HOMEVULNERABILITIESCVE-2023-39352
CRITICAL

CVE-2023-39352

CWE-787Published: August 31, 2023· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

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.

NVD Source

Risk Analysis

Invalid offset validation in FreeRDP can result in an out-of-bounds write, potentially causing crashes. It is rated critical with a 9.8 CVSS score and is remotely exploitable.

No public exploit is known, and it is not in the CISA KEV. The vulnerability is remotely exploitable.

Recommended Action

Upgrade to FreeRDP version 2.11.0 or 3.0.0-beta3 to fix the offset validation logic.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-39352 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Debian1 product(s)
debian linux
Fedora1 product(s)
fedora
FreeRDP1 product(s)
freerdp
Source: NVD CPE · 6 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-whwr-qcf2-2mvj
ADVISORYhttps://lists.debian.org/debian-lts-announce/2023/10/msg00008.html
ADVISORYhttps://security.gentoo.org/glsa/202401-16
ADVISORYhttps://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-whwr-qcf2-2mvj
ADVISORYhttps://lists.debian.org/debian-lts-announce/2023/10/msg00008.html
ADVISORYhttps://security.gentoo.org/glsa/202401-16

All References (15)

→
https://github.com/FreeRDP/FreeRDP/blob/63a2f65618748c12f79ff7450d46c6e194f2db76/libfreerdp/gdi/gfx.c#L1219-L1239Issue Tracking
→
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-whwr-qcf2-2mvjExploit · Vendor Advisory
→
https://lists.debian.org/debian-lts-announce/2023/10/msg00008.htmlMailing List · Third Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A6LLDAPEXRDJOM3PREDDD267SSNT77DP/Mailing List
→
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IHMTGKCZXJPQOR5ZD2I4GPDNP2DKRXMF/Mailing List
→
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OH2ATH2BKDNKCJAU4WPPXK4SHLE3UJUV/Mailing List
→
https://security.gentoo.org/glsa/202401-16Third Party Advisory
→
https://github.com/FreeRDP/FreeRDP/blob/63a2f65618748c12f79ff7450d46c6e194f2db76/libfreerdp/gdi/gfx.c#L1219-L1239Issue Tracking
→
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-whwr-qcf2-2mvjExploit · Vendor Advisory
→
https://lists.debian.org/debian-lts-announce/2023/10/msg00008.htmlMailing List · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2025/02/msg00016.html
→
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A6LLDAPEXRDJOM3PREDDD267SSNT77DP/Mailing List
→
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IHMTGKCZXJPQOR5ZD2I4GPDNP2DKRXMF/Mailing List
→
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OH2ATH2BKDNKCJAU4WPPXK4SHLE3UJUV/Mailing List
→
https://security.gentoo.org/glsa/202401-16Third Party Advisory

Quick Facts

CVE IDCVE-2023-39352
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-787
CISA KEVNo
Affected3 vendor(s)
PublishedAug 31, 2023

Related CVEs (CWE-787)

CVE-2009-2466
10.0
CVE-2026-4746
10.0
CVE-2004-1287
10.0
CVE-2004-0574
10.0
CVE-2018-10718
10.0
CVE-2002-2227
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-39352 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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