תיאור (מקור, אנגלית)
A stack overflow vulnerability exists in the WebCam Server Login functionality of GeoVision GV-VMS V20 20.0.2. A specially crafted HTTP request can lead to an arbitrary code execution. An attacker can make an unauthenticated HTTP request to trigger this vulnerability. #### Stack-overflow via unconstrained sscanf The call to `sscanf` at [1] to split the `Buffer` variable into the `username` and `password` variables doesn't limit the size of the extracted content to match the destination buffers' sizes. In this case, if either the username or password decoded from the authorization string exceeds `40` characters (the size the stack variables `username` and `password`) then a stack overflow will occur. The data is controlled by an attacker, but sronger constraints (e.g. no null bytes) may make exploitation harder. A successful attack could lead to full code execution as SYSTEM on the machine running the service.
מוצרים מושפעים
geovision: gv-vms firmware; geovision: gv-vms
קישורים2
- www.geovision.com.tw/cyber_security.php Vendor Advisory
- talosintelligence.com/vulnerability_reports/ Third Party Advisory
מדדים
- CVSS 3.1
-
9.0
CRITICAL
מקור הציון: NVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - EPSS — סבירות ניצול
- 0% אחוזון 42 · נכון ל-13 בנובמבר 2026
- CWE
- CWE-787
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