CVE-2018-6337

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 v3.0 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3.0 : HIGH

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

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:P/A:N

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://hhvm.com/blog/2018/05/24/hhvm-3.26.3.html	Release Notes Vendor Advisory
https://github.com/facebook/hhvm/commit/e2d10a1e32d01f71aaadd81169bcb9ae86c5d6b8	Patch Third Party Advisory
https://github.com/facebook/folly/commit/8e927ee48b114c8a2f90d0cbd5ac753795a6761f	Patch Third Party Advisory

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:facebook:folly::::::::
	cpe:2.3:a:facebook:hhvm::::::::

Information

Published : 2018-12-31 14:29

Updated : 2019-10-09 16:41

NVD link : CVE-2018-6337

Mitre link : CVE-2018-6337

JSON object : View

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

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Products Affected

facebook

hhvm
folly

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