{"id":"CVE-2017-7902","aliases":["EUVD-2017-16873","GHSA-r727-5v4m-6fx7"],"status":"published","title":"A \"Reusing a Nonce, Key Pair in Encryption\" issue was discovered in Rockwell Automation Allen...","description":"A \"Reusing a Nonce, Key Pair in Encryption\" issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 programmable-logic controllers 1763-L16AWA, Series A and B, Version 16.00 and prior versions; 1763-L16BBB, Series A and B, Version 16.00 and prior versions; 1763-L16BWA, Series A and B, Version 16.00 and prior versions; and 1763-L16DWD, Series A and B, Version 16.00 and prior versions and Allen-Bradley MicroLogix 1400 programmable logic controllers 1766-L32AWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWAA, Series A and B, Version 16.00 and prior versions; 1766-L32BXB, Series A and B, Version 16.00 and prior versions; 1766-L32BXBA, Series A and B, Version 16.00 and prior versions; and 1766-L32AWAA, Series A and B, Version 16.00 and prior versions. The affected product reuses nonces, which may allow an attacker to capture and replay a valid request until the nonce is changed.","severity":{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02559,"percentile":0.85191,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-323","CWE-330"],"published":"2017-06-30T02:35:00Z","modified":"2026-06-17T01:25:25Z","products":[{"vendor":"rockwellautomation","product":"1763-l16awa_series_a"},{"vendor":"rockwellautomation","product":"1763-l16awa_series_b"},{"vendor":"rockwellautomation","product":"1763-l16bbb_series_a"},{"vendor":"rockwellautomation","product":"1763-l16bbb_series_b"},{"vendor":"rockwellautomation","product":"1763-l16bwa_series_a"},{"vendor":"rockwellautomation","product":"1763-l16bwa_series_b"},{"vendor":"rockwellautomation","product":"1763-l16dwd_series_a"},{"vendor":"rockwellautomation","product":"1763-l16dwd_series_b"},{"vendor":"rockwellautomation","product":"1766-l32awa_series_a"},{"vendor":"rockwellautomation","product":"1766-l32awa_series_b"},{"vendor":"rockwellautomation","product":"1766-l32awaa_series_a"},{"vendor":"rockwellautomation","product":"1766-l32awaa_series_b"},{"vendor":"rockwellautomation","product":"1766-l32bwa_series_a"},{"vendor":"rockwellautomation","product":"1766-l32bwa_series_b"},{"vendor":"rockwellautomation","product":"1766-l32bwaa_series_a"},{"vendor":"rockwellautomation","product":"1766-l32bwaa_series_b"},{"vendor":"rockwellautomation","product":"1766-l32bxb_series_a"},{"vendor":"rockwellautomation","product":"1766-l32bxb_series_b"},{"vendor":"rockwellautomation","product":"1766-l32bxba_series_a"},{"vendor":"rockwellautomation","product":"1766-l32bxba_series_b"}],"references":[{"url":"http://www.securitytracker.com/id/1038546","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://ics-cert.us-cert.gov/advisories/ICSA-17-115-04","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-7902"},{"url":"https://github.com/advisories/GHSA-r727-5v4m-6fx7"}],"sources":{"cve":[{"id":"CVE-2017-7902","description":"A \"Reusing a Nonce, Key Pair in Encryption\" issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 programmable-logic controllers 1763-L16AWA, Series A and B, Version 16.00 and prior versions; 1763-L16BBB, Series A and B, Version 16.00 and prior versions; 1763-L16BWA, Series A and B, Version 16.00 and prior versions; and 1763-L16DWD, Series A and B, Version 16.00 and prior versions and Allen-Bradley MicroLogix 1400 programmable logic controllers 1766-L32AWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWAA, Series A and B, Version 16.00 and prior versions; 1766-L32BXB, Series A and B, Version 16.00 and prior versions; 1766-L32BXBA, Series A and B, Version 16.00 and prior versions; and 1766-L32AWAA, Series A and B, Version 16.00 and prior versions. The