Information Leakage and DoS Vulnerability in HHVM by Facebook
CVE-2020-1892

8.1HIGH

Key Information:

Vendor

Facebook

Status
Hhvm
Vendor
CVE Published:
3 March 2020

What is CVE-2020-1892?

The vulnerability in HHVM arises from insufficient boundary checks during the decoding of JSON in the JSON_parser. This flaw allows unauthorized read access to out-of-bounds memory, potentially resulting in information leakage and enabling denial-of-service attacks. The impact is significant, affecting multiple versions of HHVM, as detailed above. Users are encouraged to review the provided references and update to secure their systems.

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Affected Version(s)

HHVM 4.45.1

HHVM 4.45.0

HHVM 4.44.1

References

https://hhvm.com/blog/2020/02/20/security-update.html
x_refsource_CONFIRM
https://github.com/facebook/hhvm/commit/dabd48caf74995e60...
x_refsource_CONFIRM

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
.