CVE-2020-8936

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Source
https://nvd.nist.gov/vuln/detail/CVE-2020-8936
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8936.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-8936
Published
2020-12-15T15:15:13Z
Modified
2025-10-21T05:57:29.356087Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
[none]
Details

An arbitrary memory overwrite vulnerability in Asylo versions up to 0.6.0 allows an attacker to make a host call to UntrustedCall. UntrustedCall failed to validate the buffer range within sgx_params and allowed the host to return a pointer that was an address within the enclave memory. This allowed an attacker to read memory values from within the enclave.

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
83036fd841d33baa7e039f842d131aa7881fdcc2

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
buildenv-v0.6.0

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
v0.6.0

Database specific

vanir_signatures

[
    {
        "source": "https://github.com/google/asylo/commit/83036fd841d33baa7e039f842d131aa7881fdcc2",
        "target": {
            "file": "asylo/platform/primitives/sgx/trusted_sgx.cc"
        },
        "deprecated": false,
        "signature_version": "v1",
        "id": "CVE-2020-8936-0ce685a3",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "249849551134861197772701074161590743093",
                "288542086381598857212057362218517107524",
                "229767768765419279177818205328034353549",
                "298254167630889455123360114835833751118"
            ]
        },
        "signature_type": "Line"
    },
    {
        "source": "https://github.com/google/asylo/commit/83036fd841d33baa7e039f842d131aa7881fdcc2",
        "target": {
            "function": "TrustedPrimitives::UntrustedCall",
            "file": "asylo/platform/primitives/sgx/trusted_sgx.cc"
        },
        "deprecated": false,
        "signature_version": "v1",
        "id": "CVE-2020-8936-63b825ab",
        "digest": {
            "length": 1047.0,
            "function_hash": "63509712737912869867927962631554045034"
        },
        "signature_type": "Function"
    }
]