Vulnerability Name:

CVE-2020-1892 (CCN-177154)

Assigned:2019-12-02
Published:2020-02-20
Updated:2020-03-05
Summary: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.
CVSS v3 Severity:8.1 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H)
7.1 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): High
6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:6.4 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): Partial
6.4 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-125
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2020-1892

Source: XF
Type: UNKNOWN
hhvm-cve20201892-info-disc(177154)

Source: CONFIRM
Type: Patch
https://github.com/facebook/hhvm/commit/dabd48caf74995e605f1700344f1ff4a5d83441d

Source: CCN
Type: HHVM Blog, February 20, 2020
Security Update

Source: CONFIRM
Type: Vendor Advisory
https://hhvm.com/blog/2020/02/20/security-update.html

Vulnerable Configuration:Configuration 1:
  • cpe:/a:facebook:hhvm:*:*:*:*:*:*:*:* (Version < 4.8.7)
  • OR cpe:/a:facebook:hhvm:*:*:*:*:*:*:*:* (Version >= 4.9.0 and <= 4.32.0)
  • OR cpe:/a:facebook:hhvm:*:*:*:*:*:*:*:* (Version >= 4.33.0 and <= 4.38.0)
  • OR cpe:/a:facebook:hhvm:4.39.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.40.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.41.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.42.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.43.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.44.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.45.0:*:*:*:*:*:*:*

  • Configuration CCN 1:
  • cpe:/a:facebook:hhvm:4.9.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.39.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.40.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.41.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.42.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.43.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.44.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.45.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.33.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.34.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.35.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.36.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.38.0:*:*:*:*:*:*:*
  • OR cpe:/a:facebook:hhvm:4.32.0:*:*:*:*:*:*:*

  • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.bionic:def:202018920000000
    V
    CVE-2020-1892 on Ubuntu 18.04 LTS (bionic) - medium.
    2020-03-03
    oval:com.ubuntu.xenial:def:202018920000000
    V
    CVE-2020-1892 on Ubuntu 16.04 LTS (xenial) - medium.
    2020-03-03
    BACK
    facebook hhvm *
    facebook hhvm *
    facebook hhvm *
    facebook hhvm 4.39.0
    facebook hhvm 4.40.0
    facebook hhvm 4.41.0
    facebook hhvm 4.42.0
    facebook hhvm 4.43.0
    facebook hhvm 4.44.0
    facebook hhvm 4.45.0
    facebook hhvm 4.9.0
    facebook hhvm 4.39.0
    facebook hhvm 4.40.0
    facebook hhvm 4.41.0
    facebook hhvm 4.42.0
    facebook hhvm 4.43.0
    facebook hhvm 4.44.0
    facebook hhvm 4.45.0
    facebook hhvm 4.33.0
    facebook hhvm 4.34.0
    facebook hhvm 4.35.0
    facebook hhvm 4.36.0
    facebook hhvm 4.38.0
    facebook hhvm 4.32.0