Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.0949 BIG-IP APM VPN vulnerability CVE-2021-23002 18 March 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: BIG-IP APM APM Clients Publisher: F5 Networks Operating System: Network Appliance Impact/Access: Access Confidential Data -- Existing Account Reduced Security -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-23002 Original Bulletin: https://support.f5.com/csp/article/K71891773 - --------------------------BEGIN INCLUDED TEXT-------------------- K71891773: BIG-IP APM VPN vulnerability CVE-2021-23002 Original Publication Date: 11 Mar, 2021 Latest Publication Date: 18 Mar, 2021 Security Advisory Description The session ID is visible in the arguments of the f5vpn.exe command when VPN is launched from the browser on a Windows system. Addressing this issue requires both the client and server fixes. (CVE-2021-23002) Impact An attacker with privileges to view the command line of the process may be able to view the session ID. If the session ID is exposed to the attacker, the attacker can use this information to launch further attacks. Security Advisory Status F5 Product Development has assigned IDs 937637, 976925, and 973177 (BIG-IP APM) 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 or | | | |be |in | |1 |feature | | | |vulnerable| | | | | +--------------+------+----------+------------+----------+------+-------------+ | |16.x |16.0.0 - |16.0.1.1 ^ | | | | | | |16.0.1 |2,4 | | | | | +------+----------+------------+ | | | | |15.x |15.1.0 - |15.1.2.1 ^ | | | | | | |15.1.2 |2,3 | | | | | +------+----------+------------+ | | | | |14.x |14.1.0 - |14.1.4 ^2,4 | | | | | | |14.1.3 | | | |BIG-IP APM | |BIG-IP APM +------+----------+------------+Medium |6.1 |browser-based| | |13.x |13.1.0 - |13.1.3.6 ^ | | |VPN | | | |13.1.3 |2,4 | | | | | +------+----------+------------+ | | | | |12.x |12.1.0 - |None | | | | | | |12.1.5 | | | | | | +------+----------+------------+ | | | | |11.x |11.6.1 - |None | | | | | | |11.6.5 | | | | | +--------------+------+----------+------------+----------+------+-------------+ | | |7.2.1 |7.2.1.1^5 | | |BIG-IP APM | |APM Clients |7.x |7.1.9 |7.1.9.8^5 |Medium |6.1 |browser-based| | | |7.1.5 - |7.1.8.5^5 | | |VPN | | | |7.1.8 | | | | | +--------------+------+----------+------------+----------+------+-------------+ | |16.x |None |Not | | | | | | | |applicable | | | | | +------+----------+------------+ | | | | |15.x |None |Not | | | | |BIG-IP (LTM, | | |applicable | | | | |AAM, Advanced +------+----------+------------+ | | | |WAF, AFM, |14.x |None |Not | | | | |Analytics, | | |applicable |Not | | | |ASM, DDHD, +------+----------+------------+vulnerable|None |None | |DNS, FPS, GTM,|13.x |None |Not | | | | |Link | | |applicable | | | | |Controller, +------+----------+------------+ | | | |PEM, SSLO) |12.x |None |Not | | | | | | | |applicable | | | | | +------+----------+------------+ | | | | |11.x |None |Not | | | | | | | |applicable | | | | +--------------+------+----------+------------+----------+------+-------------+ | |8.x |None |Not | | | | | | | |applicable | | | | |BIG-IQ +------+----------+------------+ | | | |Centralized |7.x |None |Not |Not |None |None | |Management | | |applicable |vulnerable| | | | +------+----------+------------+ | | | | |6.x |None |Not | | | | | | | |applicable | | | | +--------------+------+----------+------------+----------+------+-------------+ |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. ^2In