Upstream information
Description
H2O version 2.2.3 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/2 header.SUSE information
Overall state of this security issue: Does not affect SUSE products
This issue is currently rated as having important severity.
| CVSS detail | National Vulnerability Database | 
|---|---|
| Base Score | 5 | 
| Vector | AV:N/AC:L/Au:N/C:N/I:N/A:P | 
| Access Vector | Network | 
| Access Complexity | Low | 
| Authentication | None | 
| Confidentiality Impact | None | 
| Integrity Impact | None | 
| Availability Impact | Partial | 
| CVSS detail | National Vulnerability Database | 
|---|---|
| Base Score | 7.5 | 
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | 
| Attack Vector | Network | 
| Attack Complexity | Low | 
| Privileges Required | None | 
| User Interaction | None | 
| Scope | Unchanged | 
| Confidentiality Impact | None | 
| Integrity Impact | None | 
| Availability Impact | High | 
| CVSSv3 Version | 3 | 
SUSE Timeline for this CVE
CVE page created: Thu Dec 21 21:43:14 2017CVE page last modified: Mon Oct 6 19:02:16 2025