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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.2133 SOL17113: OpenSSH vulnerability CVE-2015-5600 17 August 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: F5 products Publisher: F5 Networks Operating System: Network Appliance Impact/Access: Denial of Service -- Remote/Unauthenticated Unauthorised Access -- Remote/Unauthenticated Resolution: Mitigation CVE Names: CVE-2015-5600 Reference: ESB-2015.2113 ESB-2015.1975.2 Original Bulletin: https://support.f5.com/kb/en-us/solutions/public/17000/100/sol17113.html - --------------------------BEGIN INCLUDED TEXT-------------------- SOL17113: OpenSSH vulnerability CVE-2015-5600 Security Advisory Original Publication Date: 08/14/2015 Description The kbdint_next_device function in auth2-chall.c in sshd in OpenSSH through 6.9 does not properly restrict the processing of keyboard-interactive devices within a single connection, which makes it easier for remote attackers to conduct brute-force attacks or cause a denial of service (CPU consumption) via a long and duplicative list in the ssh -oKbdInteractiveDevices option, as demonstrated by a modified client that provides a different password for each pam element on this list. (CVE-2015-5600) Impact Remote attackers may be able to conduct brute-force attacks or cause a denial-of-service (DoS) by way of the ssh -oKbdInteractiveDevices option. Status F5 Product Development has assigned ID 534633 (BIG-IP), ID 535886 (BIG-IQ), ID 535889 (Enterprise Manager), ID 431179 (ARX), and LRS-59845 (LineRate), 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 Severity Vulnerable component or feature BIG-IP LTM 11.0.0 - 11.6.0 10.1.0 - 10.2.4 None Medium sshd BIG-IP AAM 11.4.0 - 11.6.0 None Medium sshd BIG-IP AFM 11.3.0 - 11.6.0 None Medium sshd BIG-IP Analytics 11.0.0 - 11.6.0 None Medium sshd BIG-IP APM 11.0.0 - 11.6.0 10.1.0 - 10.2.4 None Medium sshd BIG-IP ASM 11.0.0 - 11.6.0 10.1.0 - 10.2.4 None Medium sshd BIG-IP Edge Gateway 11.0.0 - 11.3.0 10.1.0 - 10.2.4 None Medium sshd BIG-IP GTM 11.0.0 - 11.6.0 10.1.0 - 10.2.4 None Medium sshd BIG-IP Link Controller 11.0.0 - 11.6.0 10.1.0 - 10.2.4 None Medium sshd BIG-IP PEM 11.3.0 - 11.6.0 None Medium sshd BIG-IP PSM 11.0.0 - 11.4.1 10.1.0 - 10.2.4 None Medium sshd BIG-IP WebAccelerator 11.0.0 - 11.3.0 10.1.0 - 10.2.4 None Medium sshd BIG-IP WOM 11.0.0 - 11.3.0 10.1.0 - 10.2.4 None Medium sshd ARX 6.0.0 - 6.4.0 None Medium sshd Enterprise Manager 3.0.0 - 3.1.1 2.1.0 - 2.3.0 None Medium sshd FirePass None 7.0.0 6.0.0 - 6.1.0 Not vulnerable None BIG-IQ Cloud 4.0.0 - 4.5.0 None Medium sshd BIG-IQ Device 4.2.0 - 4.5.0 None Medium sshd BIG-IQ Security 4.0.0 - 4.5.0 None Medium sshd BIG-IQ ADC 4.5.0 None Medium sshd LineRate 2.5.0 - 2.6.1 None High sshd F5 WebSafe None 1.0.0 Not vulnerable None Traffix SDC None 4.0.0 - 4.1.0 3.3.2 - 3.5.1 Not vulnerable None Note: As of February 17, 2015, AskF5 Security Advisory articles include the Severity value. Security Advisory articles published before this date do not list a Severity value. 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 listed version is older than the version you are currently running, or if the table does not list any version in the column, 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 should permit management access to F5 products only over a secure network and limit shell access to trusted users. For more information, refer to SOL13309: Restricting access to the Configuration utility by source IP address (11.x) and SOL13092: Overview of securing access to the BIG-IP system. In addition, secure the BIG-IP system from unwanted connection attempts by controlling the level of access to each self IP address defined on the system. For more information, refer to SOL13250: Overview of port lockdown behavior (10.x - 11.x). Supplemental Information SOL11719: Mitigating risk from SSH brute force login attacks 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) SOL10942: Installing OPSWAT hotfixes on BIG-IP APM systems - --------------------------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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