{"api_version":"1","generated_at":"2026-04-23T02:35:50+00:00","cve":"CVE-2020-14309","urls":{"html":"https://cve.report/CVE-2020-14309","api":"https://cve.report/api/cve/CVE-2020-14309.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-14309","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-14309"},"summary":{"title":"CVE-2020-14309","description":"There's an issue with grub2 in all versions before 2.06 when handling squashfs filesystems containing a symbolic link with name length of UINT32 bytes in size. The name size leads to an arithmetic overflow leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled data.","state":"PUBLIC","assigner":"secalert@redhat.com","published_at":"2020-07-30 13:15:00","updated_at":"2022-04-28 18:58:00"},"problem_types":["CWE-787","CWE-190"],"metrics":[],"references":[{"url":"https://security.netapp.com/advisory/ntap-20200731-0008/","name":"https://security.netapp.com/advisory/ntap-20200731-0008/","refsource":"CONFIRM","tags":["Third Party Advisory"],"title":"July 2020 Grub2 Vulnerabilities in NetApp Products | NetApp Product Security","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html","name":"openSUSE-SU-2020:1168","refsource":"SUSE","tags":[],"title":"[security-announce] openSUSE-SU-2020:1168-1: important: Security update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html","name":"openSUSE-SU-2020:1169","refsource":"SUSE","tags":[],"title":"[security-announce] openSUSE-SU-2020:1169-1: important: Security update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://security.gentoo.org/glsa/202104-05","name":"GLSA-202104-05","refsource":"GENTOO","tags":[],"title":"GRUB: Multiple vulnerabilities (GLSA 202104-05) — Gentoo security","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://usn.ubuntu.com/4432-1/","name":"USN-4432-1","refsource":"UBUNTU","tags":["Third Party Advisory"],"title":"USN-4432-1: GRUB 2 vulnerabilities | Ubuntu security notices | Ubuntu","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1852022","name":"https://bugzilla.redhat.com/show_bug.cgi?id=1852022","refsource":"MISC","tags":["Issue Tracking","Third Party Advisory"],"title":"1852022 – (CVE-2020-14309) CVE-2020-14309 grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-14309","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-14309","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2020","cve_id":"14309","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"gnu","cpe5":"grub2","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14309","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"gnu","cpe5":"grub2","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14309","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"opensuse","cpe5":"leap","cpe6":"15.1","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14309","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"opensuse","cpe5":"leap","cpe6":"15.2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2020-14309","qid":"377345","title":"Alibaba Cloud Linux Security Update for grub2 (ALINUX3-SA-2022:0064)"},{"cve":"CVE-2020-14309","qid":"377367","title":"Alibaba Cloud Linux Security Update for grub2 (ALINUX3-SA-2021:0026)"},{"cve":"CVE-2020-14309","qid":"377533","title":"Alibaba Cloud Linux Security Update for grub2 (ALINUX2-SA-2020:0108)"},{"cve":"CVE-2020-14309","qid":"502730","title":"Alpine Linux Security Update for grub"},{"cve":"CVE-2020-14309","qid":"710015","title":"Gentoo Linux GRUB Multiple Vulnerabilities (GLSA 202104-05)"},{"cve":"CVE-2020-14309","qid":"900056","title":"CBL-Mariner Linux Security Update for grub2 2.06~rc1"},{"cve":"CVE-2020-14309","qid":"901013","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for grub2 (6457-1)"},{"cve":"CVE-2020-14309","qid":"903689","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for grub2 (1823)"},{"cve":"CVE-2020-14309","qid":"906208","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for grub2 (1823-1)"},{"cve":"CVE-2020-14309","qid":"906381","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for grub2 (6457-2)"}]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ID":"CVE-2020-14309","ASSIGNER":"secalert@redhat.com","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"n/a","product":{"product_data":[{"product_name":"Grub","version":{"version_data":[{"version_value":"All grub2 versions before 2.06"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Integer Overflow or Wraparound leading to Heap-based Buffer Overflow"}]}]},"references":{"reference_data":[{"refsource":"MISC","name":"https://bugzilla.redhat.com/show_bug.cgi?id=1852022","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1852022"},{"refsource":"CONFIRM","name":"https://security.netapp.com/advisory/ntap-20200731-0008/","url":"https://security.netapp.com/advisory/ntap-20200731-0008/"},{"refsource":"UBUNTU","name":"USN-4432-1","url":"https://usn.ubuntu.com/4432-1/"},{"refsource":"SUSE","name":"openSUSE-SU-2020:1169","url":"http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html"},{"refsource":"SUSE","name":"openSUSE-SU-2020:1168","url":"http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html"},{"refsource":"GENTOO","name":"GLSA-202104-05","url":"https://security.gentoo.org/glsa/202104-05"}]},"description":{"description_data":[{"lang":"eng","value":"There's an issue with grub2 in all versions before 2.06 when handling squashfs filesystems containing a symbolic link with name length of UINT32 bytes in size. The name size leads to an arithmetic overflow leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled data."}]}},"nvd":{"publishedDate":"2020-07-30 13:15:00","lastModifiedDate":"2022-04-28 18:58:00","problem_types":["CWE-787","CWE-190"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":6.7,"baseSeverity":"MEDIUM"},"exploitabilityScore":0.8,"impactScore":5.9},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:L/AC:L/Au:N/C:P/I:P/A:P","accessVector":"LOCAL","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL","baseScore":4.6},"severity":"MEDIUM","exploitabilityScore":3.9,"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:gnu:grub2:*:*:*:*:*:*:*:*","versionEndExcluding":"2.06","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2020","CveId":"14309","Ordinal":"175539","Title":"CVE-2020-14309","CVE":"CVE-2020-14309","Year":"2020"},"notes":[{"CveYear":"2020","CveId":"14309","Ordinal":"1","NoteData":"There's an issue with grub2 in all versions before 2.06 when handling squashfs filesystems containing a symbolic link with name length of UINT32 bytes in size. The name size leads to an arithmetic overflow leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled data.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"14309","Ordinal":"2","NoteData":"2020-07-30","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"14309","Ordinal":"3","NoteData":"2021-04-30","Type":"Other","Title":"Modified"}]}}}