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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.1943.3 K51801290: RSRE Variant 3a vulnerability CVE-2018-3640 10 July 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: F5 BIG-IP products F5 Enterprise Manager F5 BIG-IQ products F5 iWorkflow Publisher: F5 Networks Operating System: Network Appliance Impact/Access: Access Privileged Data -- Existing Account Resolution: Mitigation CVE Names: CVE-2018-3640 Reference: ASB-2018.0121 ESB-2018.1750 ESB-2018.1573 ESB-2018.1548.6 Original Bulletin: https://support.f5.com/csp/article/K51801290 Revision History: July 10 2018: Added Heuristic H51801290. July 6 2018: Updated table of affected products. July 4 2018: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- K51801290: RSRE Variant 3a vulnerability CVE-2018-3640 Security Advisory Original Publication Date: Jul 04, 2018 Updated Date: Jul 06, 2018 Security Advisory Description Systems with microprocessors utilizing speculative execution and that perform speculative reads of system registers may allow unauthorized disclosure of system parameters to an attacker with local user access via a side-channel analysis, aka Rogue System Register Read (RSRE), Variant 3a. (CVE-2018-3640) Impact 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. On the control plane, the vulnerabilities are exploitable only by the following 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 attempt to exploit the vulnerabilities. This vulnerability requires an attacker who can provide and run binary code of their choosing on the BIG-IP platform. As a result, these conditions severely restrict the exposure risk of BIG-IP products. For single-tenancy products, such as a standalone BIG-IP device, the risk is limited to a local, authorized user employing one of the vulnerabilities to read information from memory that they would not normally access, exceeding their privileges. A user may be able to access kernel-space memory, instead of their own user-space. For multi-tenancy environments, such as cloud, Virtual Edition (VE), and Virtual Clustered Multiprocessing (vCMP), the same local kernel memory access risk applies as in single-tenancy environments. 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, which is outside the scope of F5's ability to support or patch. Contact your cloud provider or hypervisor vendor to ensure their platforms or products are protected against Spectre Variants. For vCMP environments, while the Spectre Variant attacks offer a theoretical possibility of guest-to-guest or guest-to-host attacks, they are difficult to successfully conduct in the BIG-IP environment. The primary risk in the vCMP environment with Spectre Variants only exists when vCMP guests are configured to use a single core. If the vCMP guests are configured to use two or more cores, the Spectre Variant vulnerabilities are eliminated. F5 is working with its hardware component vendors to determine the scope of vulnerabilities across its various generations of hardware platforms. All of the current information from F5's vendors is represented in this security advisory. F5 is working to obtain the remaining information from its vendors and will update the security advisory as F5 receives new information regarding its hardware platforms. F5 is also testing the fixes produced by the Linux community, and is conducting an extensive test campaign to characterize the impact of the fixes on system performance and stability to ensure a good experience for its customers. F5 does not want to rush the process and release fixes without a full understanding of potential issues. Given the limited exposure, the complexity of the fixes, and the potential issues, a detailed approach is warranted and rushing a fix could result in an impact to system stability or unacceptable performance costs. F5 will update this article with fixes as they become available. Security Advisory Status F5 Product Development has assigned ID 721501 (BIG-IP), ID 721951 (BIG-IQ), ID 345678 (Enterprise Manager), and ID 721955 (BIG-IQ) to this vulnerability. Additionally, BIG-IP iHealth may list Heuristic H51801290 on the Diagnostics > Identified > Low page. 