Read the docs
TI-2020-01609 Aliases CVE-2020-1660GHSA-xcrv-h2x7-7qcc

Junos OS: MX Series: Receipt of specific packets can cause services card to restart when DNS filtering is configured.

Priority MEDIUM 44CWE-362Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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: 17.3 versions prior to 17.3R3-S8; 18.3 versions prior to 18.3R3-S1; 18.4 versions prior to 18.4R3; 19.1 versions prior to 19.1R3; 19.2 versions prior to 19.2R2; 19.3 versions prior to 19.3R3. This issue does not affect Juniper Networks Junos OS 17.4, 18.1, and 18.2.

Why it matters now

EPSS 0.0079 56th percentileScored 2026-11-07
Fix Fixed Junos OS (Juniper Networks): 17.3R3-S8, 18.3R3-S1, 18.4R3 +6

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
JuniperJunos OS17.3 to before 17.3R3-S8; 18.3 to before 18.3R3-S1; 18.4 to before 18.4R3; 19.1 to before 19.1R3; 19.2 to before 19.2R2; 19.3 to before 19.3R317.3R3-S8, 18.3R3-S1, 18.4R3, 19.1R3, 19.2R2, 19.3R3Patch availableCNA
JuniperJunos OS—17.4, 18.1, 18.2Patch availableCNA
  • Junos OS VendorJuniper Affected 17.3 to before 17.3R3-S8; 18.3 to before 18.3R3-S1; 18.4 to before 18.4R3; 19.1 to before 19.1R3; 19.2 to before 19.2R2; 19.3 to before 19.3R3 Fixed in 17.3R3-S8, 18.3R3-S1, 18.4R3, 19.1R3, 19.2R2, 19.3R3 Patch available CNA
  • Junos OS VendorJuniper Affected — Fixed in 17.4, 18.1, 18.2 Patch available CNA

