Vulnerability · Published Jun 6, 2024 · Assigned by zdi

CVE-2024-5256Sonos Era 100 SMB2 Message Handling Integer Underflow Information Disclosure Vulnerability

Medium 4.3

In plain English

A medium-severity security flaw in Era 100 from Sonos. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities).

Severity (CVSS 3.0)4.3Medium

Exploit odds (30 days)0.4%top 63.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Sonos Era 100 SMB2 Message Handling Integer Underflow Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of Sonos Era 100 smart speakers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of SMB2 messages. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before reading from memory. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root. Was ZDI-CAN-22336.

Affected products (as reported)

Vendor	Product	Versions
Sonos	Era 100	15.9 (build 75146030)

Weakness: CWE-191 · Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

ZDI-24-542 x_research-advisory