CVE-2020-14310

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{"affected": [{"affectedData": [{"product": "grub2", "vendor": "The Grub2 Project", "versions": [{"status": "affected", "version": "2.06"}]}], "source": "secalert@redhat.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:*", "matchCriteriaId": "01F8D62F-70BB-4718-A095-D68540C17EEA", "versionEndExcluding": "2.06", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "142AD0DD-4CF3-4D74-9442-459CE3347E3A", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:*", "matchCriteriaId": "92BC9265-6959-4D37-BE5E-8C45E98992F8", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:*", "matchCriteriaId": "831F0F47-3565-4763-B16F-C87B1FF2035E", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:*", "matchCriteriaId": "6897676D-53F9-45B3-B27F-7FF9A4C58D33", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:*", "matchCriteriaId": "B09ACF2D-D83F-4A86-8185-9569605D8EE1", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*", "matchCriteriaId": "B620311B-34A3-48A6-82DF-6F078D7A4493", "vulnerable": true}, {"criteria": "cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*", "matchCriteriaId": "B009C22E-30A4-4288-BCF6-C3E81DEAF45A", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*", "matchCriteriaId": "815D70A8-47D3-459C-A32C-9FEACA0659D1", "vulnerable": true}, {"criteria": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*", "matchCriteriaId": "7A5301BF-1402-4BE0-A0F8-69FBE79BC6D6", "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:20.04:*:*:*:lts:*:*:*", "matchCriteriaId": "902B8056-9E37-443B-8905-8AA93E2447FB", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer allocation to read the value from the font value. An attacker may leverage that by crafting a malicious font file which has a name with UINT32_MAX, leading to read_section_as_string() to an arithmetic overflow, zero-sized allocation and further heap-based buffer overflow."}, {"lang": "es", "value": "Se presenta un problema en grub2 versiones anteriores a 2.06, en la funci\u00f3n read_section_as_string(). Se espera que el nombre de la fuente sea una longitud m\u00e1xima UINT32_MAX - 1 en bytes, pero no lo verifica antes de proceder con la asignaci\u00f3n del b\u00fafer para leer el valor desde el valor de la fuente. Un atacante puede aprovechar esto mediante el dise\u00f1o de un archivo de fuente malicioso que tenga un nombre con UINT32_MAX, conduciendo a la funci\u00f3n read_section_as_string () a un desbordamiento aritm\u00e9tico, asignaci\u00f3n de tama\u00f1o cero y un nuevo desbordamiento de b\u00fafer en la regi\u00f3n heap de la memoria"}], "id": "CVE-2020-14310", "lastModified": "2026-06-17T02:54:30.740", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 3.6, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:L/AC:L/Au:N/C:N/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 0.5, "impactScore": 5.2, "source": "secalert@redhat.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 0.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-07-31T22:15:11.500", "references": [{"source": "secalert@redhat.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html"}, {"source": "secalert@redhat.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14310"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202104-05"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4432-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14310"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202104-05"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4432-1/"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-122"}, {"lang": "en", "value": "CWE-190"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-190"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank Chris Coulson (Ubuntu Security Team) for reporting this issue.", "affected_release": [{"advisory": "RHSA-2020:3217", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "fwupdate-0:12-6.el7_8", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-07-29T00:00:00Z"}, {"advisory": "RHSA-2020:3217", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "grub2-1:2.02-0.86.el7_8", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-07-29T00:00:00Z"}, {"advisory": "RHSA-2020:3217", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "shim-0:15-7.el7_9", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-07-29T00:00:00Z"}, {"advisory": "RHSA-2020:3217", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "shim-signed-0:15-7.el7_8", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-07-29T00:00:00Z"}, {"advisory": "RHSA-2020:3273", "cpe": "cpe:/o:redhat:rhel_aus:7.2", 