Synology-SA-22:02 Samba

Publish Time: 2022-01-27 18:50:45 UTC+8

Last Updated: 2022-04-15 18:38:33 UTC+8

Severity
Important
Status
Resolved

Abstract

A vulnerability allows remote authenticated users to execute arbitrary code via a susceptible version of Synology DiskStation Manager (DSM).

Affected Products

Product Severity Fixed Release Availability
DSM 7.0 Not affected N/A
DSM 6.2 Important Upgrade to 6.2.4-25556-4 or above.
DSMUC 3.1 Not affected N/A
VS960HD Not affected N/A
SRM 1.2 Not affected N/A

Mitigation

If you need immediate assistance, please contact Synology technical support via https://account.synology.com/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

Revision

Revision Date Description
1 2022-01-27 Initial public release.
2 2022-02-02 Disclosed vulnerability details.