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Fencer Vulns
medium 5.3

CVE-2023-39352 json

Invalid offset validation leading to Out Of Bound Write in FreeRDP

published 2023-08-31 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-43078

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 75%
public exploits
0
none known

Summary

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Affected versions are subject to an invalid offset validation leading to Out Of Bound Write. This can be triggered when the values `rect->left` and `rect->top` are exactly equal to `surface->width` and `surface->height`. eg. `rect->left` == `surface->width` && `rect->top` == `surface->height`. In practice this should cause a crash. This issue has been addressed in versions 2.11.0 and 3.0.0-beta3. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Patch / fix

  • freerdp freerdp 2.11.0
  • freerdp2 Debian 12 2.11.7+dfsg1-6~deb12u1

debian advisories DEBIAN-CVE-2023-39352

  • freerdp2 Ubuntu 20.04 LTS 2.2.0+dfsg1-0ubuntu0.20.04.6
  • freerdp2 Ubuntu 22.04 LTS 2.6.1+dfsg1-3ubuntu2.5
  • freerdp2 Ubuntu Pro 18.04 LTS 2.2.0+dfsg1-0ubuntu0.18.04.4+esm2

ubuntu advisories UBUNTU-CVE-2023-39352

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • freerdp RHEL 9 2:2.11.2-1.el9
  • libwinpr RHEL 9 2:2.11.2-1.el9
  • freerdp-libs RHEL 9 2:2.11.2-1.el9

red hat advisories RHSA-2024:2208

  • freerdp SLE Workstation Extension 15 SP5, SLE Workstation Extension 15 SP4, SLE Module for Package Hub 15 SP5 +3 more 2.4.0-150400.3.23.1
  • freerdp SLE Workstation Extension 12 SP5, SLE Software Development Kit 12 SP5 2.1.2-12.38.1

suse advisories SUSE-SU-2023:4893-1SUSE-SU-2023:4611-1

  • freerdp2 openSUSE Tumbleweed 2.11.2-3.1

opensuse advisories openSUSE-SU-2024:13504-1

  • freerdp AlmaLinux 9 2:2.11.2-1.el9
  • libwinpr AlmaLinux 9 2:2.11.2-1.el9
  • freerdp-libs AlmaLinux 9 2:2.11.2-1.el9

almalinux advisories ALSA-2024:2208

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-39352 updated cvss 7.5

freerdp: invalid offset validation leading to Out Of Bound Write

  • Red Hat Enterprise Linux 6 freerdp, freerdp-libs, freerdp-plugins Red Hat Enterprise Linux 7 freerdp, libwinpr, freerdp-libs, freerdp-plugins
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 freerdp, libwinpr, freerdp-libs
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 9) freerdp 2.11.2-1.el9, libwinpr 2.11.2-1.el9, freerdp-libs 2.11.2-1.el9 Red Hat Enterprise Linux CRB (v. 9) freerdp-devel 2.11.2-1.el9, libwinpr-devel 2.11.2-1.el9, freerdp-debuginfo 2.11.2-1.el9, libwinpr-debuginfo 2.11.2-1.el9, freerdp-debugsource 2.11.2-1.el9, freerdp-libs-debuginfo 2.11.2-1.el9
    fixed: vendor fix RHSA-2024:2208

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.54% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-whwr-qcf2-2mvj referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • FreeRDP FreeRDP

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.