{"id":"CVE-2020-8904","aliases":["EUVD-2020-29743","GHSA-pc43-829f-g5gr"],"status":"published","title":"Arbitrary trusted memory overwrite vulnerability in Asylo","description":"An arbitrary memory overwrite vulnerability in the trusted memory of Asylo exists in versions prior to 0.6.0. As the ecall_restore function fails to validate the range of the output_len pointer, an attacker can manipulate the tmp_output_len value and write to an arbitrary location in the trusted (enclave) memory. We recommend updating Asylo to version 0.6.0 or later.","severity":{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00232,"percentile":0.14192,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-119","CWE-823"],"published":"2020-08-12T18:20:13Z","modified":"2026-10-20T14:14:06Z","products":[{"vendor":"google","product":"asylo"},{"vendor":"google llc","product":"asylo"}],"references":[{"url":"https://github.com/google/asylo/commit/e582f36ac49ee11a21d23ad6a30c333092e0a94e","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-8904"},{"url":"https://github.com/advisories/GHSA-pc43-829f-g5gr"}],"sources":{"cve":[{"id":"CVE-2020-8904","title":"Arbitrary trusted memory overwrite vulnerability in Asylo","description":"An arbitrary memory overwrite vulnerability in the trusted memory of Asylo exists in versions prior to 0.6.0. As the ecall_restore function fails to validate the range of the output_len pointer, an attacker can manipulate the tmp_output_len value and write to an arbitrary location in the trusted (enclave) memory. We recommend updating Asylo to version 0.6.0 or later.","status":"published","published":"2020-08-12T18:20:13.047Z","modified":"2024-09-16T23:21:07.649Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-823"],"updated_at":"2026-11-02T14:35:50.88562Z"}],"euvd":[{"id":"EUVD-2020-29743","description":"An arbitrary memory overwrite vulnerability in the trusted memory of Asylo exists in versions prior to 0.6.0. As the ecall_restore function fails to validate the range of the output_len pointer, an attacker can manipulate the tmp_output_len value and write to an arbitrary location in the trusted (enclave) memory. We recommend updating Asylo to version 0.6.0 or later.","status":"published","published":"2020-08-12T18:20:13Z","modified":"2024-09-16T23:21:07Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H","level":"medium"}],"updated_at":"2026-11-03T00:54:54.099071Z"}],"ghsa":[{"id":"GHSA-pc43-829f-g5gr","title":"An arbitrary memory overwrite vulnerability in the trusted memory of Asylo exists in versions...","description":"An arbitrary memory overwrite vulnerability in the trusted memory of Asylo exists in versions prior to 0.6.0. As the ecall_restore function fails to validate the range of the output_len pointer, an attacker can manipulate the tmp_output_len value and write to an arbitrary location in the trusted (enclave) memory. We recommend updating Asylo to version 0.6.0 or later.","status":"published","published":"2022-05-24T17:25:27Z","modified":"2023-01-29T05:04:06Z","updated_at":"2026-11-02T14:45:28.498835Z"}],"nvd":[{"id":"CVE-2020-8904","description":"An arbitrary memory overwrite vulnerability in the trusted memory of Asylo exists in versions prior to 0.6.0. As the ecall_restore function fails to validate the range of the output_len pointer, an attacker can manipulate the tmp_output_len value and write to an arbitrary location in the trusted (enclave) memory. We recommend updating Asylo to version 0.6.0 or later.","status":"published","published":"2020-08-12T19:15:14.593Z","modified":"2026-06-17T03:27:09.38Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":9.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":5.5,"vector":"AV:N/AC:L/Au:S/C:N/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-823","CWE-119"],"updated_at":"2026-11-02T14:06:10.994748Z"}],"osv":[{"id":"CVE-2020-8904","description":"An arbitrary memory overwrite vulnerability in the trusted memory of Asylo exists in versions prior to 0.6.0. As the ecall_restore function fails to validate the range of the output_len pointer, an attacker can manipulate the tmp_output_len value and write to an arbitrary location in the trusted (enclave) memory. We recommend updating Asylo to version 0.6.0 or later.","status":"published","published":"2020-08-12T19:15:14.593Z","modified":"2026-10-20T14:14:06.181373212Z","cvss":[{"version":"3.1","score":9.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:17.663289Z"}]}}