Nacionalni CERT

Ranjivost Cisco TURN (Traversal Using Relay NAT) poslužitelja

<p>-----BEGIN PGP SIGNED MESSAGE-----<br />Hash: SHA1<br /><br />Cisco Security Advisory: Cisco Meeting Server TURN Server Unauthorized Access and Information Disclosure Vulnerability<br /><br />Advisory ID: cisco-sa-20170913-cmsturn<br /><br />Revision: 1.0<br /><br />For Public Release: 2017 September 13 16:00 GMT<br /><br />Last Updated: 2017 September 13 16:00 GMT<br /><br />CVE ID(s): CVE-2017-12249<br /><br />CVSS Score v(3): 9.1 CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H<br /><br />+---------------------------------------------------------------------<br /><br />Summary<br />=======<br />A vulnerability in the Traversal Using Relay NAT (TURN) server included with Cisco Meeting Server (CMS) could allow an authenticated, remote attacker to gain unauthenticated or unauthorized access to components of or sensitive information in an affected system.<br /><br />The vulnerability is due to an incorrect default configuration of the TURN server, which could expose internal interfaces and ports on the external interface of an affected system. An attacker could exploit this vulnerability by using a TURN server to perform an unauthorized connection to a Call Bridge, a Web Bridge, or a database cluster in an affected system, depending on the deployment model and CMS services in use. A successful exploit could allow the attacker to gain unauthenticated access to a Call Bridge or database cluster in an affected system or gain unauthorized access to sensitive meeting information in an affected system. To exploit this vulnerability, the attacker must have valid credentials for the TURN server of the affected system.<br /><br />Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.<br /><br />This advisory is available at the following link:<br />https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ci... ["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ci... /><br />-----BEGIN PGP SIGNATURE-----<br /><br />iQKBBAEBAgBrBQJZuVewZBxDaXNjbyBTeXN0ZW1zIFByb2R1Y3QgU2VjdXJpdHkg<br />SW5jaWRlbnQgUmVzcG9uc2UgVGVhbSAoQ2lzY28gUFNJUlQga2V5IDIwMTYtMjAx<br />NykgPHBzaXJ0QGNpc2NvLmNvbT4ACgkQrz2APcQAkHmHwhAAq60wBxQtx9EKB1LV<br />ZDXYb1/dr5OorqyynzIpSvudFGmE+hwwQsTyIxik7ItBg3yFxI4op6q5/bfv8WyS<br />6J4a3kun0pGh7G/SXAo8qHZwytb97/2MZHqnQ1o8qrH81joUdbcqGPhtdR5zEhYf<br />46Gc8Xs/9oheBujjhwPmk/9AxwxrhIN2IphaAV3Ns/nwuttguDHYGqZwWWybQBNu<br />jwouWq2bCWcKi5+u3KAr+NVi6/HS2A9izHxRABCLFqC0cJeqOMneYYpx7VHmejm/<br />+SGx5ysbGrN5eyfRWMH5sA7vNxw3TeVCJ3SKmJ3VvDmAiOTsmTroK3UUqlS2HUZu<br />1RppMafl1m2/kvV5VLytNR5+0NuFjDBoWX/3XSpNINhNjFAluaZrEpYEbZ+vTTi9<br />CRLbH/GZmIZTfI4cpgBJ7XOsM6JOGODAIBG5t7jtLK+V8sBE2iNd3u3A6xDQGSlz<br />ODHtUDnT7Pt5yGQtez1JU/xB3ocNeSZrlwwxDqMlBi5eb40y/7kkoWx03NbmqElp<br />covvVxqjfHy2qq9XCA572c9W7+VrdAU3JbQWiJSQgQTZ2fYJh09i6pR/CEgxSkuw<br />AcHnJkhJbqIRj9PobDcDhJPhDfUvI5uxPeN/XQk7RmSWNasUhRQ/G9FB4t58EFIQ<br />laEPLyUBH8g8efXodQmaqBmR5ww=<br />=i7Bc<br />-----END PGP SIGNATURE-----<br /><br /><br />_______________________________________________<br />cust-security-announce mailing list<br />cust-security-announce@cisco.com<br />To unsubscribe, send the command "unsubscribe" in the subject of your message to cust-security-announce-leave@cisco.com</p>
Otkrivena ranjivost je posljedica nepravilne zadane konfiguracije TURN poslužitelja, a potencijalnim udaljenim neautenticiranim napadačima omogućuje neautorizirani ili neovlašteni pristup komponentama ili osjetljivim informacijama zahvaćenog sustava. Savjetuje se ažuriranje izdanim zakrpama.