CVE-2022-2601

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A malicious crafted pf2 font can lead to an overflow when calculating the max_glyph_size value, allocating a smaller than needed buffer for the glyph, this further leads to a buffer overflow and a heap based out-of-bounds write. An attacker may use this vulnerability to circumvent the secure boot mechanism."}, {"lang": "es", "value": "Se encontr\u00f3 un desbordamiento del b\u00fafer en grub_font_construct_glyph(). Una fuente pf2 manipulada maliciosamente puede provocar un desbordamiento al calcular el valor max_glyph_size, asignando un b\u00fafer m\u00e1s peque\u00f1o de lo necesario para el glifo, lo que adem\u00e1s provoca un desbordamiento del b\u00fafer y una escritura fuera de los l\u00edmites basada en el heap. Un atacante puede utilizar esta vulnerabilidad para eludir el mecanismo de arranque seguro."}], "id": "CVE-2022-2601", "lastModified": "2026-06-17T04:42:11.660", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 6.0, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 6.0, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-2601", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-05-20T15:43:38.484246Z", "version": "2.0.3"}}]}, "published": "2022-12-14T21:15:10.190", "references": [{"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2112975#c0"}, {"source": "secalert@redhat.com", "url": "https://security.gentoo.org/glsa/202311-14"}, {"source": "secalert@redhat.com", "url": "https://security.netapp.com/advisory/ntap-20230203-0004/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://arstechnica.com/security/2024/08/a-patch-microsoft-spent-2-years-preparing-is-making-a-mess-for-some-linux-users/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2112975#c0"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.gentoo.org/glsa/202311-14"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20230203-0004/"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-122"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-122"}, {"lang": "en", "value": "CWE-787"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Zhang Boyang for reporting this issue.", "affected_release": [{"advisory": "RHSA-2024:2002", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "grub2-1:2.02-0.87.el7_9.14", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2024-04-23T00:00:00Z"}, {"advisory": "RHSA-2023:0049", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "grub2-1:2.02-142.el8_7.1", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2023-01-09T00:00:00Z"}, {"advisory": "RHSA-2022:8494", "cpe": "cpe:/o:redhat:rhel_e4s:8.1", "package": "grub2-1:2.02-87.el8_1.11", "product_name": "Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions", "release_date": "2022-11-16T00:00:00Z"}, {"advisory": "RHSA-2022:8800", "cpe": "cpe:/o:redhat:rhel_aus:8.2", "package": "grub2-1:2.02-87.el8_2.11", "product_name": "Red Hat Enterprise Linux 8.2 Advanced Update Support", "release_date": "2022-12-06T00:00:00Z"}, {"advisory": "RHSA-2022:8800", "cpe": "cpe:/o:redhat:rhel_tus:8.2", "package": "grub2-1:2.02-87.el8_2.11", "product_name": "Red Hat Enterprise Linux 8.2 Telecommunications Update Service", "release_date": "2022-12-06T00:00:00Z"}, {"advisory": "RHSA-2022:8800", "cpe": "cpe:/o:redhat:rhel_e4s:8.2", "package": "grub2-1:2.02-87.el8_2.11", "product_name": "Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions", "release_date": "2022-12-06T00:00:00Z"}, {"advisory": "RHSA-2023:0047", "cpe": "cpe:/o:redhat:rhel_eus:8.4", "package": "grub2-1:2.02-99.el8_4.10", "product_name": "Red Hat Enterprise Linux 8.4 Extended Update Support", "release_date": "2023-01-09T00:00:00Z"}, {"advisory": "RHSA-2023:0048", "cpe": "cpe:/o:redhat:rhel_eus:8.6", "package": "grub2-1:2.02-123.el8_6.12", "product_name": "Red Hat Enterprise Linux 8.6 Extended Update Support", "release_date": "2023-01-09T00:00:00Z"}, {"advisory": "RHSA-2023:0752", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "grub2-1:2.06-46.el9_1.3", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-02-14T00:00:00Z"}, {"advisory": "RHSA-2022:8978", "cpe": "cpe:/o:redhat:rhel_eus:9.0", "package": "grub2-1:2.06-27.el9_0.12", "product_name": "Red Hat Enterprise Linux 9.0 Extended Update Support", "release_date": "2022-12-13T00:00:00Z"}], "bugzilla": {"description": "grub2: Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass", "id": "2112975", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2112975"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.2", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-122->CWE-787", "details": ["A buffer overflow was found in grub_font_construct_glyph(). A malicious crafted pf2 font can lead to an overflow when calculating the max_glyph_size value, allocating a smaller than needed buffer for the glyph, this further leads to a buffer overflow and a heap based out-of-bounds write. An attacker may use this vulnerability to circumvent the secure boot mechanism.", "A flaw was found where a maliciously crafted pf2 font could lead to an out-of-bounds write in grub2. A successful attack can lead to memory corruption and secure boot circumvention."], "name": "CVE-2022-2601", "public_date": "2022-11-15T10:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-2601\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-2601\nhttps://lists.gnu.org/archive/html/grub-devel/2022-11/msg00059.html"], "statement": "Grub code needs to be updated after installing the relevant RPM.\nFor RHEL systems installed on machines with EFI based BIOS : sudo grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg\nFor RHEL systems installed on machines with legacy (msdos) based BIOS : sudo grub2-mkconfig -o /boot/grub2/grub.cfg\nFor BIOS based systems, after completing yum update, grub2-install needs to be run against the device where the boot partition is, for example, grub2-install /dev/vda.", "threat_severity": "Moderate"}

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