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{"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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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 in grub_squash_read_symlink may lead to heap-based buffer overflow", "id": "1852022", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1852022"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-190->CWE-122", "details": ["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.", "A flaw was found in grub2. 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. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability."], "name": "CVE-2020-14309", "public_date": "2020-07-29T17:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-14309\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-14309"], "threat_severity": "Moderate", "upstream_fix": "grub 2.06"}