{"id":"CVE-2023-23300","aliases":["EUVD-2023-27400","GHSA-g3r4-4765-9c9c"],"status":"published","title":"The `Toybox.Cryptography.Cipher.initialize` API method in CIQ API version 3.0.0 through 4.1.7...","description":"The `Toybox.Cryptography.Cipher.initialize` API method in CIQ API version 3.0.0 through 4.1.7 does not validate its parameters, which can result in buffer overflows when copying data. A malicious application could call the API method with specially crafted parameters and hijack the execution of the device's firmware.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01285,"percentile":0.70503,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-120"],"published":"2023-05-23T00:00:00Z","modified":"2026-06-17T05:36:49Z","products":[{"vendor":"garmin","product":"connect-iq"}],"references":[{"url":"https://developer.garmin.com/connect-iq/api-docs/Toybox/Cryptography/Cipher.html#initialize-instance_function","tags":["x_transferred","Product"]},{"url":"https://github.com/anvilsecure/garmin-ciq-app-research/blob/main/advisories/CVE-2023-23300.md","tags":["x_transferred","Exploit"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-23300"},{"url":"https://github.com/advisories/GHSA-g3r4-4765-9c9c"}],"sources":{"cve":[{"id":"CVE-2023-23300","description":"The `Toybox.Cryptography.Cipher.initialize` API method in CIQ API version 3.0.0 through 4.1.7 does not validate its parameters, which can result in buffer overflows when copying data. A malicious application could call the API method with specially crafted parameters and hijack the execution of the device's firmware.","status":"published","published":"2023-05-23T00:00:00Z","modified":"2025-01-21T14:54:57.447Z","updated_at":"2026-11-02T14:35:21.232549Z"}],"euvd":[{"id":"EUVD-2023-27400","description":"The `Toybox.Cryptography.Cipher.initialize` API method in CIQ API version 3.0.0 through 4.1.7 does not validate its parameters, which can result in buffer overflows when copying data. A malicious application could call the API method with specially crafted parameters and hijack the execution of the device's firmware.","status":"published","published":"2023-05-23T00:00:00Z","modified":"2025-01-21T14:54:57Z","updated_at":"2026-11-03T00:04:16.173755Z"}],"ghsa":[{"id":"GHSA-g3r4-4765-9c9c","title":"The `Toybox.Cryptography.Cipher.initialize` API method in CIQ API version 3.0.0 through 4.1.7...","description":"The `Toybox.Cryptography.Cipher.initialize` API method in CIQ API version 3.0.0 through 4.1.7 does not validate its parameters, which can result in buffer overflows when copying data. A malicious application could call the API method with specially crafted parameters and hijack the execution of the device's firmware.","status":"published","published":"2023-05-23T21:30:17Z","modified":"2024-04-04T04:19:03Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:56:22.887174Z"}],"nvd":[{"id":"CVE-2023-23300","description":"The `Toybox.Cryptography.Cipher.initialize` API method in CIQ API version 3.0.0 through 4.1.7 does not validate its parameters, which can result in buffer overflows when copying data. A malicious application could call the API method with specially crafted parameters and hijack the execution of the device's firmware.","status":"published","published":"2023-05-23T20:15:09.38Z","modified":"2026-06-17T05:36:49.167Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:08:03.200773Z"}]}}