870","Ordinal":"1","NoteData":"An issue was discovered in klibc before 2.0.9. Multiplication in the calloc() function may result in an integer overflow and a subsequent heap buffer overflow.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"31870","Ordinal":"2","NoteData":"2021-04-30","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"31870","Ordinal":"3","NoteData":"2021-06-28","Type":"Other","Title":"Modified"}]}}}