Vulnerability Database

314,433

Total vulnerabilities in the database

CVE-2020-1921

In the crypt function, we attempt to null terminate a buffer using the size of the input salt without validating that the offset is within the buffer. This issue affects HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, and versions 4.94.0, 4.95.0, 4.96.0, 4.97.0, 4.98.0.

  • Published: Mar 10, 2021
  • Updated: Nov 16, 2025
  • CVE: CVE-2020-1921
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2:

  • Severity: Medium
  • Score: 5
  • AV:N/AC:L/Au:N/C:N/I:N/A:P

CWEs:

Software From Fixed in
facebook / hhvm 4.95.0 4.95.0.x
facebook / hhvm 4.96.0 4.96.0.x
facebook / hhvm 4.97.0 4.97.0.x
facebook / hhvm 4.98.0 4.98.0.x
facebook / hhvm 4.94.0 4.94.0.x
facebook / hhvm 4.81.0 4.93.2
facebook / hhvm 4.57.0 4.80.2
facebook / hhvm - 4.56.3