affected product reuses nonces, which may allow an attacker to capture and replay a valid request until the nonce is changed.","status":"published","published":"2017-06-30T02:35:00Z","modified":"2024-08-05T16:19:28.546Z","cwes":["CWE-323"],"updated_at":"2026-11-02T14:33:20.488433Z"}],"euvd":[{"id":"EUVD-2017-16873","description":"A \"Reusing a Nonce, Key Pair in Encryption\" issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 programmable-logic controllers 1763-L16AWA, Series A and B, Version 16.00 and prior versions; 1763-L16BBB, Series A and B, Version 16.00 and prior versions; 1763-L16BWA, Series A and B, Version 16.00 and prior versions; and 1763-L16DWD, Series A and B, Version 16.00 and prior versions and Allen-Bradley MicroLogix 1400 programmable logic controllers 1766-L32AWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWAA, Series A and B, Version 16.00 and prior versions; 1766-L32BXB, Series A and B, Version 16.00 and prior versions; 1766-L32BXBA, Series A and B, Version 16.00 and prior versions; and 1766-L32AWAA, Series A and B, Version 16.00 and prior versions. The affected product reuses nonces, which may allow an attacker to capture and replay a valid request until the nonce is changed.","status":"published","published":"2017-06-30T02:35:00Z","modified":"2024-08-05T16:19:28Z","updated_at":"2026-11-03T02:39:07.019497Z"}],"ghsa":[{"id":"GHSA-r727-5v4m-6fx7","title":"A \"Reusing a Nonce, Key Pair in Encryption\" issue was discovered in Rockwell Automation Allen...","description":"A \"Reusing a Nonce, Key Pair in Encryption\" issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 programmable-logic controllers 1763-L16AWA, Series A and B, Version 16.00 and prior versions; 1763-L16BBB, Series A and B, Version 16.00 and prior versions; 1763-L16BWA, Series A and B, Version 16.00 and prior versions; and 1763-L16DWD, Series A and B, Version 16.00 and prior versions and Allen-Bradley MicroLogix 1400 programmable logic controllers 1766-L32AWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWAA, Series A and B, Version 16.00 and prior versions; 1766-L32BXB, Series A and B, Version 16.00 and prior versions; 1766-L32BXBA, Series A and B, Version 16.00 and prior versions; and 1766-L32AWAA, Series A and B, Version 16.00 and prior versions. The affected product reuses nonces, which may allow an attacker to capture and replay a valid request until the nonce is changed.","status":"published","published":"2022-05-13T01:36:16Z","modified":"2025-04-20T03:40:47Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-323","CWE-330"],"updated_at":"2026-11-02T15:01:48.455381Z"}],"nvd":[{"id":"CVE-2017-7902","description":"A \"Reusing a Nonce, Key Pair in Encryption\" issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 programmable-logic controllers 1763-L16AWA, Series A and B, Version 16.00 and prior versions; 1763-L16BBB, Series A and B, Version 16.00 and prior versions; 1763-L16BWA, Series A and B, Version 16.00 and prior versions; and 1763-L16DWD, Series A and B, Version 16.00 and prior versions and Allen-Bradley MicroLogix 1400 programmable logic controllers 1766-L32AWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWAA, Series A and B, Version 16.00 and prior versions; 1766-L32BXB, Series A and B, Version 16.00 and prior versions; 1766-L32BXBA, Series A and B, Version 16.00 and prior versions; and 1766-L32AWAA, Series A and B, Version 16.00 and prior versions. The affected product reuses nonces, which may allow an attacker to capture and replay a valid request until the nonce is changed.","status":"published","published":"2017-06-30T03:29:00.827Z","modified":"2026-06-17T01:25:25.78Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-323","CWE-330"],"updated_at":"2026-11-02T14:03:51.893212Z"}]}}