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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.0533 SOL00329831: Multiple NTP vulnerabilities CVE-2015-8139 and CVE-2015-8140 1 March 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: F5 products Publisher: F5 Networks Operating System: Network Appliance Impact/Access: Provide Misleading Information -- Remote/Unauthenticated Resolution: Mitigation CVE Names: CVE-2015-8140 CVE-2015-8139 Original Bulletin: https://support.f5.com/kb/en-us/solutions/public/k/00/sol00329831.html - --------------------------BEGIN INCLUDED TEXT-------------------- SOL00329831: Multiple NTP vulnerabilities CVE-2015-8139 and CVE-2015-8140 Security Advisory Original Publication Date: 02/29/2016 Vulnerability Description CVE-2015-8139 - reserved ntpq and ntpdc Disclose Origin Timestamp to Unauthenticated Clients CVE-2015-8140 - reserved ntpq protocol vulnerable to replay attacks Impact CVE-2015-8139 An attacker may exploit this vulnerability using specially crafted NTP packets to impersonate as a legitimate NTP peer. CVE-2015-8140 An attacker may be able to intercept and replay authenticated reconfiguration commands to re-establish an association to a malicious NTP server. Security Issue Status F5 Product Development has assigned ID 575629 (BIG-IP), ID 575702 (BIG-IQ), ID 575704 (Enterprise Manager), and INSTALLER-2226 (Traffix SDC) to this vulnerability, and has evaluated the currently supported releases for potential vulnerability. To determine if your release is known to be vulnerable, the components or features that are affected by the vulnerability, and for information about releases or hotfixes that address the vulnerability, refer to the following table: Product Versions known Versions known to Severity Vulnerable component to be vulnerable be not vulnerable or feature BIG-IP LTM 12.0.0 None Low NTP package 11.4.0 - 11.6.0 11.2.1 10.1.0 - 10.2.4 BIG-IP AAM 12.0.0 None Low NTP package 11.4.0 - 11.6.0 11.2.1 BIG-IP AFM 12.0.0 None Low NTP package 11.4.0 - 11.6.0 BIG-IP Analytics 12.0.0 None Low NTP package 11.4.0 - 11.6.0 11.2.1 BIG-IP APM 12.0.0 None Low NTP package 11.4.0 - 11.6.0 11.2.1 10.1.0 - 10.2.4 BIG-IP ASM 12.0.0 None Low NTP package 11.4.0 - 11.6.0 11.2.1 10.1.0 - 10.2.4 BIG-IP DNS 12.0.0 None Low NTP package BIG-IP Edge Gateway 11.2.1 10.1.0 - 10.2.4 None Low NTP package BIG-IP GTM 11.4.0 - 11.6.0 11.2.1 10.1.0 - 10.2.4 None Low NTP package BIG-IP Link Controller 12.0.0 None Low NTP package 11.4.0 - 11.6.0 11.2.1 10.1.0 - 10.2.4 BIG-IP PEM 12.0.0 None Low NTP package 11.4.0 - 11.6.0 11.2.1 BIG-IP PSM 11.4.0 - 11.4.1 None Low NTP package 11.2.1 10.1.0 - 10.2.4 BIG-IP WebAccelerator 11.2.1 10.1.0 - 10.2.4 None Low NTP package BIG-IP WOM 11.2.1 10.1.0 - 10.2.4 None Low NTP package ARX None 6.0.0 - 6.4.0 Not vulnerable None Enterprise Manager 3.0.0 - 3.1.1 None Low NTP package FirePass None 7.0.0 6.0.0 - 6.1.0 Not vulnerable None BIG-IQ Cloud 4.0.0 - 4.5.0 None Low NTP package BIG-IQ Device 4.2.0 - 4.5.0 None Low NTP package BIG-IQ Security 4.0.0 - 4.5.0 None Low NTP package BIG-IQ ADC 4.5.0 None Low NTP package BIG-IQ Centralized Management 4.6.0 None Low NTP package BIG-IQ Cloud and Orchestration 1.0.0 None Low NTP package LineRate None 2.5.0 - 2.6.1 Not vulnerable None F5 WebSafe None 1.0.0 Not vulnerable None Traffix SDC 4.0.0 - 4.4.0 3.3.2 - 3.5.1 None Low NTP package Vulnerability Recommended Actions If you are running a version listed in the Versions known to be vulnerable column, you can eliminate this vulnerability by upgrading to a version listed in the Versions known to be not vulnerable column. If the table lists only an older version than what you are currently running, or does not list a non-vulnerable version, then no upgrade candidate currently exists. F5 responds to vulnerabilities in accordance with the Severity values published in the previous table. The Severity values and other security