CPE configurations NVD · 56

CPEVersionsRoleVendor
cpe:2.3:o:juniper:junos:17.3:-:*:*:*:*:*:*17.3VulnerableJuniper
cpe:2.3:o:juniper:junos:17.3:r1-s1:*:*:*:*:*:*17.3 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:17.3:r2:*:*:*:*:*:*17.3 r2VulnerableJuniper
cpe:2.3:o:juniper:junos:17.3:r2-s1:*:*:*:*:*:*17.3 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:17.3:r2-s2:*:*:*:*:*:*17.3 r2-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:17.3:r2-s3:*:*:*:*:*:*17.3 r2-s3VulnerableJuniper
cpe:2.3:o:juniper:junos:17.3:r2-s4:*:*:*:*:*:*17.3 r2-s4VulnerableJuniper
cpe:2.3:o:juniper:junos:17.3:r2-s5:*:*:*:*:*:*17.3 r2-s5VulnerableJuniper
cpe:2.3:o:juniper:junos:17.3:r3:-:*:*:*:*:*17.3 r3VulnerableJuniper
cpe:2.3:o:juniper:junos:17.3:r3-s1:*:*:*:*:*:*17.3 r3-s1VulnerableJuniper
  • cpe:2.3:o:juniper:junos:17.3:-:*:*:*:*:*:* Versions 17.3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:17.3:r1-s1:*:*:*:*:*:* Versions 17.3 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:17.3:r2:*:*:*:*:*:* Versions 17.3 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:17.3:r2-s1:*:*:*:*:*:* Versions 17.3 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:17.3:r2-s2:*:*:*:*:*:* Versions 17.3 r2-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:17.3:r2-s3:*:*:*:*:*:* Versions 17.3 r2-s3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:17.3:r2-s4:*:*:*:*:*:* Versions 17.3 r2-s4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:17.3:r2-s5:*:*:*:*:*:* Versions 17.3 r2-s5 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:17.3:r3:-:*:*:*:*:* Versions 17.3 r3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:17.3:r3-s1:*:*:*:*:*:* Versions 17.3 r3-s1 Vulnerable ·Juniper
Show 46 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:juniper:junos:17.3:r3-s2:*:*:*:*:*:*17.3 r3-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:17.3:r3-s3:*:*:*:*:*:*17.3 r3-s3VulnerableJuniper
cpe:2.3:o:juniper:junos:17.3:r3-s4:*:*:*:*:*:*17.3 r3-s4VulnerableJuniper
cpe:2.3:o:juniper:junos:17.3:r3-s7:*:*:*:*:*:*17.3 r3-s7VulnerableJuniper
cpe:2.3:o:juniper:junos:18.3:-:*:*:*:*:*:*18.3VulnerableJuniper
cpe:2.3:o:juniper:junos:18.3:r1:*:*:*:*:*:*18.3 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:18.3:r1-s1:*:*:*:*:*:*18.3 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:18.3:r1-s2:*:*:*:*:*:*18.3 r1-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:18.3:r1-s3:*:*:*:*:*:*18.3 r1-s3VulnerableJuniper
cpe:2.3:o:juniper:junos:18.3:r1-s5:*:*:*:*:*:*18.3 r1-s5VulnerableJuniper
cpe:2.3:o:juniper:junos:18.3:r1-s6:*:*:*:*:*:*18.3 r1-s6VulnerableJuniper
cpe:2.3:o:juniper:junos:18.3:r2:*:*:*:*:*:*18.3 r2VulnerableJuniper
cpe:2.3:o:juniper:junos:18.3:r2-s1:*:*:*:*:*:*18.3 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:18.3:r2-s2:*:*:*:*:*:*18.3 r2-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:18.3:r2-s3:*:*:*:*:*:*18.3 r2-s3VulnerableJuniper
cpe:2.3:o:juniper:junos:18.3:r3:*:*:*:*:*:*18.3 r3VulnerableJuniper
cpe:2.3:o:juniper:junos:18.4:-:*:*:*:*:*:*18.4VulnerableJuniper
cpe:2.3:o:juniper:junos:18.4:r1:*:*:*:*:*:*18.4 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:18.4:r1-s1:*:*:*:*:*:*18.4 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:18.4:r1-s2:*:*:*:*:*:*18.4 r1-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:18.4:r1-s5:*:*:*:*:*:*18.4 r1-s5VulnerableJuniper
cpe:2.3:o:juniper:junos:18.4:r1-s6:*:*:*:*:*:*18.4 r1-s6VulnerableJuniper
cpe:2.3:o:juniper:junos:18.4:r2:*:*:*:*:*:*18.4 r2VulnerableJuniper
cpe:2.3:o:juniper:junos:18.4:r2-s1:*:*:*:*:*:*18.4 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:18.4:r2-s2:*:*:*:*:*:*18.4 r2-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:18.4:r2-s3:*:*:*:*:*:*18.4 r2-s3VulnerableJuniper
cpe:2.3:o:juniper:junos:18.4:r2-s4:*:*:*:*:*:*18.4 r2-s4VulnerableJuniper
cpe:2.3:o:juniper:junos:19.1:-:*:*:*:*:*:*19.1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.1:r1:*:*:*:*:*:*19.1 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.1:r1-s1:*:*:*:*:*:*19.1 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.1:r1-s2:*:*:*:*:*:*19.1 r1-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:19.1:r1-s3:*:*:*:*:*:*19.1 r1-s3VulnerableJuniper
cpe:2.3:o:juniper:junos:19.1:r1-s4:*:*:*:*:*:*19.1 r1-s4VulnerableJuniper
cpe:2.3:o:juniper:junos:19.1:r2:*:*:*:*:*:*19.1 r2VulnerableJuniper
cpe:2.3:o:juniper:junos:19.1:r2-s1:*:*:*:*:*:*19.1 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.2:-:*:*:*:*:*:*19.2VulnerableJuniper
cpe:2.3:o:juniper:junos:19.2:r1:*:*:*:*:*:*19.2 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.2:r1-s1:*:*:*:*:*:*19.2 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.2:r1-s2:*:*:*:*:*:*19.2 r1-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:19.2:r1-s3:*:*:*:*:*:*19.2 r1-s3VulnerableJuniper
cpe:2.3:o:juniper:junos:19.3:-:*:*:*:*:*:*19.3VulnerableJuniper
cpe:2.3:o:juniper:junos:19.3:r1:*:*:*:*:*:*19.3 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.3:r1-s1:*:*:*:*:*:*19.3 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.3:r2:*:*:*:*:*:*19.3 r2VulnerableJuniper
cpe:2.3:o:juniper:junos:19.3:r2-s1:*:*:*:*:*:*19.3 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.3:r2-s2:*:*:*:*:*:*19.3 r2-s2VulnerableJuniper
  • cpe:2.3:o:juniper:junos:17.3:r3-s2:*:*:*:*:*:* Versions 17.3 r3-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:17.3:r3-s3:*:*:*:*:*:* Versions 17.3 r3-s3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:17.3:r3-s4:*:*:*:*:*:* Versions 17.3 r3-s4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:17.3:r3-s7:*:*:*:*:*:* Versions 17.3 r3-s7 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.3:-:*:*:*:*:*:* Versions 18.3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.3:r1:*:*:*:*:*:* Versions 18.3 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.3:r1-s1:*:*:*:*:*:* Versions 18.3 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.3:r1-s2:*:*:*:*:*:* Versions 18.3 r1-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.3:r1-s3:*:*:*:*:*:* Versions 18.3 r1-s3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.3:r1-s5:*:*:*:*:*:* Versions 18.3 r1-s5 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.3:r1-s6:*:*:*:*:*:* Versions 18.3 r1-s6 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.3:r2:*:*:*:*:*:* Versions 18.3 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.3:r2-s1:*:*:*:*:*:* Versions 18.3 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.3:r2-s2:*:*:*:*:*:* Versions 18.3 r2-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.3:r2-s3:*:*:*:*:*:* Versions 18.3 r2-s3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.3:r3:*:*:*:*:*:* Versions 18.3 r3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.4:-:*:*:*:*:*:* Versions 18.4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.4:r1:*:*:*:*:*:* Versions 18.4 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.4:r1-s1:*:*:*:*:*:* Versions 18.4 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.4:r1-s2:*:*:*:*:*:* Versions 18.4 r1-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.4:r1-s5:*:*:*:*:*:* Versions 18.4 r1-s5 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.4:r1-s6:*:*:*:*:*:* Versions 18.4 r1-s6 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.4:r2:*:*:*:*:*:* Versions 18.4 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.4:r2-s1:*:*:*:*:*:* Versions 18.4 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.4:r2-s2:*:*:*:*:*:* Versions 18.4 r2-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.4:r2-s3:*:*:*:*:*:* Versions 18.4 r2-s3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.4:r2-s4:*:*:*:*:*:* Versions 18.4 r2-s4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.1:-:*:*:*:*:*:* Versions 19.1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.1:r1:*:*:*:*:*:* Versions 19.1 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.1:r1-s1:*:*:*:*:*:* Versions 19.1 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.1:r1-s2:*:*:*:*:*:* Versions 19.1 r1-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.1:r1-s3:*:*:*:*:*:* Versions 19.1 r1-s3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.1:r1-s4:*:*:*:*:*:* Versions 19.1 r1-s4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.1:r2:*:*:*:*:*:* Versions 19.1 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.1:r2-s1:*:*:*:*:*:* Versions 19.1 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.2:-:*:*:*:*:*:* Versions 19.2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.2:r1:*:*:*:*:*:* Versions 19.2 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.2:r1-s1:*:*:*:*:*:* Versions 19.2 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.2:r1-s2:*:*:*:*:*:* Versions 19.2 r1-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.2:r1-s3:*:*:*:*:*:* Versions 19.2 r1-s3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.3:-:*:*:*:*:*:* Versions 19.3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.3:r1:*:*:*:*:*:* Versions 19.3 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.3:r1-s1:*:*:*:*:*:* Versions 19.3 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.3:r2:*:*:*:*:*:* Versions 19.3 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.3:r2-s1:*:*:*:*:*:* Versions 19.3 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.3:r2-s2:*:*:*:*:*:* Versions 19.3 r2-s2 Vulnerable ·Juniper

