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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.3550 JSA11054 - 2020-10 Security Bulletin: Junos OS: MX Series: Receipt of specific packets can cause services card to restart when DNS filtering is configured. (CVE-2020-1660) 15 October 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Junos OS MX Series Publisher: Juniper Networks Operating System: Juniper Impact/Access: Denial of Service -- Remote/Unauthenticated Reduced Security -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2020-1660 Original Bulletin: http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11054 - --------------------------BEGIN INCLUDED TEXT-------------------- 2020-10 Security Bulletin: Junos OS: MX Series: Receipt of specific packets can cause services card to restart when DNS filtering is configured. (CVE-2020-1660) Article ID : JSA11054 Last Updated: 14 Oct 2020 Version : 1.0 Product Affected: This issue affects Junos OS 17.3, 18.3, 18.4, 19.1, 19.2, 19.3. Affected platforms: MX Series. Problem: When DNS filtering is enabled on Juniper Networks Junos MX Series with one of the following cards MS-PIC, MS-MIC or MS-MPC, an incoming stream of packets processed by the Multiservices PIC Management Daemon (mspmand) process, responsible for managing "URL Filtering service", may crash, causing the Services PIC to restart. While the Services PIC is restarting, all PIC services including DNS filtering service (DNS sink holing) will be bypassed until the Services PIC completes its boot process. This vulnerability might allow an attacker to cause an extended Denial of Service (DoS) attack against the device and to cause clients to be vulnerable to DNS based attacks by malicious DNS servers when they send DNS requests through the device. As a result, devices which were once protected by the DNS Filtering service are no longer protected and at risk of exploitation. This issue affects Juniper Networks Junos OS: o 17.3 versions prior to 17.3R3-S8; o 18.3 versions prior to 18.3R3-S1; o 18.4 versions prior to 18.4R3; o 19.1 versions prior to 19.1R3; o 19.2 versions prior to 19.2R2; o 19.3 versions prior to 19.3R3. This issue does not affect Juniper Networks Junos OS 17.4, 18.1, and 18.2. The following minimal configuration is required: [services web-filter profile profile-name dns-filter-template <template-name>] 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-2020-1660 . Solution: The following software releases have been updated to resolve this specific issue: Junos OS 17.3R3-S8, 18.3R3-S1, 18.4R3, 19.1R3, 19.2R2, 19.3R3, 19.4R1 and all subsequent releases. This issue is being tracked as 1469188 . Workaround: There are no viable workarounds for this issue. Implementation: Software releases or updates are available for download at https:// www.juniper.net/support/downloads/ . Modification History: 2020-10-14: Initial Publication. CVSS Score: 8.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L) Severity Level: High Severity 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. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. 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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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBX4e/keNLKJtyKPYoAQi9DxAAq5eYV1MBu4/BkpPWoFdISjflcGxU/C4D vOxDD+jp5e1Q9y1E0+TwEWtKorLN0cR+44ay/pDWZlAyu485Aa0pRrOjtPZrZ+Ql bgGJvK8QCM7RF9d0VQV4cv+t3V2POwxoUhVnuAyoE3Q6Ri0JxQiSk5PGGqr+qkmZ WdBjAOKLeJTRIO3SvSOdkJVT9vyfh/kmKlXIL/1Fw6fEKQj3V8Hp2fjD8WBzhj3h ORtZCN1+gW4NEcTjAZUVl3gdIdQzOr7oXESLdK3krPvA5R4UaPT8qPVWABxLzwgI dCDOKkdtSjjykUmifaCMwNmybeMQ9HeuxPiI8n9o9DT5KC6OK8Ftc5bFI/XV0gH4 ywt8YWlsZRLYNb8Ayib6Rt3nm2tiCzEy9GwADxSQuxBjDqru1qjf78Y9jWRQtB7R 7HW8BhRIjaHBCiEkPamG6XTJORuh088ONHkBKCaVwU1u2inLyIsuRKgVYqSd208/ vykLnbvxs7owEzCrv/rcAqZ7eFNwNwqrBWdwLl4qnhwXEDuPA9I3wDIz0f8hjK/e TXS5PX80IzvG3hV5PRDi7MRaj4Q5gmIoKzOEl0TvZyAEMBoDeiTcaOiFdYMp/jGr NXWgimnzWkrq3kBM+tP/1h+kXjoHsXk0W5jX08jmeVJsaVqJk3fMhjoRzy6hfXnE awGQGG75Z3w= =AJLS -----END PGP SIGNATURE-----