Advisory Details

May 23rd, 2024

(Pwn2Own) TP-Link Omada ER605 Comexe DDNS Response Handling Heap-based Buffer Overflow Remote Code Execution Vulnerability

ZDI-24-500
ZDI-CAN-22383

CVE ID CVE-2024-5228
CVSS SCORE 7.5, AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS TP-Link
AFFECTED PRODUCTS Omada ER605
VULNERABILITY DETAILS

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link Omada ER605 routers. Authentication is not required to exploit this vulnerability. However, devices are vulnerable only if configured to use the Comexe DDNS service.

The specific flaw exists within the handling of DNS responses. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of root.

ADDITIONAL DETAILS

Fixed in firmware ER605 (UN) _V2_2. 2.4 Build 20240119
https://www.tp-link.com/en/support/download/er605/#Firmware


DISCLOSURE TIMELINE
  • 2023-11-09 - Vulnerability reported to vendor
  • 2024-05-23 - Coordinated public release of advisory
CREDIT @vcslab
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