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Vulnerability · Published Aug 31, 2023 · Assigned by GitHub_M

CVE-2023-39351FreeRDP Null Pointer Dereference leading denial of service

Medium 5.3

In plain English

A medium-severity null pointer dereference in FreeRDP from FreeRDP. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 75% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)1.6%top 24.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Affected versions of FreeRDP are subject to a Null Pointer Dereference leading a crash in the RemoteFX (rfx) handling. Inside the `rfx_process_message_tileset` function, the program allocates tiles using `rfx_allocate_tiles` for the number of numTiles. If the initialization process of tiles is not completed for various reasons, tiles will have a NULL pointer. Which may be accessed in further processing and would cause a program 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:9freerdp2:2.11.2-1.el9ALSA-2024:2208
AlmaLinux:9freerdp-devel2:2.11.2-1.el9ALSA-2024:2208
AlmaLinux:9freerdp-libs2:2.11.2-1.el9ALSA-2024:2208
AlmaLinux:9libwinpr2:2.11.2-1.el9ALSA-2024:2208
AlmaLinux:9libwinpr-devel2:2.11.2-1.el9ALSA-2024:2208
Debian:12freerdp22.11.7+dfsg1-6~deb12u1DEBIAN-CVE-2023-39351
Ubuntu:22.04:LTSfreerdp22.6.1+dfsg1-3ubuntu2.4USN-6401-1
Ubuntu:22.04:LTSfreerdp22.6.1+dfsg1-3ubuntu2.4UBUNTU-CVE-2023-39351

Affected products (as reported)

VendorProductVersions
FreeRDP FreeRDP < 2.11.0>= 3.0.0-beta1, < 3.0.0-beta3

Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References