{"cve":"CVE-2023-36850","nvd":{"published":"2023-07-14T19:15:09.093","modified":"2026-06-17T06:07:13.787","status":"Modified","description":"An Improper Validation of Specified Index, Position, or Offset in Input vulnerability in the Connectivity Fault Management(CFM) module of Juniper Networks Junos OS on MX Series(except MPC10, MPC11 and LC9600) allows an adjacent attacker on the local broadcast domain to cause a Denial of Service(DoS).\n\nUpon receiving a malformed CFM packet, the MPC crashes. Continued receipt of these packets causes a sustained denial of service. This issue can only be triggered when CFM hasn't been configured.\n\nThis issue affects:\nJuniper Networks Junos OS\nAll versions prior to 19.1R3-S10 on MX Series;\n19.2 versions prior to 19.2R3-S7 on MX Series;\n19.3 versions prior to 19.3R3-S8 on MX Series;\n19.4 versions prior to 19.4R3-S12 on MX Series;\n20.1 version 20.1R1 and later versions on MX Series;\n20.2 versions prior to 20.2R3-S7 on MX Series;\n20.3 version 20.3R1 and later versions on MX Series;\n20.4 versions prior to 20.4R3-S7 on MX Series;\n21.1 versions prior to 21.1R3-S5 on MX Series;\n21.2 versions prior to 21.2R3-S4 on MX Series;\n21.3 versions prior to 21.3R3-S4 on MX Series;\n21.4 versions prior to 21.4R3-S3 on MX Series;\n22.1 versions prior to 22.1R3-S2 on MX Series;\n22.2 versions prior to 22.2R3 on MX Series;\n22.3 versions prior to 22.3R2, 22.3R3 on MX Series;\n22.4 versions prior to 22.4R2 on MX Series.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":6.5},"cwes":["CWE-1285"],"references":["https://supportportal.juniper.net/JSA71661","https://supportportal.juniper.net/JSA71661"],"products":["juniper:junos"],"source":"nvd","synced_at":"2026-10-19T21:38:35.729974749+00:00"},"epss":{"cve":"CVE-2023-36850","score":0.00303,"percentile":0.23122,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}