(0Day) (Pwn2Own) Pioneer DMH-WT7600NEX Telematics Improper Certificate Validation Vulnerability
Vulnerability Details
This vulnerability allows network-adjacent attackers to compromise the integrity of downloaded information on affected installations of Pioneer DMH-WT7600NEX devices. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the telematics functionality, which operates over HTTPS. The issue results from the lack of proper validation of the certificate presented by the server. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root.
Additional Details
01/24/24 – ZDI reported the vulnerability to the vendor at Pwn2Own Automotive.
07/30/24 – ZDI asked for an update.
07/30/24 – The vendor states that they have been working on the vulnerability reported at Pwn2Own, but more countermeasures are required. They also stated that they would get back to us once they get a status update from their design department.
07/31/24 – ZDI informed the vendor that since the vulnerability remains unpatched, that we intend to publish the report as a zero-day advisory on 08/01/24.
-- Mitigation: Given the nature of the vulnerability, the only salient mitigation strategy is to restrict interaction with the application
On 12/19/24 The vendor addressed the issue here: https://jpn.pioneer/ja/car/dl/dmh-sz700_sf700/
Disclosure Timeline
- 2024-02-02 - Vulnerability reported to vendor
- 2024-08-01 - Coordinated public release of advisory
- 2025-03-25 - Advisory Updated
Credit
NCC Group EDG (@nccgroupinfosec @_mccaulay @alexjplaskett)
