CVE-2023-53420

Summary

In the Linux kernel, the following vulnerability has been resolved:

ntfs: Fix panic about slab-out-of-bounds caused by ntfs_listxattr()

Here is a BUG report from syzbot:

BUG: KASAN: slab-out-of-bounds in ntfs_list_ea fs/ntfs3/xattr.c:191 [inline] BUG: KASAN: slab-out-of-bounds in ntfs_listxattr+0x401/0x570 fs/ntfs3/xattr.c:710 Read of size 1 at addr ffff888021acaf3d by task syz-executor128/3632

Call Trace: ntfs_list_ea fs/ntfs3/xattr.c:191 [inline] ntfs_listxattr+0x401/0x570 fs/ntfs3/xattr.c:710 vfs_listxattr fs/xattr.c:457 [inline] listxattr+0x293/0x2d0 fs/xattr.c:804

Fix the logic of ea_all iteration. When the ea->name_len is 0, return immediately, or Add2Ptr() would visit invalid memory in the next loop.

[almaz.alexandrovich@paragon-software.com: lines of the patch have changed]

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxbe71b5cba2e6485e8959da7a9f9a44461a1bb074 < f3380d895e28a32632eb3609f5bd515adee4e5a1affected
LinuxLinuxbe71b5cba2e6485e8959da7a9f9a44461a1bb074 < c86a2517df6c9304db8fb12b77136ec7a5d85994affected
LinuxLinuxbe71b5cba2e6485e8959da7a9f9a44461a1bb074 < 721b75ea2dfce53a8890dff92ae01afca8e74f88affected
LinuxLinuxbe71b5cba2e6485e8959da7a9f9a44461a1bb074 < 3c675ddffb17a8b1e32efad5c983254af18b12c2affected
LinuxLinux5.15affected
LinuxLinux0 < 5.15unaffected
LinuxLinux5.15.121 <= 5.15.*unaffected
LinuxLinux6.1.39 <= 6.1.*unaffected
LinuxLinux6.4.4 <= 6.4.*unaffected
LinuxLinux6.5 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References