PT-2023-4670 · Freerdp+8 · Freerdp+8

Pwn2Carr · Published 2023-07-28 · Updated 2025-04-10 · CVE-2023-39356

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Name of the Vulnerable Software and Affected Versions FreeRDP versions prior to 2.11.0 FreeRDP versions prior to 3.0.0-beta3

Description The issue is related to a missing offset validation in the gdi multi opaque rect function, which can lead to an Out Of Bound Read error. This occurs when the value of multi opaque rect->numRectangles is not properly validated, allowing for looping through multi opaque rect->numRectangles without boundary checks. This can result in a crash.

Recommendations For versions prior to 2.11.0, upgrade to version 2.11.0 or later. For versions prior to 3.0.0-beta3, upgrade to version 3.0.0-beta3 or later. As a temporary workaround, consider restricting access to the gdi multi opaque rect function until a patch is available. Avoid using the multi opaque rect->numRectangles variable in the affected function without proper boundary checks until the issue is resolved.

Exploit

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

ALSA-2024:2208

ALT-PU-2023-5489

ALT-PU-2023-5490

ALT-PU-2023-6067

BDU:2023-05083

CVE-2023-39356

DLA-3606-1

DLA-4053-1

GHSA-Q5V5-QHJ5-MH6M

INFSA-2024_2208

OESA-2023-1656

OPENSUSE-SU-2023_4893-1

OPENSUSE-SU-2024:13504-1

RHSA-2024:2208

RHSA-2024_2208

SUSE-SU-2023:4611-1

SUSE-SU-2023:4893-1

USN-6522-1

USN-6522-2

Affected Products

Alt Linux

Almalinux

Astra Linux

Debian

Freerdp

Linuxmint

Red Hat

Suse

Ubuntu

References · 117

• 🔥 https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-q5v5-qhj5-mh6m · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/39xxx/CVE-2023-39356.json · Exploit
• https://errata.almalinux.org/9/ALSA-2024-2208.html · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-39356 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-6522-2 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-39356 · Security Note
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/OH2ATH2BKDNKCJAU4WPPXK4SHLE3UJUV · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2024-2208.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-39356 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-40569 · Security Note
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/IHMTGKCZXJPQOR5ZD2I4GPDNP2DKRXMF · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-40188 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-39351 · Security Note
• https://ubuntu.com/security/CVE-2023-39356 · Vendor Advisory
• https://osv.dev/vulnerability/USN-6522-2 · Vendor Advisory