{"id":"USN-4432-1","summary":"grub2, grub2-signed vulnerabilities","details":"Jesse Michael and Mickey Shkatov discovered that the configuration parser\nin GRUB2 did not properly exit when errors were discovered, resulting in\nheap-based buffer overflows. A local attacker could use this to execute\narbitrary code and bypass UEFI Secure Boot restrictions. (CVE-2020-10713)\n\nChris Coulson discovered that the GRUB2 function handling code did not\nproperly handle a function being redefined, leading to a use-after-free\nvulnerability. A local attacker could use this to execute arbitrary code\nand bypass UEFI Secure Boot restrictions. (CVE-2020-15706)\n\nChris Coulson discovered that multiple integer overflows existed in GRUB2\nwhen handling certain filesystems or font files, leading to heap-based\nbuffer overflows. A local attacker could use these to execute arbitrary\ncode and bypass UEFI Secure Boot restrictions. (CVE-2020-14309,\nCVE-2020-14310, CVE-2020-14311)\n\nIt was discovered that the memory allocator for GRUB2 did not validate\nallocation size, resulting in multiple integer overflows and heap-based\nbuffer overflows when handling certain filesystems, PNG images or disk\nmetadata. A local attacker could use this to execute arbitrary code and\nbypass UEFI Secure Boot restrictions. (CVE-2020-14308)\n\nMathieu Trudel-Lapierre discovered that in certain situations, GRUB2\nfailed to validate kernel signatures. A local attacker could use this\nto bypass Secure Boot restrictions. (CVE-2020-15705)\n\nColin Watson and Chris Coulson discovered that an integer overflow\nexisted in GRUB2 when handling the initrd command, leading to a heap-based\nbuffer overflow. A local attacker could use this to execute arbitrary code\nand bypass UEFI Secure Boot restrictions. (CVE-2020-15707)\n","modified":"2026-02-10T04:41:53Z","published":"2020-07-29T18:50:12Z","related":["UBUNTU-CVE-2020-10713","UBUNTU-CVE-2020-14308","UBUNTU-CVE-2020-14309","UBUNTU-CVE-2020-14310","UBUNTU-CVE-2020-14311","UBUNTU-CVE-2020-15705","UBUNTU-CVE-2020-15706","UBUNTU-CVE-2020-15707"],"upstream":["CVE-2020-10713","CVE-2020-14308","CVE-2020-14309","CVE-2020-14310","CVE-2020-14311","CVE-2020-15705","CVE-2020-15706","CVE-2020-15707","UBUNTU-CVE-2020-10713","UBUNTU-CVE-2020-14308","UBUNTU-CVE-2020-14309","UBUNTU-CVE-2020-14310","UBUNTU-CVE-2020-14311","UBUNTU-CVE-2020-15705","UBUNTU-CVE-2020-15706","UBUNTU-CVE-2020-15707"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4432-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-10713"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-14308"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-14309"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-14310"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-14311"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-15705"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-15706"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-15707"}],"affected":[{"package":{"name":"grub2","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/grub2@2.02~beta2-9ubuntu1.20?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.02~beta2-9ubuntu1.20"}]}],"versions":["2.00-19ubuntu2","2.00-19ubuntu3","2.00-19ubuntu4","2.00-20","2.00-21","2.00-22","2.02~beta2-5","2.02~beta2-6","2.02~beta2-7","2.02~beta2-8","2.02~beta2-9","2.02~beta2-9ubuntu1","2.02~beta2-9ubuntu1.1","2.02~beta2-9ubuntu1.2","2.02~beta2-9ubuntu1.3","2.02~beta2-9ubuntu1.4","2.02~beta2-9ubuntu1.5","2.02~beta2-9ubuntu1.6","2.02~beta2-9ubuntu1.7","2.02~beta2-9ubuntu1.8","2.02~beta2-9ubuntu1.11","2.02~beta2-9ubuntu1.12","2.02~beta2-9ubuntu1.14","2.02~beta2-9ubuntu1.15","2.02~beta2-9ubuntu1.16","2.02~beta2-9ubuntu1.17"],"ecosystem_specific":{"binaries":[{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-common"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-coreboot"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-coreboot-bin"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-efi"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-efi-amd64"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-efi-amd64-bin"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-efi-arm"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-efi-arm-bin"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-efi-arm64"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-efi-arm64-bin"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-efi-ia32"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-efi-ia32-bin"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-emu"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-firmware-qemu"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-ieee1275"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-ieee1275-bin"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-linuxbios"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-pc"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-pc-bin"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-rescue-pc"