CVE-2021-41160 Information

Description

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.

CVSS Vector

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

Reference

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-7c9r-6r2q-93qg https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DWJXQOWKNR7O5HM2HFJOM4GBUFPTE3RG/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZXCR73EDVPLI6TRWRAWJCJ7OBYDKBB74/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WIZUPVRGCWUDAPDOQVUGUIYUO7UWKMXX/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8