CVE-2023-27353

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-04-20 · updated 2026-06-17
Weakness: CWE-125

Description

This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of Sonos One Speaker 70.3-35220. Authentication is not required to exploit this vulnerability. The specific flaw exists within the msprox endpoint. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root. Was ZDI-CAN-19846.

Affected products

Sonos One Firmware: 70.3-35220
Sonos S1: before 11.7.1 — fixed in 11.7.1
Sonos S2: before 15.1 — fixed in 15.1

How to fix

Upgrade to a fixed version: Sonos S1 11.7.1; Sonos S2 15.1. Check the vendor advisory for mitigations.

References

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