CVE-2020-1912

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Source
https://nvd.nist.gov/vuln/detail/CVE-2020-1912
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-1912.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-1912
Aliases
Published
2020-09-09T19:15:20.850Z
Modified
2025-11-20T11:19:23.126735Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

An out-of-bounds read/write vulnerability when executing lazily compiled inner generator functions in Facebook Hermes prior to commit 091835377369c8fd5917d9b87acffa721ad2a168 allows attackers to potentially execute arbitrary code via crafted JavaScript. Note that this is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. Hence, most React Native applications are not affected.

References

Affected packages

Git / github.com/facebook/hermes

Affected ranges

Type
GIT
Repo
https://github.com/facebook/hermes
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
091835377369c8fd5917d9b87acffa721ad2a168

Affected versions

v0.*

v0.1.0
v0.1.1
v0.2.1
v0.3.0
v0.4.0
v0.5.0
v0.6.0

Database specific

vanir_signatures

[
    {
        "signature_type": "Function",
        "source": "https://github.com/facebook/hermes/commit/091835377369c8fd5917d9b87acffa721ad2a168",
        "deprecated": false,
        "target": {
            "file": "lib/IRGen/ESTreeIRGen.cpp",
            "function": "ESTreeIRGen::doLazyFunction"
        },
        "id": "CVE-2020-1912-1a248a41",
        "digest": {
            "function_hash": "166117337606691127376896012638914962402",
            "length": 1127.0
        },
        "signature_version": "v1"
    },
    {
        "signature_type": "Function",
        "source": "https://github.com/facebook/hermes/commit/091835377369c8fd5917d9b87acffa721ad2a168",
        "deprecated": false,
        "target": {
            "file": "lib/BCGen/HBC/BytecodeGenerator.cpp",
            "function": "BytecodeModuleGenerator::generate"
        },
        "id": "CVE-2020-1912-23e65117",
        "digest": {
            "function_hash": "141433903422062908392870224668616591625",
            "length": 3223.0
        },
        "signature_version": "v1"
    },
    {
        "signature_type": "Line",
        "source": "https://github.com/facebook/hermes/commit/091835377369c8fd5917d9b87acffa721ad2a168",
        "deprecated": false,
        "target": {
            "file": "lib/IRGen/ESTreeIRGen-func.cpp"
        },
        "id": "CVE-2020-1912-4ec2a93e",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "68947359869273260695952235856958639047",
                "310262731518963030849177473901907694982",
                "43655176662467176673572812232337830164",
                "251975857109927295130916986511114831995",
                "267392027748459512215805486003428925381",
                "14869591982245817008383418568817739486",
                "25011000255393205312587106221272530406",
                "76617029384894588801177634287181038274",
                "302810129154842953319122505398617295679",
                "290781533802588139012893337737251953884",
                "309741251300914982749835247732214238943",
                "304745648669413726604737901917541719575",
                "197290495346865817946198223729531450493",
                "164628642321663572232346492589147618151"
            ]
        },
        "signature_version": "v1"
    },
    {
        "signature_type": "Line",
        "source": "https://github.com/facebook/hermes/commit/091835377369c8fd5917d9b87acffa721ad2a168",
        "deprecated": false,
        "target": {
            "file": "include/hermes/IRGen/IRGen.h"
        },
        "id": "CVE-2020-1912-6fcf5aaf",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "118449173113696205520853759435422956610",
                "232680986558581044059541722654142378307",
                "336810655257276162490605970511824891267"
            ]
        },
        "signature_version": "v1"
    },
    {
        "signature_type": "Line",
        "source": "https://github.com/facebook/hermes/commit/091835377369c8fd5917d9b87acffa721ad2a168",
        "deprecated": false,
        "target": {
            "file": "lib/IRGen/ESTreeIRGen.cpp"
        },
        "id": "CVE-2020-1912-93509744",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "19906978767362067285113684163218152133",
                "175595626256065738182228936290520385548",
                "12935631989303753987380467402787289329",
                "148815064741235597976782175301514007803"
            ]
        },
        "signature_version": "v1"
    },
    {
        "signature_type": "Function",
        "source": "https://github.com/facebook/hermes/commit/091835377369c8fd5917d9b87acffa721ad2a168",
        "deprecated": false,
        "target": {
            "file": "lib/IRGen/ESTreeIRGen-func.cpp",
            "function": "ESTreeIRGen::genES5Function"
        },
        "id": "CVE-2020-1912-a6c1d01d",
        "digest": {
            "function_hash": "15381551074468224391172303248986894624",
            "length": 2298.0
        },
        "signature_version": "v1"
    },
    {
        "signature_type": "Line",
        "source": "https://github.com/facebook/hermes/commit/091835377369c8fd5917d9b87acffa721ad2a168",
        "deprecated": false,
        "target": {
            "file": "include/hermes/IR/IR.h"
        },
        "id": "CVE-2020-1912-c538ddc8",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "10876135637255643184975339061925308991",
                "322220919901056191015063488949676221856",
                "303417822709648059539571908123264092948",
                "203289460270659300369657686157979660466"
            ]
        },
        "signature_version": "v1"
    },
    {
        "signature_type": "Line",
        "source": "https://github.com/facebook/hermes/commit/091835377369c8fd5917d9b87acffa721ad2a168",
        "deprecated": false,
        "target": {
            "file": "lib/BCGen/HBC/BytecodeGenerator.cpp"
        },
        "id": "CVE-2020-1912-cd3bb58f",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "127463815399244171356330020060141584602",
                "205336833909874881979775941571286102428",
                "244584719445244937694542144971470351922",
                "162851663397290344814180789619227158406"
            ]
        },
        "signature_version": "v1"
    },
    {
        "signature_type": "Function",
        "source": "https://github.com/facebook/hermes/commit/091835377369c8fd5917d9b87acffa721ad2a168",
        "deprecated": false,
        "target": {
            "file": "lib/IRGen/ESTreeIRGen-func.cpp",
            "function": "ESTreeIRGen::genGeneratorFunction"
        },
        "id": "CVE-2020-1912-d7df1ce0",
        "digest": {
            "function_hash": "38774911459647130156213830716821810632",
            "length": 840.0
        },
        "signature_version": "v1"
    }
]