-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Cisco Security Advisory: Cisco IOS and IOS XE Software Cluster Management Protocol Remote Code Execution Vulnerability Advisory ID: cisco-sa-20170317-cmp Revision: 1.0 For Public Release: 2017 March 17 16:00 GMT Last Updated: 2017 March 17 16:00 GMT CVE ID(s): CVE-2017-3881 CVSS Score v(3): 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H +--------------------------------------------------------------------- Summary ======= A vulnerability in the Cisco Cluster Management Protocol (CMP) processing code in Cisco IOS and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a reload of an affected device or remotely execute code with elevated privileges. The Cluster Management Protocol utilizes Telnet internally as a signaling and command protocol between cluster members. The vulnerability is due to the combination of two factors: The failure to restrict the use of CMP-specific Telnet options only to internal, local communications between cluster members and instead accept and process such options over any Telnet connection to an affected device, and The incorrect processing of malformed CMP-specific Telnet options. An attacker could exploit this vulnerability by sending malformed CMP-specific Telnet options while establishing a Telnet session with an affected Cisco device configured to accept Telnet connections. An exploit could allow an attacker to execute arbitrary code and obtain full control of the device or cause a reload of the affected device. Cisco will release software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170317-cmp ["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170317-cmp";] -----BEGIN PGP SIGNATURE----- iQKBBAEBAgBrBQJYzAjfZBxDaXNjbyBTeXN0ZW1zIFByb2R1Y3QgU2VjdXJpdHkg SW5jaWRlbnQgUmVzcG9uc2UgVGVhbSAoQ2lzY28gUFNJUlQga2V5IDIwMTYtMjAx NykgPHBzaXJ0QGNpc2NvLmNvbT4ACgkQrz2APcQAkHm3jRAAzLR1b6oQbXCkv0yQ GpiGyo0l97V74L+99IvzJzibQrNr/7oFNVc0Sm0SWtGJwhBdIFWKKp7tpfxLFUYw QpgpmOQHfu70kajINv5hshpKReIT2lnUhmAiK0VQzxp8QY/3WboSTjEYLOTmFHHh xb3dNWmvGYiT9tuSvQ70AkMnl2EfU+P+pkucjcku4Vi5Jri7BIIIPjz1by16Juh+ tIB5elmrFOFF/WGRERLo/a3anNlnoszoJxu+m57uS8CYICTnqJKeDEinpm64j0IB 7dWi1qqDTx9973zsmcqUZqeY9kSwierDJW5cii49GrOFOHUeJ9eWCOogEnE1+U4G iz7cJHsQ4qqBF39PBTMlxtY6xjhgGJDkRf3dzJBONH9EfoTpQOFMlO9220/2wlMe SquIU+SY31pW/xHcRfD8NoALZQ5EqrOkbbRXPGe/LwSUcXiFSBL0iMaE/jOPIRRs q6c7lbQr2kay0hTUMovhCvkVUlIC4eJAjwES3vau0EynKlumoYUb2Z7kSAq9QRqU vjHX1Iq+wrh+pM/+GFpx12yJzaDtIrBQSNtB/Jf8p0kNqlja/4Z90DDtwTCTaalR 7hGFyGWo3X3dPBxEL4OcASAaf2uC/J0ozprd0xCS8rsiMfn3rBYWtE6taK88njda 6UdaqFK+zmUBK8rQV0Lu6mOFpOo= =Ql/1 -----END PGP SIGNATURE-----
