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CVE-2016-1000005

CRITICAL
9.8
CVSS Score
Published: February 19, 2020 at 12:38 PM UTC
Updated: June 17, 2026 at 12:38 AM UTC
1 product affected across 1 vendorHHVM

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Severity
CRITICAL9.8
Exploit prediction
EPSS 1%

Description

mcrypt_get_block_size did not enforce that the provided "module" parameter was a string, leading to type confusion if other types of data were passed in. This issue affects HHVM versions prior to 3.9.5, all versions between 3.10.0 and 3.12.3 (inclusive), and all versions between 3.13.0 and 3.14.1 (inclusive).

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

HHVM· Facebook
95%
v < 3.9.53.10.0 ≤ v ≤ 3.12.33.13.0 ≤ v ≤ 3.14.1
Affected range stops below 3.9.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_CONFIRMPatchThird Party Advisory
Source: [email protected]
https://github.com/facebook/hhvm/commit/39e7e177473350b3a5c34e8824af3b98e25efa89
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://www.facebook.com/security/advisories/cve-2016-1000005

CVSS

9.8CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-843

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