CVE-2018-6335: Input Validation
A Malformed h2 frame can cause 'std::outofrange' 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.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is CVE-2018-6335?
CVE-2018-6335 is a vulnerability in Facebook HHVM where a malformed h2 frame can cause a 'std::out_of_range' exception when parsing priority metadata, leading to a denial-of-service.
How does CVE-2018-6335 affect HHVM?
CVE-2018-6335 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.
What is the severity of CVE-2018-6335?
The severity of CVE-2018-6335 is rated as high with a CVSS score of 7.5.
How can I fix CVE-2018-6335?
To fix CVE-2018-6335, it is recommended to upgrade HHVM to version 3.25.3 or later, which contains the fix for this vulnerability.
Are there any references for CVE-2018-6335?
Yes, you can find more information about CVE-2018-6335 in the following references: [GitHub commit](https://github.com/facebook/hhvm/commit/4cb57dd753a339654ca464c139db9871fe961d56) and [HHVM blog post](https://hhvm.com/blog/2018/05/04/hhvm-3.25.3.html).