Heap Overflow Vulnerability in HHVM from Incorrect String Size Calculations
CVE-2021-24025

9.8CRITICAL

Key Information:

Vendor

Facebook

Status
Hhvm
Vendor
CVE Published:
10 March 2021

What is CVE-2021-24025?

A vulnerability exists in HHVM caused by incorrect string size calculations within the preg_quote function. This flaw allows a large input string to trigger an integer overflow, potentially resulting in a heap overflow. This could lead to unintended behavior or exploitation in affected versions of the HHVM engine, posing security risks for applications relying on this technology.

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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:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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