ZDI-26-486: (Pwn2Own) Kenwood DNR1007XR tchdr_bytestream_read Out-Of-Bounds Write Code Execution Vulnerability
This vulnerability allows physically present attackers to execute arbitrary code on affected installations of Kenwood DNR1007XR devices. Authentication is not required to exploit this vulnerability. The specific flaw exists within the tchdrbytestreamread function. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of root.
Other sources
This vulnerability allows physically present attackers to execute arbitrary code on affected installations of Kenwood DNR1007XR devices. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 6.8. The following CVEs are assigned: CVE-2026-18269.
— ZDI
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Kenwood DNR1007XRto a version that resolves this vulnerability.Patch ZDI-26-486 - Compensating control
Since exploitation does not require authentication and can be performed by physically present attackers, restrict physical access to Kenwood DNR1007XR devices (e.g., lock down the device locations and require authorized personnel for any on-site interaction).
- Compensating control
If the devices expose management services over the network, restrict access to those interfaces (management/web/SSH/HTTP(S) ports) to trusted IP addresses only to reduce the ability to interact with the device in support of exploitation.
Event History
Frequently Asked Questions
What is the severity of ZDI-26-486?
ZDI-26-486 has a CVSS rating of 6.8, indicating a medium level of risk.
How do I fix ZDI-26-486?
Currently, there is no official fix available for ZDI-26-486, so it is advisable to limit physical access to the affected devices.
Who is affected by ZDI-26-486?
The vulnerability affects installations of the Kenwood DNR1007XR device.
Can ZDI-26-486 be exploited remotely?
No, ZDI-26-486 requires physical presence to exploit the vulnerability.
What type of vulnerability is ZDI-26-486?
ZDI-26-486 is classified as an out-of-bounds write code execution vulnerability.