USN-4992-1

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Source

https://ubuntu.com/security/notices/USN-4992-1

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4992-1.json

JSON Data

https://api.osv.dev/v1/vulns/USN-4992-1

Related

Published

2021-06-18T03:57:46.226980Z

Modified

2021-06-18T03:57:46.226980Z

Summary

grub2-signed, grub2-unsigned vulnerabilities

Details

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)

References

Affected packages

Ubuntu:18.04:LTS / grub2-signed

Package

Name: grub2-signed
Purl: pkg:deb/ubuntu/grub2-signed?arch=src?distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.167~18.04.5

Affected versions

1.*

1.85

1.86

1.87

1.89

1.91

1.92

1.93

1.93.1

1.93.2

1.93.3

1.93.4

1.93.5

1.93.7

1.93.8

1.93.10

1.93.11

1.93.13

1.93.14

1.93.15

1.93.16

1.93.18

1.93.19

1.93.20

1.93.21

1.93.22

1.93.24

1.167~18.04.1

1.167~18.04.3

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.167~18.04.5+2.04-1ubuntu44.1.2",
            "binary_name": "grub-efi-amd64-signed"
        },
        {
            "binary_version": "1.167~18.04.5+2.04-1ubuntu44.1.2",
            "binary_name": "grub-efi-arm64-signed"
        }
    ]
}

Ubuntu:18.04:LTS / grub2-unsigned

Package

Name: grub2-unsigned
Purl: pkg:deb/ubuntu/grub2-unsigned?arch=src?distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.04-1ubuntu44.1.2

Affected versions

2.*

2.04-1ubuntu44

2.04-1ubuntu44.1

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2.04-1ubuntu44.1.2",
            "binary_name": "grub-efi-amd64"
        },
        {
            "binary_version": "2.04-1ubuntu44.1.2",
            "binary_name": "grub-efi-amd64-bin"
        },
        {
            "binary_version": "2.04-1ubuntu44.1.2",
            "binary_name": "grub-efi-amd64-dbg"
        },
        {
            "binary_version": "2.04-1ubuntu44.1.2",
            "binary_name": "grub-efi-arm64"
        },
        {
            "binary_version": "2.04-1ubuntu44.1.2",
            "binary_name": "grub-efi-arm64-bin"
        },
        {
            "binary_version": "2.04-1ubuntu44.1.2",
            "binary_name": "grub-efi-arm64-dbg"
        }
    ]
}

Ubuntu:20.04:LTS / grub2-signed

Package

Name: grub2-signed
Purl: pkg:deb/ubuntu/grub2-signed?arch=src?distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.167.2

Affected versions

1.*

1.128

1.129

1.130

1.131

1.133

1.134

1.135

1.136

1.137

1.138

1.139

1.140

1.141

1.142

1.142.1

1.142.3

1.142.4

1.142.5

1.142.6

1.142.8

1.142.9

1.142.10

1.142.11

1.167

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.167.2+2.04-1ubuntu44.2",
            "binary_name": "grub-efi-amd64-signed"
        },
        {
            "binary_version": "1.167.2+2.04-1ubuntu44.2",
            "binary_name": "grub-efi-arm64-signed"
        }
    ]
}

Ubuntu:20.04:LTS / grub2-unsigned

Package

Name: grub2-unsigned
Purl: pkg:deb/ubuntu/grub2-unsigned?arch=src?distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.04-1ubuntu44.2

Affected versions

2.*

2.04-1ubuntu44

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2.04-1ubuntu44.2",
            "binary_name": "grub-efi-amd64"
        },
        {
            "binary_version": "2.04-1ubuntu44.2",
            "binary_name": "grub-efi-amd64-bin"
        },
        {
            "binary_version": "2.04-1ubuntu44.2",
            "binary_name": "grub-efi-amd64-dbg"
        },
        {
            "binary_version": "2.04-1ubuntu44.2",
            "binary_name": "grub-efi-arm64"
        },
        {
            "binary_version": "2.04-1ubuntu44.2",
            "binary_name": "grub-efi-arm64-bin"
        },
        {
            "binary_version": "2.04-1ubuntu44.2",
            "binary_name": "grub-efi-arm64-dbg"
        }
    ]
}