CVE-2020-8904

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Source
https://cve.org/CVERecord?id=CVE-2020-8904
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8904.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-8904
Published
2020-08-12T19:15:14Z
Modified
2026-07-08T20:43:35Z
Severity
  • 9.6 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Git / github.com/google/asylo

Affected ranges

Type
GIT
Repo
https://github.com/google/asylo
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
299f804acbb95a612ab7c504d25ab908aa59ae93
Fixed
e582f36ac49ee11a21d23ad6a30c333092e0a94e
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:google:asylo:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.6.0"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

buildenv-v0.*
buildenv-v0.2.0
buildenv-v0.2.1
buildenv-v0.2.2
buildenv-v0.3.0
buildenv-v0.3.1
buildenv-v0.3.2
buildenv-v0.3.3
buildenv-v0.3.4
buildenv-v0.4.0
buildenv-v0.4.1
buildenv-v0.5.0
buildenv-v0.5.1
buildenv-v0.5.2
buildenv-v0.5.3
v0.*
v0.2.0
v0.2.1
v0.2.2
v0.3.0
v0.3.1
v0.3.2
v0.3.3
v0.3.4
v0.3.4.1
v0.4.0
v0.4.1
v0.5.0
v0.5.1
v0.5.2
v0.5.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8904.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "232311576742852937528951488602353048356",
                "239219903741322872622410301507378039653",
                "98100078975615401589899147513071682994",
                "264262808374229173759127247203979683848",
                "168884572296058466466796399177656558076",
                "194816803327240949914791498851530735736"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2020-8904-231c0404",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/google/asylo/commit/e582f36ac49ee11a21d23ad6a30c333092e0a94e",
        "target": {
            "file": "asylo/platform/primitives/sgx/ecalls.cc"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "206843566668820650509670967168184456061",
                "80156147239961341313323500740088832576",
                "199487815859305689901389025254287933562",
                "164706716403506214144524274119973725632"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2020-8904-6c5c34f2",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/google/asylo/commit/299f804acbb95a612ab7c504d25ab908aa59ae93",
        "target": {
            "file": "asylo/platform/host_call/trusted/host_calls.cc"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "26899445440106890895090757480789185378",
            "length": 575
        },
        "id": "CVE-2020-8904-ce65bfe1",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/google/asylo/commit/e582f36ac49ee11a21d23ad6a30c333092e0a94e",
        "target": {
            "file": "asylo/platform/primitives/sgx/ecalls.cc",
            "function": "ecall_restore"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "14747568182961413266336135363801043561",
            "length": 1020
        },
        "id": "CVE-2020-8904-da74cbf8",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/google/asylo/commit/299f804acbb95a612ab7c504d25ab908aa59ae93",
        "target": {
            "file": "asylo/platform/host_call/trusted/host_calls.cc",
            "function": "enc_untrusted_recvfrom"
        }
    }
]
vanir_signatures_modified 
"2026-07-08T20:43:35Z"