CVE-2018-6337

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Source
https://cve.org/CVERecord?id=CVE-2018-6337
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-6337.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2018-6337
Published
2018-12-31T22:29:00.247Z
Modified
2026-04-11T08:05:27.371552Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
[none]
Details

folly::secureRandom will re-use a buffer between parent and child processes when fork() is called. That will result in multiple forked children producing repeat (or similar) results. This affects HHVM 3.26 prior to 3.26.3 and the folly library between v2017.12.11.00 and v2018.08.09.00.

References

Affected packages

Git / github.com/facebook/folly

Affected ranges

Type
GIT
Repo
https://github.com/facebook/folly
Events
Introduced
712b8b8de747960ceeceedfd3a18ee23a0c03a80
Last affected
c4fca6d0852bc68b1387c755be7a22710af70cb3
Fixed
8e927ee48b114c8a2f90d0cbd5ac753795a6761f
Database specific 
{
    "versions": [
        {
            "introduced": "2017.12.11.00"
        },
        {
            "last_affected": "2018.08.09.00"
        }
    ]
}
Type
GIT
Repo
https://github.com/facebook/hhvm
Events
Introduced
a20c2a7761b782faf1635dfe2f1f8f0df438196d
Fixed
cea63133cb066ebff74f9fc42789fa2017beab55
Fixed
e2d10a1e32d01f71aaadd81169bcb9ae86c5d6b8
Database specific 
{
    "versions": [
        {
            "introduced": "3.26"
        },
        {
            "fixed": "3.26.3"
        }
    ]
}

Affected versions

HHVM-3.*
HHVM-3.26.0
HHVM-3.26.1
HHVM-3.26.2
v2017.*
v2017.12.11.00
v2017.12.18.00
v2017.12.25.00
v2018.*
v2018.01.01.00
v2018.01.08.00
v2018.01.15.00
v2018.01.22.00
v2018.01.29.00
v2018.02.05.00
v2018.02.12.00
v2018.02.19.00
v2018.02.26.00
v2018.03.05.00
v2018.03.12.00
v2018.03.19.00
v2018.03.26.00
v2018.04.02.00
v2018.04.09.00
v2018.04.16.00
v2018.04.23.00
v2018.04.30.00
v2018.05.07.00
v2018.05.14.00
v2018.05.21.00
v2018.05.28.00
v2018.06.04.00
v2018.06.11.00
v2018.06.18.00
v2018.06.25.00
v2018.07.02.00
v2018.07.09.00
v2018.07.16.00
v2018.07.23.00
v2018.07.30.00
v2018.08.06.00
v2018.08.09.00

Database specific

vanir_signatures_modified 
"2026-04-11T08:05:27Z"
vanir_signatures 
[
    {
        "id": "CVE-2018-6337-26c63d9e",
        "target": {
            "file": "folly/Random.cpp",
            "function": "BufferedRandomDevice::BufferedRandomDevice"
        },
        "deprecated": false,
        "digest": {
            "function_hash": "284036517926769522446303472293932871264",
            "length": 167.0
        },
        "signature_type": "Function",
        "source": "https://github.com/facebook/folly/commit/8e927ee48b114c8a2f90d0cbd5ac753795a6761f",
        "signature_version": "v1"
    },
    {
        "id": "CVE-2018-6337-8d3baadc",
        "target": {
            "file": "folly/Random.cpp"
        },
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "177920330538644327192225453200305065783",
                "59911639472083442187456794245162808999",
                "65172725879389982502094016348740295630",
                "17990193584615700481737216549983378364",
                "209095503057375019683009475243350527423",
                "296410358608657755139750410745821126905",
                "6183588544461503112388437451448205621",
                "235905810367433042539041352614098937893",
                "13633877825802383340203296441577109962",
                "34706653758255140459594012130281298023",
                "323743310232915005554048423781952476189",
                "106311966400258842219023665560878942543",
                "230258836968319331137014607436219812468",
                "20826410772747688904839131406196838226",
                "117656596208525043926138988524382117691"
            ],
            "threshold": 0.9
        },
        "signature_type": "Line",
        "source": "https://github.com/facebook/folly/commit/8e927ee48b114c8a2f90d0cbd5ac753795a6761f",
        "signature_version": "v1"
    },
    {
        "id": "CVE-2018-6337-9642f365",
        "target": {
            "file": "hphp/runtime/version.h"
        },
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "32876589609925362676926719200585395072",
                "109574309600017076406065776388583700439",
                "281574740350394436842520560909858709910",
                "140335216194151808759673220052749435881"
            ],
            "threshold": 0.9
        },
        "signature_type": "Line",
        "source": "https://github.com/facebook/hhvm/commit/cea63133cb066ebff74f9fc42789fa2017beab55",
        "signature_version": "v1"
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-6337.json"