(Pwn2Own) Samsung Galaxy S23 McsWebViewActivity Permissive List of Allowed Inputs Remote Code Execution Vulnerability

June 21st, 2024
ZDI-24-829 ZDI-CAN-22409

CVE ID

CVSS Score

8.8 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors

Samsung

Affected Products

Galaxy S23

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Samsung Galaxy S23 smartphones. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the McsWebViewActivity class. The issue results from a permissive list of allowed inputs. An attacker can leverage this vulnerability to execute code in the context of the current user.

Additional Details

Server Side Fix in SVE-2023-1953.


Disclosure Timeline

  • 2023-11-09 - Vulnerability reported to vendor
  • 2024-06-21 - Coordinated public release of advisory
  • 2024-08-15 - Advisory Updated

Credit

Nguyen Tien Giang & Nguyen Hoang Thach of STAR Labs SG Pte. Ltd.

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