vulnerability parameters are defined in SOL4602: Overview of the F5 security vulnerability response policy. To mitigate this vulnerability, you can perform one of the following recommended modifications to the NTP service: Configure the NTP service to use multiple time sources Configure the NTP service to restrict the use of ntpq queries with the restrict noquery directive Configure restrict network access to the NTP service Configure the NTP service to use multiple time sources To add multiple time sources for the NTP service using the Configuration Utility, perform the following procedure: Impact of procedure: Performing the following procedure should not have a negative impact on your system. 1. Log in to the Configuration utility. 2. Navigate to System > Configuration > Device > NTP. 3. In the Address box, type the IP address of the NTP server you want. 4. In the Time Server List box, click Add to include the desired NTP server. 5. Repeat step 3 and step 4 for each NTP server you want. 6. To save the changes, click Update. Configure the NTP service to restrict the use of ntpq queries with the restrict noquery directive To configure the NTP service to restrict the use of ntpq with noquery directive, perform the following procedure. Impact of procedure: Performing the following procedure should not have a negative impact on your system. 1. Log in to the tmsh utility. 2. Depending on your existing configuration, choose one of the following: If you already have an access restriction configured, but the noquery directive is disabled, use the following command syntax: modify sys ntp restrict modify { <Name> { no-query enabled } } For example, to modify an existing access restriction name called ntp_restriction to enable noquery, type the following command: modify sys ntp restrict modify { ntp_restriction { no-query enabled } } If you do not have an existing access restriction configured, use the following command syntax: modify sys ntp restrict add { <Name> { address <Network> mask <Mask> no-trap enabled no-modify enabled no-query enabled } For example, to configure an access restriction named ntp_restriction, for the 192.168.1.0/24 subnet, with notrap, nomodify, and noquery enabled, type the following command: modify sys ntp restrict add { ntp_restriction { address 192.168.1.0 mask 255.255.255.0 no-trap enabled no-modify enabled no-query enabled } 3. Save the configuration by typing the following command: save /sys config Configure restrict network access to the NTP service For information about restricting network access to the NTP service, refer to SOL13092: Overview of securing access to the BIG-IP system. Supplemental Information SOL9970: Subscribing to email notifications regarding F5 products SOL9957: Creating a custom RSS feed to view new and updated documents SOL4918: Overview of the F5 critical issue hotfix policy SOL167: Downloading software and firmware from F5 SOL13123: Managing BIG-IP product hotfixes (11.x - 12.x) SOL10025: Managing BIG-IP product hotfixes (10.x) SOL9502: BIG-IP hotfix matrix SOL15106: Managing BIG-IQ product hotfixes SOL15113: BIG-IQ hotfix matrix - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBVtT2vn6ZAP0PgtI9AQL0xQ/+LhL3XN97arAKxHRKZPYpAhJw0mpbr62X mDTx1L4cUH6Q71sS+rZlwcWRXFD5tQIXM91B/wgsYrO5OWbIuQ8klxajjPg7fsni KTQf/I6NwKSihXIcISNnHRkTePwnLgYY5FWtnZIcnZqf7ZGgNWYwKFFQyyojfsfr nVJuBqe4ILtTGjt/nveQ2z54ZsILWUp8Nf6drp6uBTvt++V3xrNckcmuBXj0gmeQ yQE5Pp6WGWB/56ieBNVSZOLtQc+Fm2UocxyEbMx6nfNn3AP8b/pOv3oxUestOWd1 FxUZ2XGU3ov76Rx6i61W2NoD8Lqzkzw0xekl36vxGabW4qvJFlAZwXoxBcHqSj72 v5GNp3zFa+5OsvVN4cfT9YIYaCZ+zx2JLG26n1gCmK7HIo5huZ0BORFmaETWUbkX 2p/r2rFfODcnyOnnJoKrpuO7szD4Ozhr+i4NDVWHoPk6NrmGwhgvQP3ay5OLsTqt 6D9P4jh42quVElOI7hSeTWB9ftHiA6WxJXWQOpsrgQc32/InlztwMxITYBKStODu BTjkY/y4+FMxWuAbVGjT/BgjAtJhn6pbQ0ROP8s4rt/yw+NjrFFESMi8UqffclK2 CmKF2LRwNBVM0d5A8AUK8czKTot9sC9/NkEvsyztfXep4NPJI0HAGD8noHEBJnPa tTFPzSm7G+I= =YCAp -----END PGP SIGNATURE-----