MGASA-2021-0522

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MGASA-2021-0522

Summary: Updated freerdp packages fix security vulnerability

Details: 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)

References: https://advisories.mageia.org/MGASA-2021-0522.html, https://bugs.mageia.org/show_bug.cgi?id=29654, https://access.redhat.com/errata/RHSA-2021:4622