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FreeRDP before 3.29.0 (affected versions <= 3.28.0) does not validate CRLF and control characters in the server-controlled RDP redirection TargetNetAddress field. This value is copied into the client's ServerHostname and, when the client connects through an HTTP proxy, is written directly into the proxy CONNECT request line and Host header by http_proxy_connect() without filtering. A malicious or compromised RDP server can send a crafted redirection PDU containing embedded control characters to inject arbitrary headers/requests into the HTTP proxy CONNECT request.
This issue has been addressed in the following products: Red Hat Enterprise Linux 10 Via RHSA-2026:54486 https://access.redhat.com/errata/RHSA-2026:54486
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2026:54485 https://access.redhat.com/errata/RHSA-2026:54485
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2026:54487 https://access.redhat.com/errata/RHSA-2026:54487
This issue has been addressed in the following products: Red Hat Enterprise Linux 10.0 Extended Update Support Via RHSA-2026:58711 https://access.redhat.com/errata/RHSA-2026:58711
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Via RHSA-2026:58712 https://access.redhat.com/errata/RHSA-2026:58712
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Via RHSA-2026:58710 https://access.redhat.com/errata/RHSA-2026:58710
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.6 Extended Update Support Via RHSA-2026:58713 https://access.redhat.com/errata/RHSA-2026:58713
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Via RHSA-2026:60173 https://access.redhat.com/errata/RHSA-2026:60173
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Via RHSA-2026:61250 https://access.redhat.com/errata/RHSA-2026:61250
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat Enterprise Linux 8.8 Telecommunications Update Service Via RHSA-2026:61251 https://access.redhat.com/errata/RHSA-2026:61251
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Extended Lifecycle Support Via RHSA-2026:62401 https://access.redhat.com/errata/RHSA-2026:62401