ZDI-26-155: (Pwn2Own) Philips Hue Bridge hap_pair_verify_handler Sub-TLV Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Philips Hue Bridge. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the happairverifyhandler function of the hkhap service, which listens on TCP port 8080 by default. 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 root.
Other sources
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Philips Hue Bridge. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The ZDI has assigned a CVSS rating of 8.0. The following CVEs are assigned: CVE-2026-3557.
— ZDI
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-26-155?
The severity of ZDI-26-155 is critical due to its potential for remote code execution.
How do I fix ZDI-26-155?
To fix ZDI-26-155, ensure that your Philips Hue Bridge is updated to the latest firmware version provided by Philips.
Who is affected by ZDI-26-155?
ZDI-26-155 affects installations of the Philips Hue Bridge that are accessible to network-adjacent attackers.
What types of attacks can ZDI-26-155 facilitate?
ZDI-26-155 can facilitate arbitrary code execution attacks on vulnerable Philips Hue Bridge devices.
Is authentication required to exploit ZDI-26-155?
Yes, authentication is required to exploit the vulnerability described in ZDI-26-155.