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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.2562 JSA10948 - 2019-07 Security Bulletin: Junos OS: J-Web Denial of Service due to multiple vulnerabilities in Embedthis Appweb Server 12 July 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Junos OS Publisher: Juniper Networks Operating System: Juniper Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-15505 CVE-2018-15504 Original Bulletin: http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10948 - --------------------------BEGIN INCLUDED TEXT-------------------- 2019-07 Security Bulletin: Junos OS: J-Web Denial of Service due to multiple vulnerabilities in Embedthis Appweb Server Article ID: JSA10948 Last Updated: 10 Jul 2019 Version: 2.0 Product Affected: This issue affects all products and platforms running Junos OS with J-Web enabled. Problem: Multiple vulnerabilities exist in the Embedthis Appweb server, used by J-Web, related to the way the server mishandles some HTTP headers and request fields. These issues may result in a Denial of Service (DoS) for the J-Web graphical user interface. These issues affect Juniper Networks Junos OS: o 12.3 versions prior to 12.3R12-S14; o 12.3X48 versions prior to 12.3X48-D80; o 15.1 versions prior to 15.1F6-S13, 15.1R7-S4; o 15.1X49 versions prior to 15.1X49-D170; o 15.1X53 versions prior to 15.1X53-D497; o 16.1 versions prior to 16.1R4-S13, 16.1R7-S5; o 16.2 versions prior to 16.2R2-S10; o 17.1 versions prior to 17.1R3; o 17.2 versions prior to 17.2R2-S7, 17.2R3-S1; o 17.3 versions prior to 17.3R3-S5; o 17.4 versions prior to 17.4R1-S7, 17.4R2-S4, 17.4R3; o 18.1 versions prior to 18.1R3-S5. Important security issues resolved include: CVE CVSS Summary An issue was discovered in Embedthis GoAhead 7.5 ( CVSS:3.0 before 4.0.1 and Appweb before 7.0.2. The server /AV:N/AC:L/ mishandles some HTTP request fields associated CVE-2018-15504 PR:N/UI:N/S:U/ with time, which results in a NULL pointer C:N/I:N/A:H ) dereference, as demonstrated by If-Modified-Since or If-Unmodified-Since with a month greater than 11. An issue was discovered in Embedthis GoAhead 7.5 ( CVSS:3.0 before 4.0.1 and Appweb before 7.0.2. An HTTP /AV:N/AC:L/ POST request with a specially crafted "Host" CVE-2018-15505 PR:N/UI:N/S:U/ header field may cause a NULL pointer dereference C:N/I:N/A:H ) and thus cause a denial of service, as demonstrated by the lack of a trailing ']' character in an IPv6 address. Solution: The following software releases have been updated to resolve this specific issue: 12.3R12-S14*, 12.3X48-D80, 15.1F6-S13, 15.1R7-S4, 15.1X49-D170, 15.1X53-D497, 16.1R4-S13, 16.1R7-S5, 16.2R2-S10, 17.1R3, 17.2R2-S7, 17.2R3-S1, 17.3R3-S5, 17.4R1-S7, 17.4R2-S4, 17.4R3, 18.1R3-S5, 18.2R1, and all subsequent releases. * Late availability This issue is being tracked as PR 1345330 which is visible on the Customer Support website. Workaround: Disable J-Web, or limit access to only trusted hosts. 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-2018-15504 at cve.mitre.org o CVE-2018-15505 at cve.mitre.org CVSS Score: 7.5 (CVSS:3.1/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." - --------------------------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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