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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.3234.3 F5 products: Spectre SWAPGS gadget vulnerability CVE-2019-1125 20 August 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: F5 products Publisher: F5 Networks Operating System: Network Appliance Impact/Access: Access Privileged Data -- Existing Account Resolution: Mitigation CVE Names: CVE-2019-1125 CVE-2018-3693 Reference: ASB-2019.0229 ESB-2019.3128 ESB-2018.2343 ESB-2018.0113.5 Original Bulletin: https://support.f5.com/csp/article/K31085564 Revision History: August 20 2020: Fixes available for BIG-IP 14.x branch July 14 2020: Updated Security Advisory Description August 26 2019: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- K31085564:Spectre SWAPGS gadget vulnerability CVE-2019-1125 Security Advisory Original Publication Date: 23 Aug, 2019 Latest Publication Date: 13 Jul, 2020 Security Advisory Description An information disclosure vulnerability exists when certain central processing units (CPU) speculatively access memory, aka 'Windows Kernel Information Disclosure Vulnerability'. This CVE ID is unique from CVE-2019-1071, CVE-2019-1073. (CVE-2019-1125 also known as Spectre SWAPGS gadget vulnerability) A Spectre gadget was found in the Linux kernel's implementation of system interrupts. An attacker with unprivileged local access could use this information to reveal private data through a Spectre-like side channel. Impact F5 continues to investigate the impact of the Spectre SWAPGS gadget vulnerability on our products. F5 is focused on providing patched releases as soon as we have fully tested and verified fixes. F5 will update this article with the most current information as soon as it is confirmed. BIG-IP First and foremost, there is no exposure on BIG-IP products by way of the data plane. All exposure is limited to the control plane (also known as the management plane). Furthermore, on the control plane, the vulnerability is exploitable only by four authorized, authenticated account roles: Administrator, Resource Administrator, Manager, and iRules Manager. You must be authorized to access the system in one of these roles to even attempt to exploit the vulnerability. This vulnerability requires an attacker who can provide and run binary code of their choosing on the BIG-IP platform. These conditions severely restrict the exposure risk of BIG-IP products. For single-tenancy products, such as a standalone BIG-IP appliance, the risk is limited to a local, authorized user using this vulnerability to read information from memory that they would not normally be able to access, exceeding their privileges. Effectively, the risk in a single-tenancy situation is that a user may be able to access kernel-space memory, instead of being limited to their own user-space. For multi-tenancy environments, such as cloud, VE, and Virtual Clustered Multiprocessing (vCMP), the same local risk applies as with single-tenancy environments - local kernel memory access. Additionally, the risk of attacks across guests exists, or attacks against the hypervisor/host. In cloud and VE environments, preventing these new attacks falls on the hypervisor/host platform, outside the scope of F5's ability to support or patch. Please contact your cloud provider or hypervisor vendor to ensure that their platforms or products are protected against this Spectre vulnerability. For vCMP environments, F5 believes that while the Spectre SWAPGS gadget vulnerability does offer a theoretical possibility of guest-to-guest or guest-to-host attacks, these would be very difficult to successfully conduct in the BIG-IP environment. F5 is working with our hardware component vendors to determine the scope of this vulnerability across our various generations of hardware platforms. All of the information we currently have from our vendors is represented in this Security Advisory. We are also testing the fixes produced by the Linux community. We are conducting an extensive test campaign to characterize the impact of the fixes on system performance and stability to ensure, as best we can, a good experience for our customers. We do not want to rush the process and release fixes without a full understanding of any potential issues. Given the limited exposure, as detailed above, the complexity of the fixes, and the potential issues that we and others have seen, we believe a detailed approach is warranted and that rushing a fix could result in an impact to system stability or unacceptable performance costs. We will update this article with details of our fixes as they become available. To determine if this vulnerability affects a platform and the processor type each platform uses, refer to the following table. Note: In the following table, only one entry is shown for platform models that may have several variants. For example, BIG-IP 11000, BIG-IP 11050, BIG-IP 11050F, and BIG-IP 11050N are all vulnerable and included in the table as "BIG-IP 110x0". Some platforms may have multiple vendor processors, such as the iSeries platforms, which have one or more Intel core processors and may have a vulnerable ARM processor in one or more subsystems. F5 does not believe that ARM processors in these subsystems are accessible to attackers, unless some other code-execution vulnerability is present, but the information is being provided out of an abundance of caution. +-------------+-----------+---------------------------------------------------+ |Model |Processor |Vulnerable to CVE-2019-1125 Spectre SWAPGS gadget | | |type |vulnerability | +-------------+-----------+---------------------------------------------------+ |VIPRION B21x0|Intel |Y | +-------------+-----------+---------------------------------------------------+ |VIPRION B2250|Intel |Y | +-------------+-----------+---------------------------------------------------+ |VIPRION B4100|AMD |Y | +-------------+-----------+---------------------------------------------------+ |VIPRION B4200|AMD |Y | +-------------+-----------+---------------------------------------------------+ |VIPRION B43x0|Intel |Y | +-------------+-----------+---------------------------------------------------+ |VIPRION B44x0|Intel |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP 800 |Intel |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP 1600 |Intel |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP 3600 |Intel |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP 3900 |Intel |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP 2xx0 |Intel |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP 4xx0 |Intel |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP 5xx0 |Intel |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP 7xx0 |Intel |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP 10xx0 |Intel |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP 12xx0 |Intel |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP i2x00 |Intel, ARM |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP i4x00 |Intel, ARM |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP i5x00 |Intel, ARM |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP i7x00 |Intel, ARM |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP i10x00|Intel, ARM |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP 6400 |AMD |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP 6900 |AMD |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP 89x0 |AMD |Y | +-------------+-----------+---------------------------------------------------+ |BIG-IP 110x0 |AMD |Y | +-------------+-----------+---------------------------------------------------+ Note: Platform models that have reached End of Technical Support (EoTS) will not be evaluated. For more information, refer to K4309: F5 platform lifecycle support policy. BIG-IQ and Enterprise Manager Systems with microprocessors that use speculative execution and indirect branch prediction may allow unauthorized disclosure of information to an attacker with local user access by way of a side-channel analysis. To determine if this vulnerability affects each platform and the processor type each platform uses, refer to the following table. +--------------------+------------+-------------------------------------------+ |Model |Processor |Vulnerable to CVE-2018-3693 Spectre-NG | | |type |Variant 1.1 | +--------------------+------------+-------------------------------------------+ |BIG-IQ 7000 |Intel |Y | +--------------------+------------+-------------------------------------------+ |Enterprise Manager |Intel |Y | |4000 | | | +--------------------+------------+-------------------------------------------+ Note: Platform models that have reached End of Technical Support (EoTS) will not be evaluated. For more information, refer to K4309: F5 platform lifecycle support policy. Traffix Systems with microprocessors that use speculative execution and indirect branch prediction may allow unauthorized disclosure of information to an attacker with local user access by way of a side-channel analysis. Security Advisory Status F5 Product Development has assigned IDs 816413 and 816417 (BIG-IP), ID 816417-2 (BIG-IQ), and CPF-25123 (Traffix), to this vulnerability. Note: F5 iWorkflow and Enterprise Manager have not yet been assigned IDs. 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 |None |16.0.0 | | | | | +------+----------+----------+ | | | | |15.x |15.0.0 - |15.0.1.4 | | | | | | |15.1.0 | | | | | | +------+----------+----------+ | | | |BIG-IP (LTM, AAM, |14.x |14.0.0 - |14.1.2.7 | | | | |AFM, Analytics, APM, | |14.1.2 | | | | | |ASM, DNS, Edge +------+----------+----------+Medium |5.9 |CPU, Linux| |Gateway, FPS, GTM, |13.x |13.1.0 - |None | | |kernel | |Link Controller, PEM,| |13.1.3 | | | | | |WebAccelerator) +------+----------+----------+ | | | | |12.x |12.1.0 - |None | | | | | | |12.1.5 | | | | | | +------+----------+----------+ | | | | |11.x |11.5.2 - |None | | | | | | |11.6.5 | | | | | +---------------------+------+----------+----------+--------+------+----------+ |Enterprise Manager |3.x |3.1.1 |None |Medium |5.9 |CPU, Linux| | | | | | | |kernel | +---------------------+------+----------+----------+--------+------+----------+ | |7.x |7.0.0 - |None | | | | | | |7.1.0 | | | | | | +------+----------+----------+ | | | |BIG-IQ Centralized |6.x |6.0.0 - |None |Medium |5.9 |CPU, Linux| |Management | |6.1.0 | | | |kernel | | +------+----------+----------+ | | | | |5.x |5.1.0 - |None | | | | | | |5.4.0 | | | | | +---------------------+------+----------+----------+--------+------+----------+ |F5 iWorkflow |2.x |2.3.0 |None |Medium |5.9 |CPU, Linux| | | | | | | |kernel | +---------------------+------+----------+----------+--------+------+----------+ |Traffix SDC |5.x |5.0.0 - |None |Medium |5.9 |CPU, Linux| | | |5.1.0 | | | |kernel | +---------------------+------+----------+----------+--------+------+----------+ ^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 BIG-IP The only roles on a BIG-IP system that can exploit this vulnerability are the Administrator, Resource Administrator, Manager, and iRules Manager roles. To mitigate against this vulnerability, ensure that you limit access to these roles to only trusted employees. For BIG-IP Virtual Editions deployed in a publicly shared tenant virtual environment, contact your cloud provider to ensure their platforms or products are protected against Spectre variants. Supplemental Information o K51812227: Understanding Security Advisory versioning 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 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. 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