Описание
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 8dc37cb, when h2o receives a ClientHello message over TLS or QUIC and it contains a zero-length SNI extension, the h2o server runs over the zero-length hostname while trying to copy the hostname, assuming that it is NULL-terminated. This is a potential denial-of-service attack vector in sense that it might trigger segmentation violation. This issue has been fixed by commit 8dc37cb.
| Релиз | Статус | Примечание |
|---|---|---|
| devel | not-affected | no longer depends on h2o |
| esm-apps-legacy/xenial | not-affected | dns over https not implemented |
| esm-apps/bionic | not-affected | dns over https not implemented |
| esm-apps/focal | not-affected | uses system h2o |
| esm-apps/jammy | not-affected | uses system h2o |
| esm-apps/noble | needs-triage | |
| esm-apps/resolute | not-affected | no longer depends on h2o |
| jammy | not-affected | uses system h2o |
| noble | needs-triage | |
| resolute | not-affected | no longer depends on h2o |
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| Релиз | Статус | Примечание |
|---|---|---|
| devel | DNE | |
| esm-apps/bionic | needs-triage | |
| esm-apps/focal | needs-triage | |
| esm-apps/jammy | needs-triage | |
| esm-apps/noble | needs-triage | |
| jammy | needs-triage | |
| noble | needs-triage | |
| resolute | DNE | |
| upstream | needs-triage |
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EPSS
5.9 Medium
CVSS3
Связанные уязвимости
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 8dc37cb, when h2o receives a ClientHello message over TLS or QUIC and it contains a zero-length SNI extension, the h2o server runs over the zero-length hostname while trying to copy the hostname, assuming that it is NULL-terminated. This is a potential denial-of-service attack vector in sense that it might trigger segmentation violation. This issue has been fixed by commit 8dc37cb.
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Pr ...
EPSS
5.9 Medium
CVSS3