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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.3260.2 SCP vulnerability CVE-2020-15778 6 January 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: BIG-IP BIG-IQ Centralized Management Traffix SDC Publisher: F5 Networks Operating System: Network Appliance UNIX variants (UNIX, Linux, OSX) Windows Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2020-15778 Original Bulletin: https://support.f5.com/csp/article/K04305530 Comment: This advisory references vulnerabilities in products which run on platforms other than F5 Networks. It is recommended that administrators running OpenSSH check for an updated version of the software for their operating system. Revision History: January 6 2021: Additional vulnerable versions added by vendor September 24 2020: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- K04305530: SCP vulnerability CVE-2020-15778 Original Publication Date: 24 Sep, 2020 Latest Publication Date: 06 Jan, 2021 Security Advisory Description scp in OpenSSH through 8.3p1 allows command injection in scp.c remote function, as demonstrated by backtick characters in the destination argument. NOTE: the vendor reportedly has stated that they intentionally omit validation of "anomalous argument transfers" because that could "stand a great chance of breaking existing workflows." (CVE-2020-15778) Impact This flaw is found in the SCP program shipped with the openssh-clients package. An attacker having the ability to SCP files to a remote server could run arbitrary commands on the remote server by including a command as a part of the filename being copied on the server. This command runs with the user permissions used to copy the files on the remote server. The most serious threats from this vulnerability are to data confidentiality and integrity, as well as to system availability. Security Advisory Status F5 Product Development has assigned ID 937433 (BIG-IP), ID 937037 (BIG-IQ) and CPF-25210 (Traffix) 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| | | | | +---------------------+------+----------+----------+--------+------+----------+ | |16.x |16.0.0 - |None | | | | | | |16.0.1 | | | | | | +------+----------+----------+ | | | | |15.x |15.1.0 - |None | | | | | | |15.1.2 | | | | | |BIG-IP (LTM, AAM, +------+----------+----------+ | | | |Advanced WAF, AFM, |14.x |14.1.0 - |None | | |SCP (a | |Analytics, APM, ASM, | |14.1.3 | | | |component | |DDHD, DNS, FPS, GTM, +------+----------+----------+High |7.8 |of | |Link Controller, PEM,|13.x |13.1.0 - |None | | |OpenSSH) | |SSLO) | |13.1.3 | | | | | | +------+----------+----------+ | | | | |12.x |12.1.0 - |None | | | | | | |12.1.5 | | | | | | +------+----------+----------+ | | | | |11.x |11.6.1 - |None | | | | | | |11.6.5 | | | | | +---------------------+------+----------+----------+--------+------+----------+ | |7.x |7.0.0 - |None | | | | | | |7.1.0 | | | |SCP (a | |BIG-IQ Centralized +------+----------+----------+ | |component | |Management |6.x |6.0.0 - |None |High |7.8 |of | | | |6.1.0 | | | |OpenSSH) | | +------+----------+----------+ | | | | |5.x |5.4.0 |None | | | | +---------------------+------+----------+----------+--------+------+----------+ | | | | | | |SCP (a | |Traffix SDC |5.x |5.1.0 |None |High |7.8 |component | | | | | | | |of | | | | | | | |OpenSSH) | +---------------------+------+----------+----------+--------+------+----------+ ^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 restrict SCP access to the BIG-IP Configuration utility (Traffic Management User Interface/TMUI) to only trusted administrators through local or network firewalls and block SCP access by changing the Port Lockdown setting to Allow None for each self IP in the system. If you must open any ports, you should use the Allow Custom option, taking care to disallow SSH access. For more information, refer to the following articles: o K13092: Overview of securing access to the BIG-IP system o K13309: Restricting access to the Configuration utility by source IP address (11.x - 16.x) o K17333: Overview of port lockdown behavior (12.x - 16.x) Supplemental Information 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 K15106: Managing BIG-IQ product hotfixes o K15113: BIG-IQ hotfix and point release matrix 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). 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