Máté Kukri discovered that the acpi command in GRUB 2 allowed privileged users to load crafted ACPI tables when secure boot is enabled. An attacker could use this to bypass UEFI Secure Boot restrictions. (CVE-2020-14372)
Chris Coulson discovered that the rmmod command in GRUB 2 contained a use- after-free vulnerability. A local attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. (CVE-2020-25632)
Chris Coulson discovered that a buffer overflow existed in the command line parser in GRUB 2. A local attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. (CVE-2020-27749)
It was discovered that the cutmem command in GRUB 2 did not honor secure boot locking. A local attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. (CVE-2020-27779)
It was discovered that the option parser in GRUB 2 contained a heap overflow vulnerability. A local attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. (CVE-2021-20225)
It was discovered that the menu rendering implementation in GRUB 2 did not properly calculate the amount of memory needed in some situations, leading to out-of-bounds writes. A local attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. (CVE-2021-20233)
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"id": "CVE-2020-27779",
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{
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{
"id": "CVE-2021-20233",
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"id": "CVE-2020-27749",
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{
"id": "CVE-2020-27779",
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{
"id": "CVE-2021-20225",
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"score": "medium"
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{
"id": "CVE-2021-20233",
"severity": [
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"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"
},
{
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"score": "medium"
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}
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"ecosystem": "Ubuntu:18.04:LTS"
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"type": "CVSS_V3",
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"score": "medium"
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{
"id": "CVE-2020-27779",
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"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H"
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"type": "CVSS_V3",
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{
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"score": "medium"
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{
"id": "CVE-2021-20233",
"severity": [
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"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"
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"score": "medium"
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"id": "CVE-2020-27749",
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{
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"score": "medium"
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]
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{
"id": "CVE-2021-20233",
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"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"
},
{
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"score": "medium"
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