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"shim-signed-0:15-8.el7_6", "product_name": "Red Hat Enterprise Linux 7.6 Extended Update Support", "release_date": "2020-08-03T00:00:00Z"}, {"advisory": "RHSA-2020:3274", "cpe": "cpe:/o:redhat:rhel_eus:7.7", "package": "fwupdate-0:12-6.el7_7", "product_name": "Red Hat Enterprise Linux 7.7 Extended Update Support", "release_date": "2020-08-03T00:00:00Z"}, {"advisory": "RHSA-2020:3274", "cpe": "cpe:/o:redhat:rhel_eus:7.7", "package": "grub2-1:2.02-0.86.el7_7", "product_name": "Red Hat Enterprise Linux 7.7 Extended Update Support", "release_date": "2020-08-03T00:00:00Z"}, {"advisory": "RHSA-2020:3274", "cpe": "cpe:/o:redhat:rhel_eus:7.7", "package": "shim-0:15-8.el7", "product_name": "Red Hat Enterprise Linux 7.7 Extended Update Support", "release_date": "2020-08-03T00:00:00Z"}, {"advisory": "RHSA-2020:3274", "cpe": "cpe:/o:redhat:rhel_eus:7.7", "package": "shim-signed-0:15-8.el7_7", "product_name": "Red Hat Enterprise Linux 7.7 Extended Update Support", "release_date": "2020-08-03T00:00:00Z"}, {"advisory": "RHSA-2020:3216", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "fwupd-0:1.1.4-7.el8_2", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-07-29T00:00:00Z"}, {"advisory": "RHSA-2020:3216", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "grub2-1:2.02-87.el8_2", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-07-29T00:00:00Z"}, {"advisory": "RHSA-2020:3216", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "shim-0:15-14.el8_2", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-07-29T00:00:00Z"}, {"advisory": "RHSA-2020:3216", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "shim-unsigned-x64-0:15-7.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-07-29T00:00:00Z"}, {"advisory": "RHSA-2020:3227", "cpe": "cpe:/o:redhat:rhel_e4s:8.0", "package": "fwupd-0:1.1.4-2.el8_0", "product_name": "Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions", "release_date": "2020-07-29T00:00:00Z"}, {"advisory": "RHSA-2020:3227", "cpe": "cpe:/o:redhat:rhel_e4s:8.0", "package": "grub2-1:2.02-87.el8_0", "product_name": "Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions", "release_date": "2020-07-29T00:00:00Z"}, {"advisory": "RHSA-2020:3227", "cpe": "cpe:/o:redhat:rhel_e4s:8.0", "package": "shim-0:15-14.el8_0", "product_name": "Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions", "release_date": "2020-07-29T00:00:00Z"}, {"advisory": "RHSA-2020:3223", "cpe": "cpe:/o:redhat:rhel_eus:8.1", "package": "fwupd-0:1.1.4-2.el8_1", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2020-07-29T00:00:00Z"}, {"advisory": "RHSA-2020:3223", "cpe": "cpe:/o:redhat:rhel_eus:8.1", "package": "grub2-1:2.02-87.el8_1", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2020-07-29T00:00:00Z"}, {"advisory": "RHSA-2020:3223", "cpe": "cpe:/o:redhat:rhel_eus:8.1", "package": "shim-0:15-14.el8_1", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2020-07-29T00:00:00Z"}, {"advisory": "RHSA-2020:3223", "cpe": "cpe:/o:redhat:rhel_eus:8.1", "package": "shim-unsigned-x64-0:15-7.el8", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2020-07-29T00:00:00Z"}], "bugzilla": {"description": "grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow", "id": "1852030", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1852030"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H", "status": "verified"}, "cwe": "CWE-190->CWE-122", "details": ["There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer allocation to read the value from the font value. An attacker may leverage that by crafting a malicious font file which has a name with UINT32_MAX, leading to read_section_as_string() to an arithmetic overflow, zero-sized allocation and further heap-based buffer overflow.", "A flaw was found in grub2. An expected font value is not verified before proceeding with buffer allocations allowing an attacker to use a malicious font file to create an arithmetic overflow, zero-sized allocation, and further heap-based buffer overflow. The highest threat from this vulnerability is to data integrity and system availability."], "name": "CVE-2020-14310", "public_date": "2020-07-29T17:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-14310\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-14310"], "threat_severity": "Moderate"}

{}