The rdp_rdp_process_color_pointer_pdu function in rdp/rdp_rdp.c in xrdp 0.4.1 and earlier allows remote RDP servers to have an unknown impact via input data that sets crafted values for certain length variables, leading to a buffer overflow.
https://exchange.xforce.ibmcloud.com/vulnerabilities/48094
http://openwall.com/lists/oss-security/2009/01/12/3
http://lists.opensuse.org/opensuse-security-announce/2009-02/msg00000.html