SB2022051734 - IBM Spectrum Scale update for Samba

Description

This security bulletin contains information about 1 security vulnerability.

1) Out-of-bounds write (CVE-ID: CVE-2021-44142)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing EA metadata while opening files in smbd within the VFS Samba module (vfs_fruit). A remote attacker with ability to write to file's extended attributes can trigger an out-of-bounds write and execute arbitrary code with root privileges.

Note, the vulnerability in vfs_fruit exists in the default configuration of the fruit VFS module using fruit:metadata=netatalk or fruit:resource=file.

Remediation

Install update from vendor's website.

References

• https://www.ibm.com/blogs/psirt/security-bulletin-a-vulnerability-in-samba-affects-ibm-spectrum-scale-smb-protocol-access-method-cve-2021-44142/"
• https://www.ibm.com/blogs/psirt/security-bulletin-a-vulnerability-in-samba-affects-ibm-spectrum-scale-smb-protocol-access-method-cve-2021-44142/</a></p><p>
• https://www.ibm.com/support/pages/node/6585728</p><p><br></p>