01 Record

CVE-2020-1892

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,

UnratedPUBLISHEDCNA: facebook

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 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,

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 1.09% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 65.3% of scored records. A rank, not a probability.
NVD base score: 8.1 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2020-03-03 15:00Z6 YR AGO

Last updated

2024-08-04 06:53Z2 YR AGO

Reserved

2019-12-02

Assigning CNA

facebook

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-125Out-of-bounds ReadBase

Data version

5.1

Document digest

c639b12d29a80ba8284bb91d783b5233e6dfde41e808e1f704c9c17696c48f19

05 Affected products

VendorProductVersionsPlatforms

FacebookHHVM4.45.1, 4.45.0, 4.44.1, 4.44.0, 4.43.1, 4.43.0, 4.42.1, 4.42.0, 4.41.1, 4.41.0, 4.40.1, 4.40.0, 4.39.1, 4.39.0, 4.38.1, 4.33.0 to < unspecified, 4.32.1, 4.9.0 to < unspecified, 4.8.7, <= 4.8.6—

06 References

hhvm.comhttps://hhvm.com/blog/2020/02/20/security-update.htmlx_refsource_CONFIRM
github.comhttps://github.com/facebook/hhvm/commit/dabd48caf74995e605f1700344f1ff4a5d83441dx_refsource_CONFIRM

07 Fixed in

Ubuntu 16.04 LTS

hhvm
No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

hhvm
No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.