CVE-2020-1900

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Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2020-1900
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-1900.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-1900
Downstream
Published
2021-03-11T01:15:14.490Z
Modified
2026-07-08T20:30:44.984469Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

When unserializing an object with dynamic properties HHVM needs to pre-reserve the full size of the dynamic property array before inserting anything into it. Otherwise the array might resize, invalidating previously stored references. This pre-reservation was not occurring in HHVM prior to v4.32.3, between versions 4.33.0 and 4.56.0, 4.57.0, 4.58.0, 4.58.1, 4.59.0, 4.60.0, 4.61.0, 4.62.0.

References

Affected packages

Git / github.com/facebook/hhvm

Affected ranges

Type
GIT
Repo
https://github.com/facebook/hhvm
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
d6af4b525b31c96526b2508642d58dbf5c7d496c
Introduced
8df1dd7ead93f50388145dd8d7734a69204b50a7
Fixed
55dc2e1650c1e79e67b7f0ef20e51cd2d504a4bb
Introduced
ce87598e3c65a922a6e25c7119e2446f1fa6a4b6
Last affected
2fe7d70e6da93772c770dee950542cac80b5bc2f
Fixed
c1c4bb0cf9e076aafaf4ff3515556ef9faf906f3
Database specific 
{
    "cpe": [
        "cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:*",
        "cpe:2.3:a:facebook:hhvm:4.57.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:facebook:hhvm:4.58.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:facebook:hhvm:4.58.1:*:*:*:*:*:*:*",
        "cpe:2.3:a:facebook:hhvm:4.59.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:facebook:hhvm:4.60.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:facebook:hhvm:4.61.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:facebook:hhvm:4.62.0:*:*:*:*:*:*:*"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "4.32.3"
        },
        {
            "introduced": "4.33.0"
        },
        {
            "fixed": "4.56.1"
        },
        {
            "introduced": "4.57.0"
        },
        {
            "last_affected": "4.57.0"
        },
        {
            "introduced": "4.58.0"
        },
        {
            "last_affected": "4.58.0"
        },
        {
            "introduced": "4.58.1"
        },
        {
            "last_affected": "4.58.1"
        },
        {
            "introduced": "4.59.0"
        },
        {
            "last_affected": "4.59.0"
        },
        {
            "introduced": "4.60.0"
        },
        {
            "last_affected": "4.60.0"
        },
        {
            "introduced": "4.61.0"
        },
        {
            "last_affected": "4.61.0"
        },
        {
            "introduced": "4.62.0"
        },
        {
            "last_affected": "4.62.0"
        }
    ],
    "source": [
        "CPE_RANGE",
        "CPE_STRING",
        "REFERENCES"
    ]
}

Affected versions

4.*
4.57.0
4.58.0
4.58.1
4.59.0
4.60.0
4.61.0
4.62.0
HHVM-4.*
HHVM-4.32.0
HHVM-4.32.1
HHVM-4.32.2
HHVM-4.56.0
HHVM-4.62.0
HPHP-2.*
HPHP-2.1.0
gcc-4.*
gcc-4.6
nightly-2019.*
nightly-2019.03.28
nightly-2019.03.29
nightly-2019.03.30
nightly-2019.03.31
nightly-2019.04.01
nightly-2019.04.02
nightly-2019.04.03
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nightly-2019.04.08
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nightly-2019.04.12
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nightly-2019.04.28
nightly-2019.04.29
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nightly-2019.05.01
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nightly-2019.11.30
nightly-2019.12.01
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nightly-2019.12.25
nightly-2019.12.26
nightly-2019.12.27
nightly-2019.12.28
nightly-2019.12.29
nightly-2019.12.30
nightly-2019.12.31
nightly-2020.*
nightly-2020.01.01
nightly-2020.01.02
nightly-2020.01.03
nightly-2020.01.04
nightly-2020.01.05
nightly-2020.01.06
nightly-2020.01.07
nightly-2020.01.08
nightly-2020.01.09
nightly-2020.01.10
nightly-2020.01.11
nightly-2020.01.12
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nightly-2020.01.14
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nightly-2020.01.24
nightly-2020.01.25
nightly-2020.01.26
nightly-2020.01.27
nightly-2020.01.28
nightly-2020.01.29
nightly-2020.01.30
nightly-2020.01.31
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nightly-2020.02.29
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nightly-2020.03.19
nightly-2020.03.20
nightly-2020.03.21
nightly-2020.03.22
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nightly-2020.03.24
nightly-2020.03.25
nightly-2020.03.26
nightly-2020.03.27
nightly-2020.03.28
nightly-2020.03.29
nightly-2020.03.30
nightly-2020.03.31
nightly-2020.04.01
nightly-2020.04.02
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nightly-2020.04.21
nightly-2020.04.22
nightly-2020.04.23
nightly-2020.04.24
nightly-2020.04.25
nightly-2020.04.26
nightly-2020.04.27
nightly-2020.04.28
nightly-2020.04.29
nightly-2020.04.30
nightly-2020.05.01
nightly-2020.05.02
nightly-2020.05.03
nightly-2020.05.04
nightly-2020.05.05
nightly-2020.05.06
nightly-2020.05.07
nightly-2020.05.08
nightly-2020.05.09
nightly-2020.05.10
nightly-2020.05.11
nightly-2020.05.12
nightly-2020.05.13
nightly-2020.05.14
nightly-2020.05.15
nightly-2020.05.16
nightly-2020.05.17
nightly-2020.05.18
nightly-2020.05.19
nightly-2020.05.20
nightly-2020.05.21
nightly-2020.05.22
nightly-2020.05.23
nightly-2020.05.24
nightly-2020.05.25
nightly-2020.05.26
nightly-2020.05.27
nightly-2020.05.28
nightly-2020.05.29
nightly-2020.05.30
nightly-2020.05.31
nightly-2020.06.01
nightly-2020.06.02
nightly-2020.06.03
nightly-2020.06.04
nightly-2020.06.05
nightly-2020.06.06
nightly-2020.06.07
nightly-2020.06.08
nightly-2020.06.09
nightly-2020.06.10
nightly-2020.06.11
nightly-2020.06.12
nightly-2020.06.13
nightly-2020.06.14
nightly-2020.06.15
nightly-2020.06.16
nightly-2020.06.17
nightly-2020.06.18
nightly-2020.06.19
nightly-2020.06.20
nightly-2020.06.21
nightly-2020.06.22
nightly-2020.06.23
nightly-2020.06.24
nightly-2020.06.25
nightly-2020.06.26
nightly-2020.06.27
nightly-2020.06.28
nightly-2020.06.29
nightly-2020.06.30
Other
pre-hhvm
src-hphp

