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6 vulnerabilities found for grub2 in Ubuntu by Ubuntu
CVE-2020-15707 (GCVE-0-2020-15707)
Vulnerability from nvd – Published: 2020-07-29 17:45 – Updated: 2024-09-17 03:07
VLAI
Title
GRUB2 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.
Summary
Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. This issue affects GRUB2 version 2.04 and prior versions.
Severity
5.7 (Medium)
CWE
- CWE-362 - Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization)
Assigner
References
17 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Ubuntu | grub2 in Ubuntu |
Affected:
20.04 LTS , < 2.04-1ubuntu26.1
(custom)
Affected: 18.04 LTS , < 2.02-2ubuntu8.16 (custom) Affected: 16.04 LTS , < 2.02~beta2-36ubuntu3.26 (custom) Affected: 14.04 ESM , < 2.02~beta2-9ubuntu1.20 (custom) |
Date Public
2020-07-29 00:00
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CVE-2020-15706 (GCVE-0-2020-15706)
Vulnerability from nvd – Published: 2020-07-29 17:45 – Updated: 2024-09-16 22:20
VLAI
Title
GRUB2 contains a race condition leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing.
Summary
GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions.
Severity
6.4 (Medium)
CWE
- CWE-362 - Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization)
Assigner
References
17 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Ubuntu | grub2 in Ubuntu |
Affected:
20.04 LTS , < 2.04-1ubuntu26.1
(custom)
Affected: 18.04 LTS , < 2.02-2ubuntu8.16 (custom) Affected: 16.04 LTS , < 2.02~beta2-36ubuntu3.26 (custom) Affected: 14.04 ESM , < 2.02~beta2-9ubuntu1.20 (custom) |
Date Public
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CVE-2020-15705 (GCVE-0-2020-15705)
Vulnerability from nvd – Published: 2020-07-29 17:45 – Updated: 2024-09-17 00:06
VLAI
Title
GRUB2: avoid loading unsigned kernels when GRUB is booted directly under secureboot without shim
Summary
GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions.
Severity
6.4 (Medium)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
20 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Ubuntu | grub2 in Ubuntu |
Affected:
20.04 LTS , < 2.04-1ubuntu26.1
(custom)
Affected: 18.04 LTS , < 2.02-2ubuntu8.16 (custom) Affected: 16.04 LTS , < 2.02~beta2-36ubuntu3.26 (custom) Affected: 14.04 ESM , < 2.02~beta2-9ubuntu1.20 (custom) |
Date Public
2020-07-29 00:00
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CVE-2020-15707 (GCVE-0-2020-15707)
Vulnerability from cvelistv5 – Published: 2020-07-29 17:45 – Updated: 2024-09-17 03:07
VLAI
Title
GRUB2 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.
Summary
Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. This issue affects GRUB2 version 2.04 and prior versions.
Severity
5.7 (Medium)
CWE
- CWE-362 - Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization)
Assigner
References
17 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Ubuntu | grub2 in Ubuntu |
Affected:
20.04 LTS , < 2.04-1ubuntu26.1
(custom)
Affected: 18.04 LTS , < 2.02-2ubuntu8.16 (custom) Affected: 16.04 LTS , < 2.02~beta2-36ubuntu3.26 (custom) Affected: 14.04 ESM , < 2.02~beta2-9ubuntu1.20 (custom) |
Date Public
2020-07-29 00:00
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CVE-2020-15706 (GCVE-0-2020-15706)
Vulnerability from cvelistv5 – Published: 2020-07-29 17:45 – Updated: 2024-09-16 22:20
VLAI
Title
GRUB2 contains a race condition leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing.
Summary
GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions.
Severity
6.4 (Medium)
CWE
- CWE-362 - Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization)
Assigner
References
17 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Ubuntu | grub2 in Ubuntu |
Affected:
20.04 LTS , < 2.04-1ubuntu26.1
(custom)
Affected: 18.04 LTS , < 2.02-2ubuntu8.16 (custom) Affected: 16.04 LTS , < 2.02~beta2-36ubuntu3.26 (custom) Affected: 14.04 ESM , < 2.02~beta2-9ubuntu1.20 (custom) |
Date Public
2020-07-29 00:00
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CVE-2020-15705 (GCVE-0-2020-15705)
Vulnerability from cvelistv5 – Published: 2020-07-29 17:45 – Updated: 2024-09-17 00:06
VLAI
Title
GRUB2: avoid loading unsigned kernels when GRUB is booted directly under secureboot without shim
Summary
GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions.
Severity
6.4 (Medium)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
20 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Ubuntu | grub2 in Ubuntu |
Affected:
20.04 LTS , < 2.04-1ubuntu26.1
(custom)
Affected: 18.04 LTS , < 2.02-2ubuntu8.16 (custom) Affected: 16.04 LTS , < 2.02~beta2-36ubuntu3.26 (custom) Affected: 14.04 ESM , < 2.02~beta2-9ubuntu1.20 (custom) |
Date Public
2020-07-29 00:00
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