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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.1883.3 BIG-IP Edge Client for Windows vulnerability CVE-2021-23022 13 July 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: BIG-IP APM BIG-IP APM Clients Publisher: F5 Networks Operating System: Windows Impact/Access: Increased Privileges -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-23023 CVE-2021-23022 Original Bulletin: https://support.f5.com/csp/article/K08503505 https://support.f5.com/csp/article/K33757590 Revision History: July 13 2021: Added fixes for BIG-IP APM 16.x branch June 9 2021: Updated fixed version details in K08503505 and K33757590 June 2 2021: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- K08503505: BIG-IP Edge Client for Windows vulnerability CVE-2021-23022 Original Publication Date: 02 Jun, 2021 Latest Publication Date: 09 Jun, 2021 Security Advisory Description The BIG-IP Edge Client Windows Installer Service's temporary folder has weak file and folder permissions. (CVE-2021-23022) Impact This vulnerability can be exploited to allow an unprivileged user to run a specially crafted application to gain privilege escalation on the client Windows system. Customers are advised to update to a fixed version of the Edge Client software as listed in the security advisory. Security Advisory Status F5 Product Development has assigned ID 984613, ID 1015381, and ID 1000609 (BIG-IP) 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. 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 following table 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 | | | |vulnerable^|in | |2 |or feature| | | |1 | | | | | +------------------+------+-----------+----------+----------+------+----------+ | |16.x |16.0.0 - |16.1.0 | | | | | | |16.0.1 | | | | | | +------+-----------+----------+ | | | | |15.x |15.1.0 - |None^3 | | | | | | |15.1.3 | | | | | | +------+-----------+----------+ | |BIG-IP | | |14.x |14.1.0 - |None^3 | | |Edge | | | |14.1.4 | | | |Client | |BIG-IP APM +------+-----------+----------+High |7.0 |Windows | | |13.x |13.1.0 - |None^3 | | |Component | | | |13.1.4 | | | |Installer | | +------+-----------+----------+ | |service | | |12.x |12.1.0 - |Will not | | | | | | |12.1.6 |fix | | | | | +------+-----------+----------+ | | | | |11.x |11.6.1 - |Will not | | | | | | |11.6.5 |fix | | | | +------------------+------+-----------+----------+----------+------+----------+ | | | | | | |BIG-IP | | | | | | | |Edge | | | |7.2.1 |7.2.1.3 | | |Client | |BIG-IP APM Clients|7.x |7.1.6 - |7.1.9.9 |High |7.0 |Windows | | | |7.1.9 |Update 1 | | |Component | | | | | | | |Installer | | | | | | | |service | +------------------+------+-----------+----------+----------+------+----------+ | |16.x |None |Not | | | | | | | |applicable| | | | | +------+-----------+----------+ | | | | |15.x |None |Not | | | | | | | |applicable| | | | |BIG-IP (LTM, AAM, +------+-----------+----------+ | | | |Advanced WAF, AFM,|14.x |None |Not | | | | |Analytics, ASM, | | |applicable|Not | | | |DDHD, DNS, FPS, +------+-----------+----------+vulnerable|None |None | |GTM, Link |13.x |None |Not | | | | |Controller, PEM, | | |applicable| | | | |SSLO) +------+-----------+----------+ | | | | |12.x |None |Not | | | | | | | |applicable| | | | | +------+-----------+----------+ | | | | |11.x |None |Not | | | | | | | |applicable| | | | +------------------+------+-----------+----------+----------+------+----------+ | |7.x |None |Not | | | | |BIG-IQ Centralized| | |applicable|Not | | | |Management +------+-----------+----------+vulnerable|None |None | | |6.x |None |Not | | | | | | | |applicable| | | | +------------------+------+-----------+----------+----------+------+----------+ |F5OS |1.x |None |Not |Not |None |None | | | | |applicable|vulnerable| | | +------------------+------+-----------+----------+----------+------+----------+ |Traffix SDC |5.x |None |Not |Not |None |None | | | | |applicable|vulnerable| | | +------------------+------+-----------+----------+----------+------+----------+ ^1F5 evaluates only software versions that have not yet reached the End of Technical Support (EoTS) phase of their lifecycle. ^2The CVSSv3 score link takes you to a resource outside of AskF5, and it is possible that the document may be removed without our knowledge. ^3In BIG-IP APM 13.1.0 and later, the APM Clients components can be updated independently from the BIG-IP software. To resolve this vulnerability in BIG-IP APM 13.1.0 and later, you can update the installed version of APM Clients to a version listed in the Fixes introduced in column, and set Component Update to Yes in the affected connectivity profile. For more information on Component Update, refer to K15302: Understanding BIG-IP Edge Client Component Update behavior for Windows, macOS, and Linux CLI. For more information about Edge Client versions, refer to K52547540: Updating BIG-IP Edge Client for the BIG-IP APM system and K13757: BIG-IP Edge Client version matrix. 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 Acknowledgements F5 acknowledges Jonas Vestberg of Sentor MSS AB and Daniel Hulliger of Armasuisse Science+Technology, CYD Campus, for bringing this issue to our attention and for following the highest standards of coordinated disclosure. 