HOMEVULNERABILITIESCVE-2018-6337
HIGH

CVE-2018-6337

CWE-212Published: December 31, 2018· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2018-6337 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

facebook2 product(s)
follyhhvm
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/facebook/folly/commit/8e927ee48b114c8a2f90d0cbd5ac753795a6761f
PATCHhttps://github.com/facebook/hhvm/commit/e2d10a1e32d01f71aaadd81169bcb9ae86c5d6b8
PATCHhttps://github.com/facebook/folly/commit/8e927ee48b114c8a2f90d0cbd5ac753795a6761f
PATCHhttps://github.com/facebook/hhvm/commit/e2d10a1e32d01f71aaadd81169bcb9ae86c5d6b8
ADVISORYhttps://hhvm.com/blog/2018/05/24/hhvm-3.26.3.html
ADVISORYhttps://hhvm.com/blog/2018/05/24/hhvm-3.26.3.html

All References (6)

→
https://github.com/facebook/folly/commit/8e927ee48b114c8a2f90d0cbd5ac753795a6761fPatch · Third Party Advisory
→
https://github.com/facebook/hhvm/commit/e2d10a1e32d01f71aaadd81169bcb9ae86c5d6b8Patch · Third Party Advisory
→
https://hhvm.com/blog/2018/05/24/hhvm-3.26.3.htmlRelease Notes · Vendor Advisory
→
https://github.com/facebook/folly/commit/8e927ee48b114c8a2f90d0cbd5ac753795a6761fPatch · Third Party Advisory
→
https://github.com/facebook/hhvm/commit/e2d10a1e32d01f71aaadd81169bcb9ae86c5d6b8Patch · Third Party Advisory
→
https://hhvm.com/blog/2018/05/24/hhvm-3.26.3.htmlRelease Notes · Vendor Advisory

Quick Facts

CVE IDCVE-2018-6337
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-212
CISA KEVNo
Affected1 vendor(s)
PublishedDec 31, 2018

Related CVEs (CWE-212)

CVE-2022-1650
9.3
CVE-2020-11684
9.1
CVE-2022-2818
8.8
CVE-2019-13402
8.8
CVE-2020-15094
8.8
CVE-2026-39937
8.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-6337 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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