Out-of-bounds write in FreeRDP - CVE-2021-41159

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Main Vulnerability Database Vulnerabilities #VU57585

Out-of-bounds write in FreeRDP - CVE-2021-41159

Published: October 21, 2021


Vulnerability identifier: #VU57585
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-41159
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing /gt:rpc connections. A remote server can send specially crafted data to the client, trigger an out-of-bounds write and execute arbitrary code on the target system.


Affected software

FreeRDP
Arch Linux
Gentoo Linux
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
Red Hat Enterprise Linux Workstation
CentOS
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Desktop
SUSE Linux Enterprise Storage
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for IBM z Systems
Anolis OS
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux Server - AUS
Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support
SUSE Linux Enterprise Server
SUSE Linux Enterprise Desktop
SUSE Linux Enterprise Server for SAP Applications
SUSE Linux Enterprise Software Development Kit
SUSE Linux Enterprise Workstation Extension
SUSE Linux Enterprise High Performance Computing
openSUSE Leap
Ubuntu
openEuler
Fedora
freerdp (Red Hat package)
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
SUSE Linux Enterprise Module for Packagehub Subpackages
guacamole-server
remmina
freerdp
freerdp-libs
libwinpr
libwinpr-devel
freerdp-debugsource
freerdp-debuginfo
winpr2-devel
freerdp-devel
libwinpr2-debuginfo
libwinpr2
libfreerdp2-debuginfo
libfreerdp2
freerdp-server
freerdp-proxy
uwac0-0-devel
libuwac0-0-debuginfo
libuwac0-0
freerdp-wayland
freerdp-wayland-debuginfo
freerdp-server-debuginfo
freerdp-proxy-debuginfo
libfreerdp-client2-2 (Ubuntu package)
freerdp-help
net-misc/freerdp

How to mitigate CVE-2021-41159

Install updates from vendor's website.

FreeRDP - update to 2.4.1
freerdp (Red Hat package) - addressed in versions 2.0.0-46.rc4.el8_1.5, 2.0.0-46.rc4.el8_2.5, 2.1.1-5.el7_9, 2.2.0-6.el8_4, 2.2.0-7.el8_5
guacamole-server - update to 1.3.0-9.fc35
remmina - update to 1.4.21-1.fc35
freerdp - update to 2
freerdp - addressed in versions 2.0.0-46.rc4, 2.2.0-6, 2.2.0-7
freerdp-libs - addressed in versions 2.0.0-46.rc4, 2.2.0-6, 2.2.0-7
libwinpr - addressed in versions 2.0.0-46.rc4, 2.2.0-6, 2.2.0-7
libwinpr-devel - addressed in versions 2.0.0-46.rc4, 2.2.0-6, 2.2.0-7
freerdp-debugsource - addressed in versions 2.1.2-12.26.1, 2.1.2-150200.15.18.1, 2.4.0-150400.3.6.1
freerdp-debuginfo - addressed in versions 2.1.2-12.26.1, 2.1.2-150200.15.18.1, 2.4.0-150400.3.6.1
freerdp - addressed in versions 2.1.2-12.26.1, 2.1.2-150200.15.18.1, 2.4.0-150400.3.6.1
winpr2-devel - addressed in versions 2.1.2-12.26.1, 2.1.2-150200.15.18.1, 2.4.0-150400.3.6.1
freerdp-devel - addressed in versions 2.1.2-12.26.1, 2.1.2-150200.15.18.1, 2.4.0-150400.3.6.1
libwinpr2-debuginfo - addressed in versions 2.1.2-12.26.1, 2.1.2-150200.15.18.1, 2.4.0-150400.3.6.1
libwinpr2 - addressed in versions 2.1.2-12.26.1, 2.1.2-150200.15.18.1, 2.4.0-150400.3.6.1
libfreerdp2-debuginfo - addressed in versions 2.1.2-12.26.1, 2.1.2-150200.15.18.1, 2.4.0-150400.3.6.1
libfreerdp2 - addressed in versions 2.1.2-12.26.1, 2.1.2-150200.15.18.1, 2.4.0-150400.3.6.1
freerdp-server - addressed in versions 2.1.2-12.26.1, 2.1.2-150200.15.18.1, 2.4.0-150400.3.6.1
freerdp-proxy - addressed in versions 2.1.2-12.26.1, 2.1.2-150200.15.18.1, 2.4.0-150400.3.6.1
uwac0-0-devel - addressed in versions 2.1.2-150200.15.18.1, 2.4.0-150400.3.6.1
libuwac0-0-debuginfo - addressed in versions 2.1.2-150200.15.18.1, 2.4.0-150400.3.6.1
libuwac0-0 - addressed in versions 2.1.2-150200.15.18.1, 2.4.0-150400.3.6.1
freerdp-wayland - addressed in versions 2.1.2-150200.15.18.1, 2.4.0-150400.3.6.1
freerdp-wayland-debuginfo - addressed in versions 2.1.2-150200.15.18.1, 2.4.0-150400.3.6.1
freerdp-server-debuginfo - addressed in versions 2.1.2-150200.15.18.1, 2.4.0-150400.3.6.1
freerdp-proxy-debuginfo - addressed in versions 2.1.2-150200.15.18.1, 2.4.0-150400.3.6.1
libfreerdp-client2-2 (Ubuntu package) - addressed in versions 2.2.0+dfsg1-0ubuntu0.18.04.2, 2.2.0+dfsg1-0ubuntu0.20.04.2, 2.3.0+dfsg1-1ubuntu0.1, 2.3.0+dfsg1-2ubuntu0.1
freerdp-help - update to 2.4.1-1
freerdp - update to 2.4.1-1
freerdp-debuginfo - update to 2.4.1-1
freerdp-debugsource - update to 2.4.1-1
libwinpr-devel - update to 2.4.1-1
libwinpr - update to 2.4.1-1
freerdp-devel - update to 2.4.1-1
freerdp - update to 2.4.1-1.fc35
net-misc/freerdp - update to 2.8.1

External References

Related Security Bulletins