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-theme-starfield"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-uboot"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-uboot-bin"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-xen"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub-xen-bin"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub2"},{"binary_version":"2.02~beta2-9ubuntu1.20","binary_name":"grub2-common"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4432-1.json","cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2020-10713"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2020-14308"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2020-14309"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2020-14310"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2020-14311"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-15705"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2020-15706"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-15707"}],"ecosystem":"Ubuntu:Pro:14.04:LTS"}}},{"package":{"name":"grub2-signed","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/grub2-signed@1.34.22?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.34.22"}]}],"versions":["1.22","1.23","1.24","1.25","1.26","1.27","1.30","1.31","1.32","1.33","1.34","1.34.1","1.34.2","1.34.3","1.34.4","1.34.5","1.34.6","1.34.7","1.34.8","1.34.9","1.34.13","1.34.14","1.34.16","1.34.17","1.34.18","1.34.20"],"ecosystem_specific":{"binaries":[{"binary_version":"1.34.22+2.02~beta2-9ubuntu1.20","binary_name":"grub-efi-amd64-signed"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4432-1.json","cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2020-10713"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2020-14308"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2020-14309"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2020-14310"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2020-14311"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-15705"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2020-15706"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-15707"}],"ecosystem":"Ubuntu:Pro:14.04:LTS"}}},{"package":{"name":"grub2","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/grub2@2.02~beta2-36ubuntu3.26?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.02~beta2-36ubuntu3.26"}]}],"versions":["2.02~beta2-29","2.02~beta2-31","2.02~beta2-31ubuntu1","2.02~beta2-32","2.02~beta2-32ubuntu1","2.02~beta2-35","2.02~beta2-35ubuntu1","2.02~beta2-36","2.02~beta2-36ubuntu1","2.02~beta2-36ubuntu2","2.02~beta2-36ubuntu3","2.02~beta2-36ubuntu3.1","2.02~beta2-36ubuntu3.2","2.02~beta2-36ubuntu3.6","2.02~beta2-36ubuntu3.7","2.02~beta2-36ubuntu3.8","2.02~beta2-36ubuntu3.9","2.02~beta2-36ubuntu3.11","2.02~beta2-36ubuntu3.12","2.02~beta2-36ubuntu3.14","2.02~beta2-36ubuntu3.15","2.02~beta2-36ubuntu3.16","2.02~beta2-36ubuntu3.17","2.02~beta2-36ubuntu3.18","2.02~beta2-36ubuntu3.19","2.02~beta2-36ubuntu3.20","2.02~beta2-36ubuntu3.21","2.02~beta2-36ubuntu3.22","2.02~beta2-36ubuntu3.23"],"ecosystem_specific":{"binaries":[{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-common"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-coreboot"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-coreboot-bin"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-efi"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-efi-amd64"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-efi-amd64-bin"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-efi-arm"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-efi-arm-bin"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-efi-arm64"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-efi-arm64-bin"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-efi-ia32"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-efi-ia32-bin"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-emu"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-firmware-qemu"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-ieee1275"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-ieee1275-bin"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-linuxbios"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-pc"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-pc-bin"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-rescue-pc"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-theme-starfield"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-uboot"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-uboot-bin"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-xen"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-xen-bin"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub-xen-host"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name":"grub2"},{"binary_version":"2.02~beta2-36ubuntu3.26","binary_name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subscription 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