Article: Samba bug can let remote attackers execute code as root

h0w1tzr’s Comments: This is another doozy of a vulnerability against modern day Linux systems, and I would HIGHLY recommend that you patch your systems IMMEDIATELY!

Samba has addressed a critical severity vulnerability that can let attackers gain remote code execution with root privileges on servers running vulnerable software.

Samba is an SMB networking protocol re-implementation that provides file sharing and printing services across many platforms, allowing Linux, Windows, and macOS users to share files over a network.

The vulnerability, tracked as CVE-2021-44142 and reported by Orange Tsai of DEVCORE, is an out-of-bounds heap read/write present in the vfs_fruit VFS module when parsing EA metadata when opening files in smbd.

“The problem in vfs_fruit exists in the default configuration of the fruit VFS module using fruit:metadata=netatalk or fruit:resource=file,” Samba explained in a security advisory published today.

“If both options are set to different settings than the default values, the system is not affected by the security issue.”

The vulnerable vfs_fruit module is designed to provide enhanced compatibility with Apple SMB clients and Netatalk 3 AFP fileservers.

According to the CERT Coordination Center (CERT/CC), the list of platforms impacted by this vulnerability includes Red Hat, SUSE Linux, and Ubuntu.


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