12 July 2019
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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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