Executive brief
GeoVision GV-VMS is a video management system used to monitor and manage security camera feeds. A vulnerability in its WebCam Server component allows an unauthenticated attacker to remotely execute malicious code by sending a specially crafted login request. This could lead to a complete takeover of the surveillance system, potentially exposing sensitive video data or disrupting security operations.
Technical details
A stack-based buffer overflow (CWE-787) exists in the WebCam Server component of GeoVision GV-VMS V20 version 20.0.2. The vulnerability is located within the login logging routine, where the application uses 'strcpy' to copy a user-provided 'id' (username) field from an HTTP request into a fixed-size stack buffer without length validation. An unauthenticated remote attacker can exploit this by sending a specially crafted HTTP request with an oversized username string to overwrite the return address and achieve arbitrary code execution. The risk is heightened because the affected binary was reportedly compiled without Address Space Layout Randomization (ASLR). GeoVision has addressed this in version 21.0.0.
Affected products
- GeoVision GV-VMS V20 20.0.2
Timeline
- 2026-05-04: advisory: Initial NVD publication
- 2026-06-15: disclosed: Detailed Talos advisory released
- 2026-04-27: patched: Vendor advisory indicates completion of security updates