CVE-2023-53035
HighSummary
W jądrze Linuxa zidentyfikowano podatność w funkcji pomocniczej ioctl nilfs_ioctl_wrap_copy(), która może kopiować niezainicjowane obszary bufora do pamięci użytkownika w przypadku poleceń ioctl tylko do odczytu. Problem występuje, gdy rozmiar elementu metadanych w przestrzeni użytkownika jest większy niż rozmiar elementu metadanych po stronie systemu plików.
Risk Assessment
Ta podatność może prowadzić do ujawnienia wrażliwych informacji z pamięci jądra do przestrzeni użytkownika, co stwarza ryzyko dla bezpieczeństwa systemu. Organizacje powinny być świadome potencjalnych wycieków danych, które mogą wynikać z tej luki.
Recommendation
Zaleca się aktualizację jądra Linux do najnowszej wersji, w której ta podatność została naprawiona. Należy również monitorować systemy pod kątem nieautoryzowanego dostępu do danych.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix kernel-infoleak in nilfs_ioctl_wrap_copy() The ioctl helper function nilfs_ioctl_wrap_copy(), which exchanges a metadata array to/from user space, may copy uninitialized buffer regions to user space memory for read-only ioctl commands NILFS_IOCTL_GET_SUINFO and NILFS_IOCTL_GET_CPINFO. This can occur when the element size of the user space metadata given by the v_size member of the argument nilfs_argv structure is larger than the size of the metadata element (nilfs_suinfo structure or nilfs_cpinfo structure) on the file system side. KMSAN-enabled kernels detect this issue as follows: BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:121 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_user+0xc0/0x100 lib/usercopy.c:33 instrument_copy_to_user include/linux/instrumented.h:121 [inline] _copy_to_user+0xc0/0x100 lib/usercopy.c:33 copy_to_user include/linux/uaccess.h
Vulnerability data from NVD (NIST) · CISA KEV · EPSS