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CVE-2018-6335

Date: December 31, 2018

A Malformed h2 frame can cause 'std::out_of_range' exception when parsing priority meta data. This behavior can lead to denial-of-service. This affects all supported versions of HHVM (3.25.2, 3.24.6, and 3.21.10 and below) when using the proxygen server to handle HTTP2 requests.

Severity Score

Related Resources (5)

https://nvd.nist.gov/vuln/detail/CVE-2018-6335
https://github.com/facebook/hhvm/commit/4cb57dd753a339654ca464c139db9871fe961d56
https://hhvm.com/blog/2018/05/04/hhvm-3.25.3.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2018-6335
https://www.mend.io/vulnerability-database/CVE-2018-6335

Severity Score

Weakness Type (CWE)

Input Validation

CWE-20

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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