Advisory Details

April 14th, 2023

(Pwn2Own) Sonos One Speaker libsmb2 Use-After-Free Remote Code Execution Vulnerability

ZDI-23-447
ZDI-CAN-19845

CVE ID CVE-2023-27352
CVSS SCORE 8.8, AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS Sonos
AFFECTED PRODUCTS One Speaker
VULNERABILITY DETAILS

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Sonos One Speaker. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the processing of the SMB directory query command. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of root.

ADDITIONAL DETAILS

Sonos users with the S2 app installed should ensure their system is running software version 15.1 or later. Sonos users with the S1 app installed should be running version 11.7.1 or later. Users can check which software version they are running in the Sonos app > Settings > System > About My System.
https://support.sonos.com/en-us/article/release-notes-for-sonos-s2


DISCLOSURE TIMELINE
  • 2023-02-08 - Vulnerability reported to vendor
  • 2023-04-14 - Coordinated public release of advisory
CREDIT Toan (suto) Pham and Tri Dang from Qrious Secure
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