CVE-2021-44142

The Samba vfs_fruit module uses extended file attributes (EA, xattr) to
provide “…enhanced compatibility with Apple SMB clients and
interoperability with a Netatalk 3 AFP fileserver.” Samba versions prior to
4.13.17, 4.14.12 and 4.15.5 with vfs_fruit configured allow out-of-bounds
heap read and write via specially crafted extended file attributes. A
remote attacker with write access to extended file attributes can execute
arbitrary code with the privileges of smbd, typically root.

Bugs

• <https://bugzilla.samba.org/show_bug.cgi?id=14914&gt;