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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.2559 JSA10938 - 2019-07 Security Bulletin: Junos OS: EX4300 Series: Denial of Service upon receipt of large number of specific valid packets on management interface. (CVE-2019-0046) 12 July 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Juniper EX4300 Series Publisher: Juniper Networks Operating System: Juniper Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2019-0046 Original Bulletin: http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10938 - --------------------------BEGIN INCLUDED TEXT-------------------- 2019-07 Security Bulletin: Junos OS: EX4300 Series: Denial of Service upon receipt of large number of specific valid packets on management interface. (CVE-2019-0046) Article ID: JSA10938 Last Updated: 10 Jul 2019 Version: 4.0 Product Affected: This issue affects Junos OS 16.1, 17.1, 17.2, 17.3, 17.4, 18.1, 18.2 on EX4300 Series. Problem: A vulnerability in the pfe-chassisd Chassis Manager (CMLC) daemon of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) to the EX4300 when specific valid broadcast packets create a broadcast storm condition when received on the me0 interface of the EX4300 Series device. A reboot of the device is required to restore service. Continued receipt of these valid broadcast packets will create a sustained Denial of Service (DoS) against the device. Affected releases are Juniper Networks Junos OS: o 16.1 versions above and including 16.1R1 prior to 16.1R7-S5; o 17.1 versions prior to 17.1R3; o 17.2 versions prior to 17.2R3; o 17.3 versions prior to 17.3R3-S2; o 17.4 versions prior to 17.4R2; o 18.1 versions prior to 18.1R3; o 18.2 versions prior to 18.2R2. The following minimal configuration is required: set interfaces me0 Juniper SIRT is not aware of any malicious exploitation of this vulnerability. This issue was seen during production usage. This issue has been assigned CVE-2019-0046 . Solution: The following software releases have been updated to resolve this specific issue: 16.1R7-S5, 17.1R3, 17.2R3, 17.3R3-S2, 17.4R2, 18.1R3, 18.2R2, 18.3R1, and all subsequent releases. This issue is being tracked as PR 1329430 which is visible on the Customer Support website. Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL). Workaround: There are no viable workarounds for this issue. Implementation: Software Releases, patches and updates are available at https://www.juniper.net /support/downloads/ . Modification History: o 2019-07-10: Initial Publication Related Links: o KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process o KB16765: In which releases are vulnerabilities fixed o KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories o Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team o CVE-2019-0046 at cve.mitre.org CVSS Score: 6.5 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) Risk Level: Medium Risk Assessment: Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories." - --------------------------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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