Buffer Overflow Vulnerability in HHVM by Facebook
CVE-2020-1921

7.5HIGH

Key Information:

Vendor

Facebook

Status
Hhvm
Vendor
CVE Published:
10 March 2021

What is CVE-2020-1921?

A vulnerability exists in the crypt function of HHVM, where the code attempts to null terminate a buffer using the size of the input salt. This process does not adequately validate that the offset remains within the bounds of the buffer, potentially leading to a buffer overflow scenario. This flaw impacts several versions of HHVM, necessitating swift action from users to update and mitigate risk.

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Affected Version(s)

HHVM 4.98.0

HHVM 4.97.0

HHVM 4.96.0

References

https://hhvm.com/blog/2021/02/25/security-update.html
x_refsource_MISC
https://github.com/facebook/hhvm/commit/08193b7f0cd391025...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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