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 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 - -------------------------------------------------------------------------------- K33757590: BIG-IP Edge Client for Windows vulnerability CVE-2021-23023 Original Publication Date: 02 Jun, 2021 Latest Publication Date: 09 Jun, 2021 Security Advisory Description A DLL hijacking issue exists in cachecleaner.dll included in the BIG-IP Edge Client Windows Installer. (CVE-2021-23023) Impact This vulnerability may be exploited to allow an unprivileged user to use a malicious DLL to gain privilege escalation on the client Windows system. Customers are advised to update to a fixed version of the BIG-IP Edge Client software as listed in the security advisory. Security Advisory Status F5 Product Development has assigned ID 989317 (BIG-IP) 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. 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 following table 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 known|Fixes | |CVSSv3|Vulnerable | |Product |Branch|to be |introduced|Severity |score^|component or | | | |vulnerable^1 |in | |2 |feature | +------------+------+--------------+----------+----------+------+-------------+ | |16.x |16.0.0 - |16.1.0 | | | | | | |16.0.1 | | | | | | +------+--------------+----------+ | | | | |15.x |15.1.0 - |None^3 | | | | | | |15.1.3 | | | | | | +------+--------------+----------+ | | | | |14.x |14.1.0 - |None^3 | | | | | | |14.1.4 | | | |BIG-IP Edge | |BIG-IP APM +------+--------------+----------+High |7.0 |Client for | | |13.x |13.1.0 - |None^3 | | |Windows | | | |13.1.4 | | | | | | +------+--------------+----------+ | | | | |12.x |12.1.0 - |Will not | | | | | | |12.1.6 |fix | | | | | +------+--------------+----------+ | | | | |11.x |11.6.1 - |Will not | | | | | | |11.6.5 |fix | | | | +------------+------+--------------+----------+----------+------+-------------+ |BIG-IP APM | |7.2.1 |7.2.1.3 | | |BIG-IP Edge | |Clients |7.x |7.1.6 - 7.1.9 |7.1.9.9 |High |7.0 |Client for | | | | |Update 1 | | |Windows | +------------+------+--------------+----------+----------+------+-------------+ | |16.x |None |Not | | | | | | | |applicable| | | | | +------+--------------+----------+ | | | | |15.x |None |Not | | | | | | | |applicable| | | | | +------+--------------+----------+ | | | | |14.x |None |Not | | | | |BIG-IP (all | | |applicable|Not | | | |other +------+--------------+----------+vulnerable|None |None | |modules) |13.x |None |Not | | | | | | | |applicable| | | | | +------+--------------+----------+ | | | | |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| | | | +------------+------+--------------+----------+----------+------+-------------+ |F5OS |1.x |None |Not |Not |None |None | | | | |applicable|vulnerable| | | +------------+------+--------------+----------+----------+------+-------------+ |Traffix SDC |5.x |None |Not |Not |None |None | | | | |applicable|vulnerable| | | +------------+------+--------------+----------+----------+------+-------------+ ^1F5 evaluates only software versions that have not yet reached the End of Technical Support (EoTS) phase of their lifecycle. ^2The CVSSv3 score link takes you to a resource outside of AskF5, and it is possible that the document may be removed without our knowledge. ^3In BIG-IP APM 13.1.0 and later, the APM Clients components can be updated independently from the BIG-IP software. To resolve this vulnerability in BIG-IP APM 13.1.0 and later, you can update the installed version of APM Clients to a version listed in the Fixes introduced in column and set Component Update to Yes in the affected connectivity profile. For more information about Component Update, refer to K15302: Understanding BIG-IP Edge Client Component Update behavior for Windows, macOS, and Linux CLI. For more information about Edge Client versions, refer to K52547540: Updating BIG-IP Edge Client for the BIG-IP APM system and K13757: BIG-IP Edge Client version matrix. 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 Acknowledgements F5 acknowledges Jonas Vestberg of Sentor MSS AB for bringing this issue to our attention and following the highest standards of coordinated disclosure. 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 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. 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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 iQIVAwUBYO0lwONLKJtyKPYoAQjnUA/9H2lImK4YumQ5fIpwxK1iefT5jqiX0i/2 8Q+WPAV0VNV6QVb0nT608YAcrCmlpgJXOtDyWQePHFwosyT70AKGMwJBTlMviJY6 J9ErV7Z5fVHihQszvN9bXOYIJGfjaA4ndO0KtPrNVtzoRYPvXf8+PQw093J0XSvH ZW6BueBusECqcz5dJMoSUb/D6a2quQNPXhcl+us7fI1PvPnxVXBVINfb9IDZ28QT JrKyw74P8CEzLAIDmGrq9P39p+M+r0/UIVLKh/K43IPLI/Eyj2soFRpmrysF4Xrk h4F1dsZKWCeY0g6PYrSbVU5k6cny0zKWilBt0ikqi1gXFkoetKyquybOraUpv75q 888jJlH47kkCjtBecW/pZyfYd3o51tQtjLblQx0+91k/rtKkLoWRf1+xN4ZQ7hmC kqDEjuOzOuyP6bs7aoBpfEseJ+n6v22EUauxInQ3knYuEK9Z6t2LYcBmKeSdKfGZ /6nC31Bq7egLTz4sx3jlZol34xGFcpJ4WjhrKlfwTMFN+KIZQt7hqN9CjsbOV01J eVRZ6dnDWlmCF78yLYjNRBlkf1k7xQ893HAmz4hi8XC8hquam+iSZFFLfzSKdSm4 JFm1lG1Rm5gb+QqPKduGkQhIHAyiNWwzKLOEHrTclrgA0QqNJbDTfrMcwa72QSAr zJXLc58l/Cc= =hKV2 -----END PGP SIGNATURE-----