(Pwn2Own) Sony XAV-AX5500 CarPlay TLV Stack-based Buffer Overflow Remote Code Execution Vulnerability

June 21st, 2024
ZDI-24-877 ZDI-CAN-23238

CVE ID

CVE-2024-23933

CVSS Score

6.8 AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

Sony

Affected Products

XAV-AX5500

Vulnerability Details

This vulnerability allows physically present attackers to execute arbitrary code on affected installations of Sony XAV-AX5500 devices. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the implementation of the Apple CarPlay protocol. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the device.

Additional Details

Sony has issued an update to correct this vulnerability. More details can be found at:
https://www.sony.com/electronics/support/mobile-cd-players-digital-media-players-xav-series/xav-ax5500/software/00274156

Disclosure Timeline

  • 2024-02-02 - Vulnerability reported to vendor
  • 2024-06-21 - Coordinated public release of advisory
  • 2024-08-15 - Advisory Updated

Credit

Midnight Blue / PHP Hooligans

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