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 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 | | |or feature| | | |vulnerable| | | | | |-------------------+------+----------+----------+----------+------+----------| |BIG-IP (LTM, AAM, |13.x |13.0.0 - |None | | | | |AFM, Analytics, | |13.1.0 | | | | | |APM, ASM, DNS, Edge|------+----------+----------| | |F5 | |Gateway, FPS, GTM, |12.x |12.1.0 - |None |Low |2.8 |hardware | |Link Controller, | |12.1.3 | | | |platforms | |PEM, |------+----------+----------| | | | |WebAccelerator) |11.x |11.2.1 - |None | | | | | | |11.6.3 | | | | | |-------------------+------+----------+----------+----------+------+----------| |ARX |6.x |None |Not |Not |None |None | | | | |applicable|vulnerable| | | |-------------------+------+----------+----------+----------+------+----------| | | | | | | |F5 | |Enterprise Manager |3.x |3.1.1 |None |Low |2.8 |hardware | | | | | | | |platforms | |-------------------+------+----------+----------+----------+------+----------| | |6.x |6.0.0 |None | | | | | |------+----------+----------| | |F5 | |BIG-IQ Centralized |5.x |5.0.0 - |None |Low |2.8 |hardware | |Management | |5.4.0 | | | |platforms | | |------+----------+----------| | | | | |4.x |4.6.0 |None | | | | |-------------------+------+----------+----------+----------+------+----------| |BIG-IQ Cloud and | | | | | |F5 | |Orchestration |1.x |1.0.0 |None |Low |2.8 |hardware | | | | | | | |platforms | |-------------------+------+----------+----------+----------+------+----------| | | |2.1.0 - | | | |F5 | |F5 iWorkflow |2.x |2.3.0 |None |Low |2.8 |hardware | | | | | | | |platforms | |-------------------+------+----------+----------+----------+------+----------| | |5.x |None |Not | | | | | | | |applicable|Not | | | |Traffix SDC |------+----------+----------|vulnerable|None |None | | |4.x |None |Not | | | | | | | |applicable| | | | +-----------------------------------------------------------------------------+ Vulnerable platforms Only one entry is shown in this table for platform models that may have several variants, for example BIG-IP 11000, BIG-IP 11050, BIG-IP 11050F, BIG-IP 11050N are all vulnerable and included in the table as: BIG-IP 110x0. Some platforms have multiple vendor processors that have one or more Intel core processor(s), and a vulnerable ARM processor in one or more subsystems. F5 investigated the use of ARM processors and while vulnerable processors are used, those processors do not handle privileged information; they are limited to running signed firmware from F5 with no capability to execute user-specified code. +----------------------------------------------------------+ |Product |Model |Processor type(s)|Vulnerable| |------------------+----------+-----------------+----------| |BIG-IP |B21x0 |Intel |Y | |------------------+----------+-----------------+----------| |BIG-IP |B2250 |Intel |Y | |------------------+----------+-----------------+----------| |BIG-IP |B4100 |AMD |N | |------------------+----------+-----------------+----------| |BIG-IP |B4200 |AMD |N | |------------------+----------+-----------------+----------| |BIG-IP |B43x0 |Intel |Y | |------------------+----------+-----------------+----------| |BIG-IP |B44x0 |Intel |Y | |------------------+----------+-----------------+----------| |BIG-IP |B2xx0 |Intel |Y | |------------------+----------+-----------------+----------| |BIG-IP |B4xx0 |Intel |Y | |------------------+----------+-----------------+----------| |BIG-IP |B5xx0 |Intel |Y | |------------------+----------+-----------------+----------| |BIG-IP |B7xx0 |Intel |Y | |------------------+----------+-----------------+----------| |BIG-IP |B210xxx |Intel |Y | |------------------+----------+-----------------+----------| |BIG-IP |B12xx0 |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 |800 |Intel |Y | |------------------+----------+-----------------+----------| |BIG-IP |1600 |Intel |Y | |------------------+----------+-----------------+----------| |BIG-IP |3600 |Intel |Y | |------------------+----------+-----------------+----------| |BIG-IP |3900 |Intel |Y | |------------------+----------+-----------------+----------| |BIG-IP |6900 |AMD |N | |------------------+----------+-----------------+----------| |BIG-IP |89x0 |AMD |N | |------------------+----------+-----------------+----------| |BIG-IP |110x0 |AMD |N | |------------------+----------+-----------------+----------| |BIG-IP |6400 |AMD |N | |------------------+----------+-----------------+----------| |BIG-IQ |7000 |Intel |Y | |------------------+----------+-----------------+----------| |Enterprise Manager|4000 |Intel |Y | |------------------+----------+-----------------+----------| |FirePass |FP12xx |Intel |N | |------------------+----------+-----------------+----------| |FirePass |FP41xx |AMD |N | |------------------+----------+-----------------+----------| |FirePass |FP43xx |AMD |N | |------------------+----------+-----------------+----------| |ARX |1500+ |Intel |Y | |------------------+----------+-----------------+----------| |ARX |2500 |Intel |Y | |------------------+----------+-----------------+----------| |ARX |4000/4000+|Intel |Y | +----------------------------------------------------------+ 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 None - --------------------------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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