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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.2325 sol15882: TLS1.x padding vulnerability CVE-2014-8730 Security Advisory 9 December 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: F5 products Publisher: F5 Networks Operating System: Network Appliance Impact/Access: Access Privileged Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2014-8730 Original Bulletin: https://support.f5.com/kb/en-us/solutions/public/15000/800/sol15882.html - --------------------------BEGIN INCLUDED TEXT-------------------- sol15882: TLS1.x padding vulnerability CVE-2014-8730 Security Advisory Original Publication Date: 12/08/2014 Updated Date: 12/08/2014 Description Incorrect TLS padding may be accepted when terminating TLS 1.x CBC cipher connections. (CVE-2014-8730) Impact Attackers may be able to calculate the plaintext of secure connections. Status F5 Product Development has assigned ID 451218, ID 450804, ID 454465 (BIG-IP), ID 494328, ID 494330, ID 494331 (BIG-IQ), and ID 494339, ID 494341, ID 494342 (Enterprise Manager) 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 to be vulnerable Versions known to be not vulnerable Vulnerable component or feature BIG-IP LTM 11.0.0 - 11.5.1 11.6.0 SSL profiles 10.0.0 - 10.2.4 11.5.1 HF6 11.5.0 HF6 11.4.1 HF6 11.4.0 HF9 11.2.1 HF13 10.2.4 HF10 BIG-IP AAM 11.4.0 - 11.5.1 11.6.0 SSL profiles 11.5.1 HF6 11.5.0 HF6 11.4.1 HF6 11.4.0 HF9 BIG-IP AFM 11.3.0 - 11.5.1 11.6.0 SSL profiles 11.5.1 HF6 11.5.0 HF6 11.4.1 HF6 11.4.0 HF9 BIG-IP 11.0.0 - 11.5.1 11.5.1 HF6 SSL profiles Analytics 11.6.0 11.5.0 HF6 11.4.1 HF6 11.4.0 HF9 11.2.1 HF13 BIG-IP APM 11.0.0 - 11.5.1 11.6.0 SSL profiles 10.1.0 - 10.2.4 11.5.1 HF6 11.5.0 HF6 11.4.1 HF6 11.4.0 HF9 11.2.1 HF13 10.2.4 HF10 BIG-IP ASM 11.0.0 - 11.5.1 11.6.0 SSL profiles 10.0.0 - 10.2.4 11.5.1 HF6 11.5.0 HF6 11.4.1 HF6 11.4.0 HF9 11.2.1 HF13 10.2.4 HF10 BIG-IP 11.0.0 - 11.3.0 11.2.1 HF13 SSL profiles Edge Gateway 10.1.0 - 10.2.4 10.2.4 HF10 BIG-IP GTM* None 11.0.0 - 11.6.0 None 10.0.0 - 10.2.4 BIG-IP Link None 11.0.0 - 11.6.0 None Controller* 10.0.0 - 10.2.4 BIG-IP PEM 11.3.0 - 11.6.0 11.6.0 HF3 SSL profiles 11.5.1 HF6 11.5.0 HF6 11.4.1 HF6 11.4.0 HF9 BIG-IP PSM 11.0.0 - 11.4.1 11.4.1 HF6 SSL profiles 10.0.0 - 10.2.4 11.4.0 HF9 11.2.1 HF13 10.2.4 HF10 BIG-IP 11.0.0 - 11.3.0 11.2.1 HF13 SSL profiles WebAccelerator 10.0.0 - 10.2.4 10.2.4 HF10 BIG-IP WOM 11.0.0 - 11.3.0 11.4.1 HF6 SSL profiles 10.0.0 - 10.2.4 11.4.0 HF9 11.2.1 HF13 10.2.4 HF10 ARX None 6.0.0 - 6.4.0 None Enterprise None 3.0.0 - 3.1.1 None Manager* 2.1.0 - 2.3.0 FirePass None 7.0.0 None 6.0.0 - 6.1.0 BIG-IQ Cloud 4.0.0 - 4.4.0 None REST API BIG-IQ Device 4.2.0 - 4.4.0 None REST API BIG-IQ Security 4.0.0 - 4.4.0 None REST API LineRate None 2.2.0 - 2.5.0 None 1.6.0 - 1.6.4 *The noted products contain vulnerable code but do not expose SSL profiles and are therefore not vulnerable. Recommended action If the previous table lists a version in the Versions known to be not vulnerable column, you can eliminate this vulnerability by upgrading to the listed version. If the table does not list any version in the column, then no upgrade candidate currently exists. To mitigate this vulnerability, you can configure a custom cipher string for the SSL profile and associate the profile with the virtual servers. To do so, perform one of the following procedures: BIG-IP SSL profiles To mitigate this vulnerability, you can create a custom cipher string for the SSL profile that uses RC4 or AES-GCM ciphers. For details about how to add this, refer to the following procedures: BIG-IP 11.5.0 and later In BIG-IP 11.5.0 and later, you can create a custom cipher string for the SSL profile using the AES-GCM:RC4-SHA ciphers. To do so, perform the following procedure: Impact of procedure: An SSL virtual server configured to use this SSL profile will use only TLS 1.2-compatible ciphers or RC4-SHA ciphers. Clients who do not support TLS 1.2 may not be able to connect, or will connect using an RC4-SHA cipher. RC4 ciphers are not FIPS compliant. 1. Log in to the Traffic Management Shell (tmsh) by typing the following command: tmsh 2. Create a custom SSL profile that specifies the AES-GCM:RC4-SHA ciphers by using the following syntax: create /ltm profile <client-ssl / server-ssl> <profile_name> ciphers !SSLv3:AES-GCM:RC4-SHA For example, the following command creates a custom client SSL profile called TLS-Padding: create /ltm profile client-ssl TLS-Padding ciphers !SSLv3:AES-GCM:RC4-SHA 3. Save the configuration by typing the following command: save /sys config 4. Associate the SSL profile with the virtual servers. BIG-IP 10.x - 11.4.1 In BIG-IP 10.x - 11.4.1, you can create a custom cipher string for the SSL profile using the RC4-SHA ciphers. To do so, perform the following procedure: Impact of procedure: Clients that do not support the RC4-SHA cipher will fail to establish a connection to the virtual server. RC4 ciphers are not FIPS compliant. 1. Log in to tmsh by typing the following command: tmsh 2. Create a custom SSL profile that specifies the RC4-SHA ciphers by using the following syntax: create /ltm profile <client-ssl / server-ssl> <profile_name> ciphers !SSLv3:RC4-SHA For example, the following command creates a custom client SSL profile called TLS-Padding: create /ltm profile client-ssl TLS-Padding ciphers !SSLv3:RC4-SHA 3. Save the configuration by typing the following command: save /sys config 4. Associate the SSL profile with the virtual servers. Supplemental Information CVE-2014-8730 Padding issue SOL9970: Subscribing to email notifications regarding F5 products SOL9957: Creating a custom RSS feed to view new and updated documents SOL4602: Overview of the F5 security vulnerability response policy SOL4918: Overview of the F5 critical issue hotfix policy SOL167: Downloading software and firmware from F5 SOL13123: Managing BIG-IP product hotfixes (11.x) SOL10025: Managing BIG-IP product hotfixes (10.x) SOL9502: BIG-IP hotfix matrix SOL13171: Configuring the cipher strength for SSL profiles (11.x) SOL7815: Configuring the cipher strength for SSL profiles (9.x - 10.x) - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. 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). 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