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CVE-2018-6337

UNKNOWN
Published 2018-12-31T22:00:00.000Z
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Expert Analysis

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CVSS Score

V3.1
7.5
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.003
probability
of exploitation in the wild

There is a 0.3% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.519
Higher than 51.9% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
NONE
Integrity
HIGH
Availability
NONE

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Facebook

HHVM

Affected Versions:

3.26.3 3.26.0 unspecified
Facebook

folly

Affected Versions:

v2018.08.09.00 v2017.12.11.00 unspecified

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed HIGH

GHSA-46jm-3g2r-j53x

Advisory 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.

CVSS Scoring

CVSS Score

7.5

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2018-6337
WEB https://github.com/facebook/folly/commit/8e927ee48b114c8a2f90d0cbd5ac753795a6761f
WEB https://github.com/facebook/hhvm/commit/e2d10a1e32d01f71aaadd81169bcb9ae86c5d6b8
WEB https://hhvm.com/blog/2018/05/24/hhvm-3.26.3.html

Advisory provided by GitHub Security Advisory Database. Published: May 13, 2022, Modified: May 13, 2022

References

https://hhvm.com/blog/2018/05/24/hhvm-3.26.3.html
https://github.com/facebook/folly/commit/8e927ee48b114c8a2f90d0cbd5ac753795a6761f
https://github.com/facebook/hhvm/commit/e2d10a1e32d01f71aaadd81169bcb9ae86c5d6b8
Published: 2018-12-31T22:00:00.000Z
Last Modified: 2025-05-06T16:39:21.216Z
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