BIG-IP APM 13.1.0 and later, the APM Clients components can be updated independently from BIG-IP software. For more information, refer to K52547540: Updating BIG-IP Edge Client for the BIG-IP APM system. ^3BIG-IP APM 15.1.2.1 includes the server fix but does not include the client fix. After upgrading or updating to BIG-IP 15.1.2.1, you must also update APM Clients to a version listed in the Fixes introduced in column and install the fix on the client side. To install the fix on the client side, you can set Component Update to Yes in the affected Connectivity Profile OR redeploy and install the browser VPN helper application on all users' client machines. For more information, refer to K81649656: Overview of APM Clients update on BIG-IP APM. ^4BIG-IP APM 13.1.3.6, 14.1.4 and 16.0.1.1 are shipped with APM Clients version 7.1.8.5, which includes the client fix. You need to install this fix on the client side. You can do so by setting Component Update to Yes in the affected Connectivity Profile or redeploy and install the browser VPN helper application on all users' client machines. For more information, refer to K81649656: Overview of APM Clients update on BIG-IP APM ^5When you update APM Clients to 7.1.8.5, 7.1.9.8, or 7.2.1.1 listed in the fixed column, you may encounter the known issue described in K25173042: Browser network access VPN clients may not establish the first time after an APM Clients auto update and K39454429: Browser network access VPN clients fail to establish a VPN connection. 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 use the BIG-IP Edge Client for VPN access instead of the browser-based VPN. Acknowledgements F5 acknowledges Raeez Abdulla of CodeGreen Systems, UAE for bringing this issue to our attention and for following the highest standards of coordinated disclosure. Supplemental Information o K13757: BIG-IP Edge Client version matrix o K41942608: Overview of security advisory articles o K4602: Overview of the F5 security vulnerability response policy o K4918: Overview of the F5 critical issue hotfix policy o K9502: BIG-IP hotfix and point release matrix o K13123: Managing BIG-IP product hotfixes (11.x - 16.x) o K48955220: Installing an OPSWAT Endpoint Security update on BIG-IP APM systems (11.4.x and later) o K167: Downloading software and firmware from F5 o K9970: Subscribing to email notifications regarding F5 products o K9957: Creating a custom RSS feed to view new and updated documents - --------------------------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: https://www.auscert.org.au/bulletins/ =========================================================================== 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 iQIVAwUBYFKYd+NLKJtyKPYoAQielhAAkyOCAyj9fWKUV5e8P+umI5LbDWY1DMdm FDL/pB/NXsCUMKZYG/JPc38+lnFasmFYk3tMse+IbZXpCLvFHgeibpJvdTHIhc1r 160kqi3vuzqk7Z9GT6ChMhjOyfW9tMFMTAyUuSWxZoo7lvUCPFu3uXHFsv2i/81P THJtLuBxQj0ech4NDKW/Gp+LH6JXr0K6hOqDCHSuuayWy4pMUWJBas5L6adWhngA +7TCyt9vRSYCevJq9CwGdT0mDs1Jzs7mn5whe/jXfV+AOBaG/6tRqFIOhdvwDdKb +yOS6hwtJLvaLvrRGnmi1uQwV3nji2U2xvIIvb1/ikKy0NdcKjv1EdBIzpLbX0yb BylGoDrPrtK1NZasC7NqO4pFc4E7Mc05fCq5rizNF89Gx0QpORNq7wpqz+G1tOtS 5Hg5f5P2A3O0slmxU1M6gTgE78qYx7RasjROsPuZHmqVETNMnCcjvR0rE5p9lPkR NqYchmlfb0j0XRrEGyFQNdT2/ViJqnF53FokTwUSFVawUgEXJPhp1YT+xErQ/IoS CGg9jAJEvOdD4yX4hlpIpmzbFK5JmsG6xV04Qe+V5kHBazjVAx+2otbkWQhm6o1U xxcf07BhIWJb4qExrOM5NU/avXwGMllCWa/+sBB5/2YNt0ymrSjuRMRLOwOreb8N U3kzNCShWys= =YiMM -----END PGP SIGNATURE-----