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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2022.2166.2 K82034427: BIG-IP FTP profile vulnerability CVE-2022-26130 12 May 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: BIG-IP Publisher: F5 Networks Operating System: Network Appliance Resolution: Patch/Upgrade CVE Names: CVE-2022-26130 Original Bulletin: https://support.f5.com/csp/article/K82034427 Comment: CVSS (Max): 5.3 CVE-2022-26130 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L) CVSS Source: F5 Networks Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Revision History: May 12 2022: Vendor updated the mitigations May 7 2022: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- K82034427: BIG-IP FTP profile vulnerability CVE-2022-26130 Original Publication Date: 04 May, 2022 Latest Publication Date: 11 May, 2022 Security Advisory Description When an Active mode-enabled FTP profile is configured on a virtual server, undisclosed traffic can cause the virtual server to stop processing active FTP data channel connections. (CVE-2022-26130) Impact Traffic is disrupted for active FTP data channel connections. This vulnerability allows a remote unauthenticated attacker to cause a denial-of-service (DoS) on the BIG-IP system, specific to the impacted virtual server. There is no control plane exposure; this is a data plane issue only. Security Advisory Status F5 Product Development has assigned ID 951257 (BIG-IP) to this vulnerability. This issue has been classified as CWE-754: Improper Check for Unusual or Exceptional Conditions. 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. Note: After a fix is introduced for a given minor branch, that fix applies to all subsequent maintenance and point releases for that branch, and no additional fixes for that branch will be listed in the table. For example, when a fix is introduced in 14.1.2.3, the fix also applies to 14.1.2.4, and all later 14.1.x releases (14.1.3.x., 14.1.4.x). For more information, refer to K51812227: Understanding security advisory versioning. Additionally, software versions preceding those listed in the Applies to (see versions) box of this article have reached the End of Technical Support (EoTS) phase of their lifecycle and are no longer evaluated for security issues. For more information, refer to the Security hotfixes section of K4602: Overview of the F5 security vulnerability response policy. +-----------+------+-----------+----------+----------+------+-----------------+ | | |Versions |Fixes | |CVSSv3|Vulnerable | |Product |Branch|known to be|introduced|Severity |score^|component or | | | |vulnerable |in | |1 |feature | +-----------+------+-----------+----------+----------+------+-----------------+ | |17.x |None |17.0.0 | | | | | +------+-----------+----------+ | | | | |16.x |16.1.0 - |16.1.2.2 | | | | | | |16.1.2 | | | | | | +------+-----------+----------+ | | | | |15.x |15.1.0 - |15.1.5.1 | | | | | | |15.1.5 | | | | | | +------+-----------+----------+ | |Virtual Server | |BIG-IP (all|14.x |14.1.0 - |14.1.4.6 | | |with Active mode | |modules) | |14.1.4 | |Medium |5.3 |enabled FTP | | +------+-----------+----------+ | |profile | | |13.x |13.1.0 - |13.1.5 | | | | | | |13.1.4 | | | | | | +------+-----------+----------+ | | | | |12.x |None |Not | | | | | | | |applicable| | | | | +------+-----------+----------+ | | | | |11.x |None |Not | | | | | | | |applicable| | | | +-----------+------+-----------+----------+----------+------+-----------------+ | |8.x |None |Not | | | | |BIG-IQ | | |applicable|Not | | | |Centralized+------+-----------+----------+vulnerable|None |None | |Management |7.x |None |Not | | | | | | | |applicable| | | | +-----------+------+-----------+----------+----------+------+-----------------+ |F5OS-A |1.x |None |Not |Not |None |None | | | | |applicable|vulnerable| | | +-----------+------+-----------+----------+----------+------+-----------------+ |F5OS-C |1.x |None |Not |Not |None |None | | | | |applicable|vulnerable| | | +-----------+------+-----------+----------+----------+------+-----------------+ |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. Recommended Actions If you are running a version listed in the Versions known to be vulnerable column, you can eliminate this vulnerability by installing a version listed in the Fixes introduced in column. If the Fixes introduced in column does not list a version for your branch, then no update candidate currently exists for that branch and F5 recommends upgrading to a version with the fix (refer to the table). If the Fixes introduced in column lists a version prior to the one you are running, in the same branch, then your version should have the fix. Mitigation To mitigate this vulnerability, you can make modifications to the FTP profile. To do so, perform one of the following procedures: o Set the Data Port to 0 o Enable 'inherit-parent-profile' option in the FTP profile. o Disable the Allow Active Mode option to allow only passive FTP (BIG-IP 14.1.x - 16.1.x only) Set the Data Port to 0 Impact of action: None 1. Go to Local Traffic Management > Profiles > Services > FTP. 2. To create a custom FTP profile, select Create. 3. For Name, enter a name for this new FTP profile. 4. Under Settings, select the Custom box. 5. For Data Port, type 0. 6. To save the new custom FTP profile, select Finished. 7. Associate this FTP profile with your virtual server. Enable 'inherit-parent-profile' option in the FTP profile. Impact of action: Enabling Inherit Parent Profile allows the FTP data channel to inherit the TCP profile used by the control channel. When the setting is disabled (default setting), the data channel uses FastL4 only. Enabling Inherit Parent Profile and consequently not using FastL4 may cause a slight performance impact. 1. Go to Local Traffic Management > Profiles > Services > FTP. 2. To create a custom FTP profile, select Create. 3. For Name, enter a name for this new FTP profile. 4. Under Settings, select the Custom box. 5. Select the Inherit Parent Profile box. 6. To save the new custom FTP profile, select Finished. 7. Associate this FTP profile with your virtual server. Disable the Allow Active Mode option to allow only passive FTP (BIG-IP 14.1.x - 16.1.x only) Impact of action: Users will be able to connect to the FTP server using only passive FTP. 1. Go to Local Traffic Management > Profiles > Services > FTP. 2. To create a custom FTP profile, select Create. 3. For Name, enter a name for this new FTP profile. 4. Under Settings, select the Custom box. 5. To disable this feature, clear the Allow Active Mode box. 6. To save the new custom FTP profile, select Finished. 7. Associate this FTP profile with your virtual server. Acknowledgements This issue was discovered internally by F5. 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 - 17.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). 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