{"id":"CVE-2017-3226","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-3226","generatedAt":"2026-10-28T21:28:50.708Z","title":"An attacker with physical access to the device can manipulate the encrypted environment data to include a crafted two-byte sequence which triggers an error in environment variable parsing.","description":"Das U-Boot is a device bootloader that can read its configuration from an AES encrypted file. Devices that make use of Das U-Boot's AES-CBC encryption feature using environment encryption (i.e., setting the configuration parameter CONFIG_ENV_AES=y) read environment variables from disk as the encrypted disk image is processed. An attacker with physical access to the device can manipulate the encrypted environment data to include a crafted two-byte sequence which triggers an error in environment variable parsing. This error condition is improperly handled by Das U-Boot, resulting in an immediate process termination with a debugging message.","published":"2018-07-24T15:29:01.000Z","lastModified":"2026-06-17T01:17:46.000Z","status":"Modified","sourceIdentifier":"cret@cert.org","cvss":{"version":"3.0","score":6.4,"severity":"MEDIUM","vector":"CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-329","CWE-310"],"affected":["denx/u-boot"],"epss":{"score":0.00266,"percentile":0.18445,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.27%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://www.securityfocus.com/bid/100675","tags":["Third Party Advisory","VDB Entry"],"source":"cret@cert.org"},{"url":"https://www.kb.cert.org/vuls/id/166743","tags":["Third Party Advisory","US Government Resource"],"source":"cret@cert.org"},{"url":"http://www.securityfocus.com/bid/100675","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.kb.cert.org/vuls/id/166743","tags":["Third Party Advisory","US Government Resource"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-3226","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}