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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.2329.4 K40378764:F5 tmsh vulnerability CVE-2019-6642 28 November 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: F5 products Publisher: F5 Networks Operating System: Network Appliance Impact/Access: Root Compromise -- Existing Account Resolution: Mitigation CVE Names: CVE-2019-6642 Original Bulletin: https://support.f5.com/csp/article/K40378764 Revision History: November 28 2019: v15.x branch now fixed with 15.0.1.1 September 25 2019: Updated affected versions including a fix for the 14.x branch August 12 2019: Vendor advises that fixes are available for some versions June 28 2019: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- K40378764: F5 tmsh vulnerability CVE-2019-6642 Original Publication Date: 28 Jun, 2019 Latest Publication Date: 27 Nov, 2019 Security Advisory Description Authenticated users with the ability to upload files (via scp, for example) can escalate their privileges to allow root shell access from within the TMOS Shell (tmsh) interface. The tmsh interface allows users to execute a secondary program via tools like sftp or scp. (CVE-2019-6642) Impact BIG-IP, BIG-IQ, F5 iWorkflow, and Enterprise Manager The affected systems are incidentally protected against direct access to the Advanced Shell (bash); however, users who can upload an executable file (or script) can bypass this protection. Traffix SDC There is no impact for this product as it is not affected by this vulnerability. Security Advisory Status F5 Product Development has assigned ID 771873 (BIG-IP) and ID 772713 (BIG-IQ, F5 iWorkflow, and Enterprise Manager) to this vulnerability. To determine if your product and version have been evaluated for this vulnerability, refer to the Applies to (see versions) box. 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, point releases, or hotfixes that address the vulnerability, refer to the following table. For more information about security advisory versioning, refer to K51812227: Understanding Security Advisory versioning. +-------------------+------+----------+----------+----------+------+----------+ | | |Versions |Fixes | |CVSSv3|Vulnerable| |Product |Branch|known to |introduced|Severity |score^|component | | | |be |in | |1 |or feature| | | |vulnerable| | | | | +-------------------+------+----------+----------+----------+------+----------+ | |15.x |15.0.0 - |15.0.1.1 | | | | | | |15.0.1 | | | | | | +------+----------+----------+ | | | |BIG-IP (LTM, AAM, |14.x |14.0.0 - |14.1.2.1 | | | | |AFM, Analytics, | |14.1.2 |14.0.1.1 | | | | |APM, ASM, DNS, Edge+------+----------+----------+ | | | |Gateway, FPS, GTM, |13.x |13.0.0 - |13.1.3 |High |7.8 |tmsh bash | |Link Controller, | |13.1.2 | | | | | |PEM, +------+----------+----------+ | | | |WebAccelerator) |12.x |12.1.0 - |12.1.5 | | | | | | |12.1.4 | | | | | | +------+----------+----------+ | | | | |11.x |11.5.2 - |11.6.5.1 | | | | | | |11.6.5 | | | | | +-------------------+------+----------+----------+----------+------+----------+ |Enterprise Manager |3.x |3.1.1 |None |High |7.8 |tmsh bash | +-------------------+------+----------+----------+----------+------+----------+ | |6.x |6.0.0 - |None | | | | |BIG-IQ Centralized | |6.1.0 | | | | | |Management +------+----------+----------+High |7.8 |tmsh bash | | |5.x |5.1.0 - |None | | | | | | |5.4.0 | | | | | +-------------------+------+----------+----------+----------+------+----------+ |F5 iWorkflow |2.x |2.3.0 |None |High |7.8 |tmsh bash | +-------------------+------+----------+----------+----------+------+----------+ |Traffix SDC |5.x |None |Not |Not |None |None | | | | |applicable|vulnerable| | | +-------------------+------+----------+----------+----------+------+----------+ ^1The CVSSv3 score link takes you to a resource outside of AskF5, and it is possible that the document may be removed without our knowledge. Security Advisory 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 Fixes introduced in 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. Mitigation To mitigate this vulnerability, you can disable the TMOS Shell (tmsh) access on all user accounts associated with the Resource Administrator role. For more information about disabling tmsh access, refer to K12029: Accessing the TMOS Shell. Acknowledgements F5 would like to acknowledge Lukasz Juszczyk and Robert Podsiadlo of ING Tech Poland for bringing this issue to our attention, and for following the highest standards of responsible disclosure. - --------------------------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. 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