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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.1267 JSA10922 - 2019-04 Security Bulletin: SRX Series: A remote attacker may cause a high CPU Denial of Service to the device when proxy ARP is configured. (CVE-2019-0033) 12 April 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Juniper SRX Series Publisher: Juniper Networks Operating System: Network Appliance Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2019-0038 CVE-2019-0033 Original Bulletin: http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10922 http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10927 Comment: This bulletin contains two (2) Juniper Networks security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- 2019-04 Security Bulletin: SRX Series: A remote attacker may cause a high CPU Denial of Service to the device when proxy ARP is configured. (CVE-2019-0033) Article ID: JSA10922 Last Updated: 10 Apr 2019 Version: 2.0 Product Affected: This issue affects Junos OS 12.1X46, 12.3X48, 15.1X49. Affected platforms: SRX Series. Problem: A firewall bypass vulnerability in the proxy ARP service of Juniper Networks Junos OS allows an attacker to cause a high CPU condition leading to a Denial of Service (DoS). This issue affects only IPv4. Affected releases are Juniper Networks Junos OS: o 12.1X46 versions above and including 12.1X46-D25 prior to 12.1X46-D71, 12.1X46-D73 on SRX Series; o 12.3X48 versions prior to 12.3X48-D50 on SRX Series; o 15.1X49 versions prior to 15.1X49-D75 on SRX Series. An example configuration snippet is below: root@device# show security nat proxy-arp interface ge-0/0/0.0 { address { 2.2.2.5/32; } } 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-2019-0033. Solution: The following software releases have been updated to resolve this specific issue: 12.1X46-D71, 12.1X46-D73, 12.3X48-D50, 15.1X49-D75, 17.3R1, and all subsequent releases. This issue is being tracked as PR 1208910 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: Discontinue use of proxy ARP. An example configuration snippet is below: deactivate security nat proxy-arp interface ge-0/0/0.0 address 2.2.2.5/32 (or) delete security nat proxy-arp interface ge-0/0/0.0 address 2.2.2.5/32 There are no other viable workarounds for this issue. Implementation: Software Releases, patches and updates are available at https://www.juniper.net /support/downloads/ . Modification History: o 2019-04-10: 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-2019-0033 at cve.mitre.org CVSS Score: 7.5 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) Risk Level: High 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." =============================================================================== 2019-04 Security Bulletin: SRX Series: Crafted packets destined to fxp0 management interface on SRX340/SRX345 devices can lead to DoS (CVE-2019-0038) Article ID: JSA10927 Last Updated: 10 Apr 2019 Version: 1.0 Product Affected: This issue affects Junos OS 15.1X49, 17.3, 17.4, 18.1, 18.2, 18.3. Affected platforms: SRX340/SRX345. Problem: Crafted packets destined to the management interface (fxp0) of an SRX340 or SRX345 services gateway may create a denial of service (DoS) condition due to buffer space exhaustion. This issue only affects the SRX340 and SRX345 services gateways. No other products or platforms are affected by this vulnerability. Affected releases are Juniper Networks Junos OS: o 15.1X49 versions prior to 15.1X49-D160 on SRX340/SRX345; o 17.3 on SRX340/SRX345; o 17.4 versions prior to 17.4R2-S3, 17.4R3 on SRX340/SRX345; o 18.1 versions prior to 18.1R3-S1 on SRX340/SRX345; o 18.2 versions prior to 18.2R2 on SRX340/SRX345; o 18.3 versions prior to 18.3R1-S2, 18.3R2 on SRX340/SRX345. This issue does not affect Junos OS releases prior to 15.1X49 on any platform. Juniper SIRT is not aware of any malicious exploitation of this vulnerability. The following log message may be displayed when the device is in this condition: octagl_output:1093: out of buf octagl_output:1093: out of buf octagl_output:1093: out of buf Administrators can monitor buffer space utilization by executing the command: request pfe execute target fwdd command "show octeon fpa buffers" ================ cluster1.node0 ================ SENT: Ukern command: show octeon fpa buffers FPA 0: Avail: 23632, Errors: 0 FPA 1: Avail: 22444, Errors: 0 FPA 2: Avail: 0, Errors: 0 FPA 3: Avail: 135, Errors: 0 FPA 4: Avail: 0, Errors: 0 This issue was seen during production usage. This issue has been assigned CVE-2019-0038 . Solution: The following software releases have been updated to resolve this specific issue: Junos OS 15.1X49-D160, 17.4R2-S3, 17.4R3, 18.1R3-S1, 18.2R2, 18.3R1-S2, 18.3R2, 18.4R1, and all subsequent releases. This issue is being tracked as PR 1377152 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 known workarounds for this issue. Implementation: Software Releases, patches and updates are available at https://www.juniper.net /support/downloads/ . Modification History: o 2019-04-10: 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 CVSS Score: 6.5 (CVSS:3.0/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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