CVE-2020-11045: Out-of-bounds Read in FreeRDP

Severity: low (CVSS 3.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-05-07 · updated 2026-06-17
Weakness: CWE-125

Description

In FreeRDP after 1.0 and before 2.0.0, there is an out-of-bound read in in update_read_bitmap_data that allows client memory to be read to an image buffer. The result displayed on screen as colour.

Affected products

Canonical Ubuntu Linux: 16.04, 18.04, 19.10, 20.04
Debian Linux: 9.0, 10.0
FreeRDP: from 1.1.0 before 2.0.0 — fixed in 2.0.0

How to fix

Upgrade to a fixed version: FreeRDP 2.0.0. Check the vendor advisory for mitigations.

References

https://github.com/FreeRDP/FreeRDP/commit/f8890a645c221823ac133dbf991f8a65ae50d637
https://github.com/FreeRDP/FreeRDP/issues/6005
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3x39-248q-f4q6
https://lists.debian.org/debian-lts-announce/2020/08/msg00054.html
https://lists.debian.org/debian-lts-announce/2023/10/msg00008.html
https://usn.ubuntu.com/4379-1/
https://usn.ubuntu.com/4382-1/
https://github.com/FreeRDP/FreeRDP/commit/f8890a645c221823ac133dbf991f8a65ae50d637
https://github.com/FreeRDP/FreeRDP/issues/6005
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3x39-248q-f4q6
https://lists.debian.org/debian-lts-announce/2020/08/msg00054.html
https://lists.debian.org/debian-lts-announce/2023/10/msg00008.html

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