CVE-2018-6335 is a vulnerability in Facebook Hhvm
Published on 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.
Vulnerability Analysis
CVE-2018-6335 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Resource Exhaustion Vulnerability?
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
CVE-2018-6335 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2018-6335
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Affected Versions
Facebook HHVM:- Version 3.25.3 is affected.
- Version 3.25.0 is affected.
- Version 3.24.7 is affected.
- Version 3.22.0 is affected.
- Version 3.21.11 is affected.
- Version unspecified and below 3.21.11 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.