Integer Overflow to Buffer Overflow Affecting freerdp-devel package, versions <2:2.2.0-1.el8


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.1% (44th percentile)

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  • Snyk IDSNYK-ALMALINUX8-FREERDPDEVEL-5652083
  • published28 May 2023
  • disclosed18 May 2021

Introduced: 18 May 2021

CVE-2020-15103  (opens in a new tab)
CWE-680  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 freerdp-devel to version 2:2.2.0-1.el8 or higher.
This issue was patched in ALSA-2021:1849.

NVD Description

Note: Versions mentioned in the description apply only to the upstream freerdp-devel package and not the freerdp-devel package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

In FreeRDP less than or equal to 2.1.2, an integer overflow exists due to missing input sanitation in rdpegfx channel. All FreeRDP clients are affected. The input rectangles from the server are not checked against local surface coordinates and blindly accepted. A malicious server can send data that will crash the client later on (invalid length arguments to a memcpy) This has been fixed in 2.2.0. As a workaround, stop using command line arguments /gfx, /gfx-h264 and /network:auto

CVSS Scores

version 3.1