CVE-2021-41160 Improper region checks in FreeRDP allow out of bound write to memory

2021-10-2100:00:00

CWE-787

GitHub_M

www.cve.org

5.3 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N

9 High

AI Score

Confidence

High

0.006 Low

EPSS

Percentile

79.2%

JSON

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. In affected versions a malicious server might trigger out of bound writes in a connected client. Connections using GDI or SurfaceCommands to send graphics updates to the client might send 0 width/height or out of bound rectangles to trigger out of bound writes. With 0 width or heigth the memory allocation will be 0 but the missing bounds checks allow writing to the pointer at this (not allocated) region. This issue has been patched in FreeRDP 2.4.1.

CNA Affected

[
  {
    "vendor": "FreeRDP",
    "product": "FreeRDP",
    "versions": [
      {
        "version": "< 2.4.1",
        "status": "affected"
      }
    ]
  }
]