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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.4543 cURL vulnerability CVE-2019-5482 23 December 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: BIG-IP BIG-IQ Traffix SDC Publisher: F5 Networks Operating System: Network Appliance Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Resolution: Mitigation CVE Names: CVE-2019-5482 Reference: ASB-2020.0190 ESB-2020.3700 ESB-2020.3631 ESB-2020.3348 Original Bulletin: https://support.f5.com/csp/article/K41523201 - --------------------------BEGIN INCLUDED TEXT-------------------- K41523201: cURL vulnerability CVE-2019-5482 Original Publication Date: 23 Dec, 2020 Security Advisory Description Heap buffer overflow in the TFTP protocol handler in cURL 7.19.4 to 7.65.3. ( CVE-2019-5482) Impact An attacker could cause a denial of service (DoS) or arbitrary code execution if you use cURL to transfer data to or from a Trivial File Transport Protocol (TFTP) server and set the blksize (block size) option to a value below 504 (the default value is 512). Setting a smaller block size than the default should be rare as the primary use case for changing the block size is to make it larger. Security Advisory Status F5 Product Development has assigned ID 965485 (BIG-IP), ID 969393 (BIG-IQ), and CPF-25220 (Traffix SDC) 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 or| | | |be |in | |1 |feature | | | |vulnerable| | | | | +-----------------+------+----------+----------+----------+------+------------+ | |16.x |None |Non | | | | | | | |applicable| | | | | +------+----------+----------+ | | | | |15.x |None |Not | | | | | | | |applicable| | | | | +------+----------+----------+ | | | | |14.x |None |Not | | | | | | | |applicable|Not | | | |BIG-IP (APM) +------+----------+----------+vulnerable|None |None | | |13.x |None |Not | | | | | | | |applicable| | | | | +------+----------+----------+ | | | | |12.x |None |Not | | | | | | | |applicable| | | | | +------+----------+----------+ | | | | |11.x |None |Not | | | | | | | |applicable| | | | +-----------------+------+----------+----------+----------+------+------------+ | |16.x |None |Not | | | | | | | |applicable| | | | | +------+----------+----------+ | | | | |15.x |None |Not | | | | | | | |applicable| | | | | +------+----------+----------+ | | | | |14.x |None |Not | | | | | | | |applicable|Not | | | |BIG-IP (AFM) +------+----------+----------+vulnerable|None |None | | |13.x |None |Not | | | | | | | |applicable| | | | | +------+----------+----------+ | | | | |12.x |None |Not | | | | | | | |applicable| | | | | +------+----------+----------+ | | | | |11.x |None |Not | | | | | | | |applicable| | | | +-----------------+------+----------+----------+----------+------+------------+ | |16.x |16.0.0 - |None | | | | | | |16.0.1 | | | | | | +------+----------+----------+ | | | | |15.x |15.1.0 - |None | | | | | | |15.1.2 | | | | | |BIG-IP (LTM, AAM,+------+----------+----------+ | |cURL utility| |Advanced WAF, |14.x |14.1.0 - |None | | |(Remote | |Analytics, ASM, | |14.1.3 | | | |Installation| |DDHD, DNS, FPS, +------+----------+----------+Medium |6.3 |methods and | |GTM, Link |13.x |13.1.0 - |None | | |custom | |Controller, PEM, | |13.1.3 | | | |iRules) | |SSLO) +------+----------+----------+ | | | | |12.x |12.1.0 - |None | | | | | | |12.1.5 | | | | | | +------+----------+----------+ | | | | |11.x |11.6.1 - |None | | | | | | |11.6.5 | | | | | +-----------------+------+----------+----------+----------+------+------------+ | |7.x |7.0.0 - |None | | |cURL utility| | | |7.1.0 | | | |(Remote | |BIG-IQ +------+----------+----------+ | |Installation| |Centralized |6.x |6.0.0 - |None |Medium |6.3 |methods and | |Management | |6.1.0 | | | |custom | | +------+----------+----------+ | |iRules) | | |5.x |5.4.0 |None | | | | +-----------------+------+----------+----------+----------+------+------------+ | | | | | | |cURL utility| | | | | | | |(Remote | |Traffix SDC |5.x |5.1.0 |None |Medium |6.3 |Installation| | | | | | | |methods and | | | | | | | |custom | | | | | | | |iRules) | +-----------------+------+----------+----------+----------+------+------------+ ^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 and BIG-IQ products Impact of action: Performing the recommended actions should not have a negative impact on your system. You should remove or disable the iRule if you are using a custom iRule containing a cURL command to communicate with an untrusted external TFTP server. o If you are using Remote Installation by way of TFTP, either switch to a different secure protocol such as HTTPS/FTPS or use TFTP only against a trusted installation server. o You should permit access to the system only over a secure network and limit login access to only trusted users. For more information, refer to K13309: Restricting access to the Configuration utility by source IP address (11.x - 16.x) and K13092: Overview of securing access to the BIG-IP system. 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 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. 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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). 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