CVE-2021-41159

A Remote Desktop Protocol Implementation

Security Fix(es):

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. All FreeRDP clients prior to version 2.4.1 using gateway connections fail to validate input data. A malicious gateway might allow client memory to be written out of bounds. This issue has been resolved in version 2.4.1. If you are unable to update then use /gt:http rather than /gt:rdp connections if possible or use a direct connection without a gateway.(CVE-2021-41159)

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.

Security Fix(es):

• freerdp: improper client input validation for gateway connections allows to overwrite memory (CVE-2021-41159)

• freerdp: improper region checks in all clients allow out of bound write to memory (CVE-2021-41160)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. All FreeRDP clients prior to version 2.4.1 using gateway connections (/gt:rpc) fail to validate input data. A malicious gateway might allow client memory to be written out of bounds. This issue has been resolved in version 2.4.1. If you are unable to update then use /gt:http rather than /gt:rdp connections if possible or use a direct connection without a gateway.

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.

Security Fix(es):

• freerdp: improper client input validation for gateway connections allows to overwrite memory (CVE-2021-41159)

• freerdp: improper region checks in all clients allow out of bound write to memory (CVE-2021-41160)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

• CVE-2021-41159: fix client out of memory

All FreeRDP clients prior to version 2.4.1 using gateway connections ('/gt:rpc') fail to validate input data. A malicious gateway might allow client memory to be written out of bounds. This issue has been resolved in version 2.4.1. If you are unable to update then use /gt:http rather than /gt:rdp connections if possible or use a direct connection without a gateway. (CVE-2021-41159)

In affected versions a malicious server might trigger out of bound writes in a connected client. Connections using GDI or SurfaceCommands to send graphics updates to the client might send 0 width/height or out of bound rectangles to trigger out of bound writes. With 0 width or heigth the memory allocation will be 0 but the missing bounds checks allow writing to the pointer at this (not allocated) region. This issue has been patched in FreeRDP 2.4.1. (CVE-2021-41160)

These are all security issues fixed in the freerdp-2.4.1-1.1 package on the GA media of openSUSE Tumbleweed.

This update for freerdp fixes the following issues:

• CVE-2021-41159: Fixed improper validation of client input (bsc#1191895).
• CVE-2022-41160: Fixed improper region checks (bsc#1191895).

This update for freerdp fixes the following issues:

• CVE-2021-41159: Fixed improper validation of client input (bsc#1191895).
• CVE-2022-41160: Fixed improper region checks (bsc#1191895).

This update for freerdp fixes the following issues:

• Fixed two input validation issues (bsc#1191895):
  • CVE-2021-41159: Fixed an improper validation of client input for gateway connections.
  • CVE-2021-41160: Fixed improper region checks that could lead to memory corruption.

It was discovered that FreeRDP incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code or cause a crash. (CVE-2021-41159)

It was discovered that FreeRDP incorrectly handled certain connections. An attacker could possibly use this issue to execute arbitrary code or cause a crash. (CVE-2021-41160)