{"id":"CVE-2023-36838","aliases":["EUVD-2023-40758","GHSA-xfjj-5jcc-72cx"],"status":"published","title":"Junos OS: SRX Series: A flowd core occurs when running a low privileged CLI command","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.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00184,"percentile":0.08018,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2023-07-14T16:26:24Z","modified":"2026-06-17T06:07:11Z","products":[{"vendor":"juniper","product":"junos"},{"vendor":"juniper networks","product":"junos os"}],"references":[{"url":"https://supportportal.juniper.net/JSA71645","tags":["x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-36838"},{"url":"https://github.com/advisories/GHSA-xfjj-5jcc-72cx"}],"sources":{"cve":[{"id":"CVE-2023-36838","title":"Junos OS: SRX Series: A flowd core occurs when running a low privileged CLI command","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.\n","status":"published","published":"2023-07-14T16:26:24.554Z","modified":"2024-10-22T14:31:56.652Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:35:28.218693Z"}],"euvd":[{"id":"EUVD-2023-40758","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.\n","status":"published","published":"2023-07-14T16:26:24Z","modified":"2024-10-22T14:31:56Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T00:05:22.720016Z"}],"ghsa":[{"id":"GHSA-xfjj-5jcc-72cx","title":"An Out-of-bounds Read vulnerability in the flow processing daemon (flowd) of Juniper Networks...","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.\n","status":"published","published":"2023-07-14T18:31:03Z","modified":"2024-04-04T06:08:41Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:56:39.852376Z"}],"nvd":[{"id":"CVE-2023-36838","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.\n","status":"published","published":"2023-07-14T17:15:09.21Z","modified":"2026-06-17T06:07:11.457Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:08:17.044696Z"}]}}