QSAN Responds to CVE-2021-44142: SAMBA

A vulnerability allows remote authenticated users to execute arbitrary code via a susceptible version of QSM OS.

Applied to

Mitigation

If you need immediate assistance, please contact Synology technical support via https://www.qsan.com/en/technical_support.

Detail

• CVE-2021-44142

  • Severity: Important

  • CVSS3 Base Score: 8.8

  • CVSS3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Reference

• VU#119678

• CVE-2021-44142

• Download Center | QSAN