CVE-2018-6335
HIGH
7.5
CVSS Score
Published: December 31, 2018 at 08:00 PM UTC
Updated: June 17, 2026 at 02:01 AM UTC
1 product affected across 1 vendorHHVM
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Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
No known exploit
Description
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.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (2)
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/facebook/hhvm/commit/4cb57dd753a339654ca464c139db9871fe961d56x_refsource_MISCVendor Advisory
Source: [email protected]
https://hhvm.com/blog/2018/05/04/hhvm-3.25.3.htmlSSVC — Action Prioritization
SSVCNo known exploitAutomatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
7.5HIGHCISA-ADP
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-400CWE-20
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