{"id":"CVE-2023-36843","aliases":["EUVD-2023-40763","GHSA-f8h4-8cx8-j35m"],"status":"published","title":"Junos OS: SRX Series: The PFE will crash on receiving malformed SSL traffic when Sky ATP is enabled","description":"An Improper Handling of Inconsistent Special Elements vulnerability in the Junos Services Framework (jsf) module of Juniper Networks Junos OS allows an unauthenticated network based attacker to cause a crash in the Packet Forwarding Engine (pfe) and thereby resulting in a Denial of Service (DoS).\n\nUpon receiving malformed SSL traffic, the PFE crashes. A manual restart will be needed to recover the device.\n\nThis issue only affects devices with Juniper Networks Advanced Threat Prevention (ATP) Cloud enabled with Encrypted Traffic Insights (configured via ‘security-metadata-streaming policy’).\n\nThis issue affects Juniper Networks Junos OS:\n\n\n\n  *  All versions prior to 20.4R3-S8, 20.4R3-S9;\n  *  21.1 version 21.1R1 and later versions;\n  *  21.2 versions prior to 21.2R3-S6;\n  *  21.3 versions prior to 21.3R3-S5;\n  *  21.4 versions prior to 21.4R3-S5;\n  *  22.1 versions prior to 22.1R3-S4;\n  *  22.2 versions prior to 22.2R3-S2;\n  *  22.3 versions prior to 22.3R2-S2, 22.3R3;\n  *  22.4 versions prior to 22.4R2-S1, 22.4R3;","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00654,"percentile":0.51689,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-168"],"published":"2023-10-12T22:58:49Z","modified":"2026-06-17T06:07:12Z","products":[{"vendor":"juniper","product":"junos"},{"vendor":"juniper networks","product":"junos os"},{"vendor":"juniper_networks","product":"junos_os"}],"references":[{"url":"https://supportportal.juniper.net/JSA73174","tags":["vendor-advisory","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-36843"},{"url":"https://github.com/advisories/GHSA-f8h4-8cx8-j35m"}],"sources":{"cve":[{"id":"CVE-2023-36843","title":"Junos OS: SRX Series: The PFE will crash on receiving malformed SSL traffic when Sky ATP is enabled","description":"\nAn Improper Handling of Inconsistent Special Elements vulnerability in the Junos Services Framework (jsf) module of Juniper Networks Junos OS allows an unauthenticated network based attacker to cause a crash in the Packet Forwarding Engine (pfe) and thereby resulting in a Denial of Service (DoS).\n\nUpon receiving malformed SSL traffic, the PFE crashes. A manual restart will be needed to recover the device.\n\nThis issue only affects devices with Juniper Networks Advanced Threat Prevention (ATP) Cloud enabled with Encrypted Traffic Insights (configured via ‘security-metadata-streaming policy’).\n\nThis issue affects Juniper Networks Junos OS:\n\n\n\n  *  All versions prior to 20.4R3-S8, 20.4R3-S9;\n  *  21.1 version 21.1R1 and later versions;\n  *  21.2 versions prior to 21.2R3-S6;\n  *  21.3 versions prior to 21.3R3-S5;\n  *  21.4 versions prior to 21.4R3-S5;\n  *  22.1 versions prior to 22.1R3-S4;\n  *  22.2 versions prior to 22.2R3-S2;\n  *  22.3 versions prior to 22.3R2-S2, 22.3R3;\n  *  22.4 versions prior to 22.4R2-S1, 22.4R3;\n\n\n\n\n\n\n","status":"published","published":"2023-10-12T22:58:49.192Z","modified":"2024-09-18T17:53:30.073Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-168","CWE-168"],"updated_at":"2026-11-02T14:35:27.810438Z"}],"euvd":[{"id":"EUVD-2023-40763","description":"\nAn Improper Handling of Inconsistent Special Elements vulnerability in the Junos Services Framework (jsf) module of Juniper Networks Junos OS allows an unauthenticated network based attacker to cause a crash in the Packet Forwarding Engine (pfe) and thereby resulting in a Denial of Service (DoS).