Summary
Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2023-4693: An out-of-bounds read flaw was found on grub2's NTFS filesystem driver. This issue may allow a physically present attacker to present a specially crafted NTFS file system image to read arbitrary memory locations. A successful attack allows sensitive data cached in memory or EFI variable values to be leaked, presenting a high Confidentiality risk. CVE-2023-4692: An out-of-bounds write flaw was found in grub2's NTFS filesystem driver. This issue may allow an attacker to present a specially crafted NTFS filesystem image, leading to grub's heap metadata corruption. In some circumstances, the attack may also corrupt the UEFI firmware heap metadata. As a result, arbitrary code execution and secure boot protection bypass may be achieved.
Fixed packages 19
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2 | grub2 | 1:2.06-14.amzn2.0.2 |
| Amazon Linux · 2 | grub2-common | 1:2.06-14.amzn2.0.2 |
| Amazon Linux · 2 | grub2-debuginfo | 1:2.06-14.amzn2.0.2 |
| Amazon Linux · 2 | grub2-efi-aa64 | 1:2.06-14.amzn2.0.2 |
| Amazon Linux · 2 | grub2-efi-aa64-cdboot | 1:2.06-14.amzn2.0.2 |
| Amazon Linux · 2 | grub2-efi-aa64-ec2 | 1:2.06-14.amzn2.0.2 |
| Amazon Linux · 2 | grub2-efi-aa64-modules | 1:2.06-14.amzn2.0.2 |
| Amazon Linux · 2 | grub2-efi-x64 | 1:2.06-14.amzn2.0.2 |
| Amazon Linux · 2 | grub2-efi-x64-cdboot | 1:2.06-14.amzn2.0.2 |
| Amazon Linux · 2 | grub2-efi-x64-ec2 | 1:2.06-14.amzn2.0.2 |
| Amazon Linux · 2 | grub2-efi-x64-modules | 1:2.06-14.amzn2.0.2 |
| Amazon Linux · 2 | grub2-emu | 1:2.06-14.amzn2.0.2 |
| Amazon Linux · 2 | grub2-emu-modules | 1:2.06-14.amzn2.0.2 |
| Amazon Linux · 2 | grub2-pc | 1:2.06-14.amzn2.0.2 |
| Amazon Linux · 2 | grub2-pc-modules | 1:2.06-14.amzn2.0.2 |
| Amazon Linux · 2 | grub2-tools | 1:2.06-14.amzn2.0.2 |
| Amazon Linux · 2 | grub2-tools-efi | 1:2.06-14.amzn2.0.2 |
| Amazon Linux · 2 | grub2-tools-extra | 1:2.06-14.amzn2.0.2 |
| Amazon Linux · 2 | grub2-tools-minimal | 1:2.06-14.amzn2.0.2 |
Vulnerabilities 2
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High 7.5
Grub2: out-of-bounds write at fs/ntfs.c may lead to unsigned code execution
An out-of-bounds write flaw was found in grub2's NTFS filesystem driver. This issue may allow an attacker to present a specially crafted NTFS filesystem image, leading to grub's heap metadata corruption. In some circumstances, the attack may also corrupt the …
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Medium 5.3
Grub2: out-of-bounds read at fs/ntfs.c
An out-of-bounds read flaw was found on grub2's NTFS filesystem driver. This issue may allow a physically present attacker to present a specially crafted NTFS file system image to read arbitrary memory locations. A successful attack allows sensitive data cach…