Security readout for executives and security teams
CVE-2016-4817 affects the H2O web server's HTTP/2 connection handling. A remote attacker could send a crafted packet that triggers a use-after-free, causing the server application to crash, with possible arbitrary code execution noted by the CVE description. Exposure is most likely where H2O is deployed as an internet-facing web server or reverse proxy with HTTP/2 enabled and versions below the fixed release boundaries. Treat this as a high-priority legacy web infrastructure issue if H2O is present. The likely business impact is service disruption, with possible code execution noted but not fully evidenced in the provided sources. Mitigation focus: Upgrade H2O to 1.7.3, 2.0.0-beta5, or a later supported version.; Prioritize internet-facing H2O deployments that serve HTTP/2 traffic.; Review H2O project and JVN guidance before applying compensating controls..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2016-4817 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/h2o/h2o/commit/1c0808d580da09fdec5a9a74ff09e103ea058dd4CVE reference · x_refsource_CONFIRM
- https://github.com/h2o/h2o/pull/920CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.