REDHAT-BUG-2346118: Integer Overflow
First published: Mon Feb 17 2025(Updated: )
When reading data from a squash4 filesystem, grub's squash4 fs module uses user-controlled parameters from the filesystem geometry to determine the internal buffers size, however it misses to properly check for integer overflows. A maliciously crafted filesystem may lead some of those buffer size calculation to overflow, causing it to perform a grub_malloc() operation with a smaller size than expected. As a result the direct_read() will perform a heap based out-of-bounds write during data reading. This flaw may be leveraged to corrupt grub's internal critical data and may result in arbitrary code execution by-passing secure boot protections.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GRUB for EFI (ARM64) |
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Reference Links
Frequently Asked Questions
What is the severity of REDHAT-BUG-2346118?
The severity of REDHAT-BUG-2346118 is considered high due to potential exploitation through crafted filesystem parameters.
How do I fix REDHAT-BUG-2346118?
To fix REDHAT-BUG-2346118, update GNU GRUB to the latest patched version that addresses this vulnerability.
What systems are affected by REDHAT-BUG-2346118?
Systems running GNU GRUB, particularly those using squash4 filesystems, are affected by REDHAT-BUG-2346118.
What are the potential impacts of exploiting REDHAT-BUG-2346118?
Exploitation of REDHAT-BUG-2346118 may lead to buffer overflows, resulting in denial of service or arbitrary code execution.
Why should I be concerned about REDHAT-BUG-2346118?
You should be concerned about REDHAT-BUG-2346118 as it presents a significant security risk that can compromise system integrity and safety.
- collector/redhat-bugzilla
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- alias/CVE-2025-0678
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- vendor/gnu
- canonical/grub for efi (arm64)