{"cve":"CVE-2023-36838","nvd":{"published":"2023-07-14T17:15:09.210","modified":"2026-06-17T06:07:11.457","status":"Modified","description":"An Out-of-bounds Read vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SRX Series allows a local, authenticated attacker with low privileges, to cause a Denial of Service (DoS).\n\nIf a low privileged user executes a specific CLI command, flowd which is responsible for traffic forwarding in SRX crashes and generates a core dump. This will cause temporary traffic interruption until the flowd process is restarted automatically. Continued execution of this command will lead to a sustained DoS.\n\nThis issue affects Juniper Networks Junos OS on SRX Series:\nAll versions prior to 20.2R3-S7;\n20.3 version 20.3R1 and later versions;\n20.4 versions prior to 20.4R3-S6;\n21.1 versions prior to 21.1R3-S5;\n21.2 versions prior to 21.2R3-S4;\n21.3 versions prior to 21.3R3-S4;\n21.4 versions prior to 21.4R3-S3;\n22.1 versions prior to 22.1R3-S1;\n22.2 versions prior to 22.2R3;\n22.3 versions prior to 22.3R2;\n22.4 versions prior to 22.4R1-S1, 22.4R2.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-125"],"references":["https://supportportal.juniper.net/JSA71645","https://supportportal.juniper.net/JSA71645"],"products":["juniper:junos"],"source":"nvd","synced_at":"2026-10-19T21:38:35.729974749+00:00"},"epss":{"cve":"CVE-2023-36838","score":0.00184,"percentile":0.07997,"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."]}