Advisory Details

June 21st, 2024

(Pwn2Own) Synology BC500 synocam_param.cgi Stack-based Buffer Overflow Remote Code Execution Vulnerability

CVE ID
CVSS SCORE	8.8, AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Synology
AFFECTED PRODUCTS	BC500
VULNERABILITY DETAILS	This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Synology BC500 cameras. Authentication is not required to exploit this vulnerability. The specific flaw exists within the synocam_param.cgi module. 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 root.
ADDITIONAL DETAILS	Synology has issued an update to correct this vulnerability. More details can be found at: https://www.synology.com/en-id/security/advisory/Synology_SA_23_15
DISCLOSURE TIMELINE	2023-11-09 - Vulnerability reported to vendor 2024-06-21 - Coordinated public release of advisory 2024-07-01 - Advisory Updated
CREDIT	Freddy Ma, Jimmy Chang, Jimmy Liu (DrmnSamoLiu), Kyo Chen, Nancy Chang, Sébastien Dusuel (DuSu)

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