HOME VULNERABILITIESCVE-2020-1892

HIGH

CVE-2020-1892

CWE-125Published: March 3, 2020· Updated: Jun 17, 2026

8.1

CVSS v3.1

Official Description

Insufficient boundary checks when decoding JSON in JSON_parser allows read access to out of bounds memory, potentially leading to information leak and DOS. This issue affects HHVM 4.45.0, 4.44.0, 4.43.0, 4.42.0, 4.41.0, 4.40.0, 4.39.0, versions between 4.33.0 and 4.38.0 (inclusive), versions between 4.9.0 and 4.32.0 (inclusive), and versions prior to 4.8.7.

Technical Analysis

CVE-2020-1892 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), availability disruption (denial of service), with a CVSS base score of 8.1.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Affected Vendors & Products

facebook1 product(s)

hhvm

Source: NVD CPE · 8 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

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/hhvm/commit/dabd48caf74995e605f1700344f1ff4a5d83441d

PATCHhttps://github.com/facebook/hhvm/commit/dabd48caf74995e605f1700344f1ff4a5d83441d

ADVISORYhttps://hhvm.com/blog/2020/02/20/security-update.html

ADVISORYhttps://hhvm.com/blog/2020/02/20/security-update.html

All References (4)

→

https://github.com/facebook/hhvm/commit/dabd48caf74995e605f1700344f1ff4a5d83441dPatch

→

https://hhvm.com/blog/2020/02/20/security-update.htmlVendor Advisory

→

https://github.com/facebook/hhvm/commit/dabd48caf74995e605f1700344f1ff4a5d83441dPatch

→

https://hhvm.com/blog/2020/02/20/security-update.htmlVendor Advisory

Quick Facts

CVE IDCVE-2020-1892

CVSS Score8.1 / 10

SeverityHIGH

WeaknessCWE-125

CISA KEVNo

Affected1 vendor(s)

PublishedMar 3, 2020

Related CVEs (CWE-125)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2020-1892 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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