(Pwn2Own) Synology DiskStation DS1823xs+ Replication Service Out-Of-Bounds Write Remote Code Execution Vulnerability

April 9th, 2025
ZDI-25-208 ZDI-CAN-25607

CVE ID

CVE-2024-10442

CVSS Score

7.5 AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

Synology

Affected Products

DiskStation DS1823xs+

Vulnerability Details

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Synology DiskStation DS1823xs+ devices. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the parsing of command data in the libsynobtrfsreplicacore.so.7 module. 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.

Additional Details

Synology has issued an update to correct this vulnerability. More details can be found at:
https://www.synology.com/en-us/security/advisory/Synology_SA_24_22

Disclosure Timeline

  • 2024-12-02 - Vulnerability reported to vendor
  • 2025-04-09 - Coordinated public release of advisory
  • 2025-04-09 - Advisory Updated

Credit

Jack Dates of RET2 Systems

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