Remediation

  • Fix · CNA Junos OS (Juniper Networks) Fixed in 17.3R3-S8, 18.3R3-S1, 18.4R3, 19.1R3, 19.2R2, 19.3R3
  • Fix · CNA Junos OS (Juniper Networks) Fixed in 17.4, 18.1, 18.2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Juniper Networks Junos OS 17.3R3-S8, 18.3R3-S1 and 4 more versions

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2020-01615 Junos OS: MX Series: Services card might restart due to a race condition when DNS filtering is enabled.Priority LOW 37
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-1660
  2. 2026-10-03 Alias added: GHSA-xcrv-h2x7-7qcc

References

Advisory 1

  • TI-2023-18638 Junos OS: EX and SRX Series: A PHP vulnerability in J-Web allows an unauthenticated to… KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-01585 Out of Cycle Security Advisory: Junos OS: Security vulnerability in J-Web and web based (HTTP/HTTPS) services KEVCVSS 3.1CRITICAL 9.8
  • TI-2015-04610 Assertion failure in ISC BIND named via TKEY queries KEVCVSS 3.1HIGH 7.5
  • TI-2025-15550 Junos OS: An local attacker with shell access can execute arbitrary code KEVCVSS 4.0MEDIUM 6.7
  • TI-2023-18644 Junos OS: SRX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload and download arbitrary files KEVCVSS 3.1MEDIUM 5.3
  • TI-2023-18640 Junos OS: EX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload arbitrary files KEVCVSS 3.1MEDIUM 5.3
See all 792 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences