Out-of-Bounds Read in HHVM from Facebook
CVE-2020-1919

7.5HIGH

Key Information:

Vendor

Facebook

Status
Hhvm
Vendor
CVE Published:
10 March 2021

What is CVE-2020-1919?

An issue exists in the substr_compare function of HHVM, leading to incorrect bounds calculations. This flaw could trigger an out-of-bounds read when the second string argument exceeds the length of the first string, potentially compromising system integrity. The vulnerability affects multiple versions of HHVM, necessitating careful monitoring and updates to ensure security.

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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:
High
Integrity:
None
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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