Informazioni sul CVE-2024-41013
xfs: don't walk off the end of a directory data block
CWE ID: N/A
Base Score (CVSS): N/A
CVE: CVE-2024-41013
Descrizione: In the Linux kernel, the following vulnerability has been fixed: xfs: don’t walk off the end of a directory data block This adds sanity checks for xfs_dir2_data_unused and xfs_dir2_data_entry to ensure don’t stray beyond valid memory region. Before patching, the loop simply checks that the start offset of the dup and dep is within the range. So in a crafted image, if the last entry is xfs_dir2_data_unused, we can change dup->length to dup->length-1 and leave 1 byte of space. In the next traversal, this space will be considered as dup or dep. We may encounter an out-of-bounds read when accessing the fixed members. In the patch, we ensure that the remaining bytes are large enough to hold an unused entry before accessing xfs_dir2_data_unused and xfs_dir2_data_unused is XFS_DIR2_DATA_ALIGN byte aligned. We also ensure that the remaining bytes are large enough to hold a dirent with a single-byte name before accessing xfs_dir2_data_entry.
Vettore di attacco
Punteggio CVSS
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Riassunto: .
Dettaglio del Vettore
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Riferimenti esterni
- https://git.kernel.org/stable/c/ca96d83c93071f95cf962ce92406621a472df31b
- https://git.kernel.org/stable/c/0c7fcdb6d06cdf8b19b57c17605215b06afa864a
Prodotti interessati
- Linux – Linux
- Linux – Linux