| CVE-2023-30847 | Date: (C)2023-04-28 (M)2023-11-10 |
H2O is an HTTP server. In versions 2.3.0-beta2 and prior, when the reverse proxy handler tries to processes a certain type of invalid HTTP request, it tries to build an upstream URL by reading from uninitialized pointer. This behavior can lead to crashes or leak of information to back end HTTP servers. Pull request number 3229 fixes the issue. The pull request has been merged to the `master` branch in commit f010336. Users should upgrade to commit f010336 or later.
CVSS Score and Metrics +CVSS Score and Metrics -| CVSS V3 Severity: | CVSS V2 Severity: |
| CVSS Score : 8.2 | CVSS Score : |
| Exploit Score: 3.9 | Exploit Score: |
| Impact Score: 4.2 | Impact Score: |
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| CVSS V3 Metrics: | CVSS V2 Metrics: |
| Attack Vector: NETWORK | Access Vector: |
| Attack Complexity: LOW | Access Complexity: |
| Privileges Required: NONE | Authentication: |
| User Interaction: NONE | Confidentiality: |
| Scope: UNCHANGED | Integrity: |
| Confidentiality: LOW | Availability: |
| Integrity: NONE | |
| Availability: HIGH | |
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