\n\nUpon receiving malformed SSL traffic, the PFE crashes. A manual restart will be needed to recover the device.\n\nThis issue only affects devices with Juniper Networks Advanced Threat Prevention (ATP) Cloud enabled with Encrypted Traffic Insights (configured via ‘security-metadata-streaming policy’).\n\nThis issue affects Juniper Networks Junos OS:\n\n\n\n  *  All versions prior to 20.4R3-S8, 20.4R3-S9;\n  *  21.1 version 21.1R1 and later versions;\n  *  21.2 versions prior to 21.2R3-S6;\n  *  21.3 versions prior to 21.3R3-S5;\n  *  21.4 versions prior to 21.4R3-S5;\n  *  22.1 versions prior to 22.1R3-S4;\n  *  22.2 versions prior to 22.2R3-S2;\n  *  22.3 versions prior to 22.3R2-S2, 22.3R3;\n  *  22.4 versions prior to 22.4R2-S1, 22.4R3;\n\n\n\n\n\n\n","status":"published","published":"2023-10-12T22:58:49Z","modified":"2024-09-18T17:53:30Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T00:28:20.979111Z"}],"ghsa":[{"id":"GHSA-f8h4-8cx8-j35m","title":"\nAn Improper Handling of Inconsistent Special Elements vulnerability in the Junos Services...","description":"\nAn Improper Handling of Inconsistent Special Elements vulnerability in the Junos Services Framework (jsf) module of Juniper Networks Junos OS allows an unauthenticated network based attacker to cause a crash in the Packet Forwarding Engine (pfe) and thereby resulting in a Denial of Service (DoS).\n\nUpon receiving malformed SSL traffic, the PFE crashes. A manual restart will be needed to recover the device.\n\nThis issue only affects devices with Juniper Networks Advanced Threat Prevention (ATP) Cloud enabled with Encrypted Traffic Insights (configured via ‘security-metadata-streaming policy’).\n\nThis issue affects Juniper Networks Junos OS:\n\n\n\n  *  All versions prior to 20.4R3-S8, 20.4R3-S9;\n  *  21.1 version 21.1R1 and later versions;\n  *  21.2 versions prior to 21.2R3-S6;\n  *  21.3 versions prior to 21.3R3-S5;\n  *  21.4 versions prior to 21.4R3-S5;\n  *  22.1 versions prior to 22.1R3-S4;\n  *  22.2 versions prior to 22.2R3-S2;\n  *  22.3 versions prior to 22.3R2-S2, 22.3R3;\n  *  22.4 versions prior to 22.4R2-S1, 22.4R3;\n\n\n\n\n\n\n","status":"published","published":"2023-10-13T00:30:18Z","modified":"2024-04-04T08:36:29Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-168"],"updated_at":"2026-11-02T14:56:59.652212Z"}],"nvd":[{"id":"CVE-2023-36843","description":"\nAn Improper Handling of Inconsistent Special Elements vulnerability in the Junos Services Framework (jsf) module of Juniper Networks Junos OS allows an unauthenticated network based attacker to cause a crash in the Packet Forwarding Engine (pfe) and thereby resulting in a Denial of Service (DoS).\n\nUpon receiving malformed SSL traffic, the PFE crashes. A manual restart will be needed to recover the device.\n\nThis issue only affects devices with Juniper Networks Advanced Threat Prevention (ATP) Cloud enabled with Encrypted Traffic Insights (configured via ‘security-metadata-streaming policy’).\n\nThis issue affects Juniper Networks Junos OS:\n\n\n\n  *  All versions prior to 20.4R3-S8, 20.4R3-S9;\n  *  21.1 version 21.1R1 and later versions;\n  *  21.2 versions prior to 21.2R3-S6;\n  *  21.3 versions prior to 21.3R3-S5;\n  *  21.4 versions prior to 21.4R3-S5;\n  *  22.1 versions prior to 22.1R3-S4;\n  *  22.2 versions prior to 22.2R3-S2;\n  *  22.3 versions prior to 22.3R2-S2, 22.3R3;\n  *  22.4 versions prior to 22.4R2-S1, 22.4R3;\n\n\n\n\n\n\n","status":"published","published":"2023-10-12T23:15:11.053Z","modified":"2026-06-17T06:07:12.397Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-168"],"updated_at":"2026-11-02T14:08:37.83429Z"}]}}