Database specific

vanir_signatures 
[
    {
        "source": "https://github.com/facebook/hhvm/commit/c1c4bb0cf9e076aafaf4ff3515556ef9faf906f3",
        "signature_version": "v1",
        "signature_type": "Line",
        "digest": {
            "line_hashes": [
                "15087195484119549554939185744270694969",
                "247740747057664256062925961828700856466",
                "5649611835980604045452791483973726846"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "id": "CVE-2020-1900-12916571",
        "target": {
            "file": "hphp/runtime/base/variable-unserializer.cpp"
        }
    },
    {
        "source": "https://github.com/facebook/hhvm/commit/c1c4bb0cf9e076aafaf4ff3515556ef9faf906f3",
        "signature_version": "v1",
        "signature_type": "Function",
        "digest": {
            "function_hash": "150732268746904783890200202889608657611",
            "length": 931.0
        },
        "deprecated": false,
        "id": "CVE-2020-1900-5aecfeb3",
        "target": {
            "function": "VariableUnserializer::unserializeProp",
            "file": "hphp/runtime/base/variable-unserializer.cpp"
        }
    },
    {
        "source": "https://github.com/facebook/hhvm/commit/c1c4bb0cf9e076aafaf4ff3515556ef9faf906f3",
        "signature_version": "v1",
        "signature_type": "Line",
        "digest": {
            "line_hashes": [
                "319370469949607528258900883936558130478",
                "19056843371057609482005153843118411412",
                "224510060117883053613959646770243998371"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "id": "CVE-2020-1900-5bb7a3f3",
        "target": {
            "file": "hphp/runtime/base/object-data.cpp"
        }
    },
    {
        "source": "https://github.com/facebook/hhvm/commit/55dc2e1650c1e79e67b7f0ef20e51cd2d504a4bb",
        "signature_version": "v1",
        "signature_type": "Line",
        "digest": {
            "line_hashes": [
                "331473762518125757472384839031571060902",
                "4158620335537989919269120992316136210",
                "37536044244405383633242229082848527784",
                "140335216194151808759673220052749435881"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "id": "CVE-2020-1900-b7606651",
        "target": {
            "file": "hphp/runtime/version.h"
        }
    },
    {
        "source": "https://github.com/facebook/hhvm/commit/c1c4bb0cf9e076aafaf4ff3515556ef9faf906f3",
        "signature_version": "v1",
        "signature_type": "Function",
        "digest": {
            "function_hash": "301093375172016626895894563153915036256",
            "length": 202.0
        },
        "deprecated": false,
        "id": "CVE-2020-1900-ba56ca6b",
        "target": {
            "function": "ObjectData::reserveProperties",
            "file": "hphp/runtime/base/object-data.cpp"
        }
    },
    {
        "source": "https://github.com/facebook/hhvm/commit/d6af4b525b31c96526b2508642d58dbf5c7d496c",
        "signature_version": "v1",
        "signature_type": "Line",
        "digest": {
            "line_hashes": [
                "286093828909174357221555418457755310879",
                "96311019219661911020751373701839576672",
                "281574740350394436842520560909858709910",
                "140335216194151808759673220052749435881"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "id": "CVE-2020-1900-e22db0a3",
        "target": {
            "file": "hphp/runtime/version.h"
        }
    }
]
vanir_signatures_modified 
"2026-07-08T20:30:44Z"
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-1900.json"