EUVD-2025-16688
CVSS VectorNVD
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionNVD
Sonos Era 300 Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected Sonos Era 300 speakers. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the processing of ALAC data. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the anacapa user. Was ZDI-CAN-25865.
AnalysisAI
Heap-based buffer overflow vulnerability in Sonos Era 300 speakers that allows unauthenticated, network-adjacent attackers to execute arbitrary code with high severity (CVSS 8.8). The flaw exists in ALAC (Apple Lossless Audio Codec) data processing where insufficient length validation enables buffer overflow conditions. This vulnerability poses significant risk as it requires no authentication, no user interaction, and can be exploited by any attacker on the local network segment to achieve remote code execution in the context of the anacapa user.
Technical ContextAI
The vulnerability resides in the ALAC (Apple Lossless Audio Codec) parsing subsystem of the Sonos Era 300 speaker. ALAC is an audio codec format commonly used in Apple ecosystems and supported by various third-party devices for compatibility. The root cause is classified as CWE-122 (Heap-based Buffer Overflow), which occurs when the device processes ALAC-encoded audio frames without properly validating the length field of user-supplied data before copying it into a fixed-size heap buffer. This is a classic memory safety issue where attacker-controlled audio frame length parameters can exceed allocated buffer boundaries, enabling heap memory corruption. The anacapa user context suggests execution occurs within a specific service or process responsible for audio processing on the device. The vulnerability was previously tracked as ZDI-CAN-25865 in the Zero Day Initiative disclosure pipeline.
RemediationAI
Immediate remediation requires: (1) Upgrade Sonos Era 300 firmware to the patched version released by Sonos (specific version number not provided in supplied data—consult Sonos security advisory or product support for current patched firmware version); (2) Ensure automatic firmware updates are enabled on the Era 300 device (navigate to Sonos app settings > System > [Device] > About and verify auto-update is enabled); (3) As temporary mitigation pending patch deployment, restrict network access to the Era 300 device by: isolating it on a guest/IoT VLAN with restricted access controls, disabling remote access features if available, or temporarily disconnecting from the network if the device is non-critical. (4) Monitor Sonos official security advisories at sonos.com/security for patch release announcements and apply updates immediately upon availability. Workarounds are limited due to the network-adjacent unauthenticated nature of the attack; patching is the primary remediation path.
Share
External POC / Exploit Code
Leaving vuln.today