CVE-2020-11047: Out-of-bounds Read in FreeRDP

Severity: medium (CVSS 5.9 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 1.1 and before 2.0.0, there is an out-of-bounds read in autodetect_recv_bandwidth_measure_results. A malicious server can extract up to 8 bytes of client memory with a manipulated message by providing a short input and reading the measurement result data. This has been patched in 2.0.0.

Affected products

Canonical Ubuntu Linux: 18.04, 19.10, 20.04
Debian Linux: 10.0
FreeRDP: from 1.1.0 (excl.) 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/f5e73cc7c9cd973b516a618da877c87b80950b65
https://github.com/FreeRDP/FreeRDP/issues/6009
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9fw6-m2q8-h5pw
https://lists.debian.org/debian-lts-announce/2023/10/msg00008.html
https://usn.ubuntu.com/4379-1/
https://github.com/FreeRDP/FreeRDP/commit/f5e73cc7c9cd973b516a618da877c87b80950b65
https://github.com/FreeRDP/FreeRDP/issues/6009
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9fw6-m2q8-h5pw
https://lists.debian.org/debian-lts-announce/2023/10/msg00008.html
https://usn.ubuntu.com/4379-1/

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