CVE-2020-1914

CVSS V2 High 7.5 CVSS V3 Critical 9.8
Description
A logic vulnerability when handling the SaveGeneratorLong instruction in Facebook Hermes prior to commit b2021df620824627f5a8c96615edbd1eb7fdddfc allows attackers to potentially read out of bounds or theoretically execute arbitrary code via crafted JavaScript. Note that this is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. Hence, most React Native applications are not affected.
Overview
  • CVE ID
  • CVE-2020-1914
  • Assigner
  • cve-assign@fb.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2020-10-08T19:15:12
  • Last Modified Date
  • 2020-10-20T18:28:34
Weakness Enumerations
CWE URL
CWE-670 http://cwe.mitre.org/data/definitions/670.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:facebook:hermes:*:*:*:*:*:*:*:* 1 OR 2020-10-01
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:P/I:P/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • PARTIAL
  • Base Score
  • 7.5
  • Severity
  • HIGH
  • Exploitability Score
  • 10
  • Impact Score
  • 6.4
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 9.8
  • Base Severity
  • CRITICAL
  • Exploitability Score
  • 3.9
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://www.facebook.com/security/advisories/cve-2020-1914 Vendor Advisory
https://github.com/facebook/hermes/commit/b2021df620824627f5a8c96615edbd1eb7fdddfc Patch Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2020-1914
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-1914
History
Created Old Value New Value Data Type Notes
2022-05-10 16:23:01 Added to TrackCVE
2022-12-04 23:54:09 2020-10-08T19:15Z 2020-10-08T19:15:12 CVE Published Date updated
2022-12-04 23:54:09 2020-10-20T18:28:34 CVE Modified Date updated
2022-12-04 23:54:09 Analyzed Vulnerability Status updated