ubuntu-cve-2023-30847
Vulnerability from osv_ubuntu
Published
2023-04-27 15:15
Modified
2026-04-22 07:45
Summary
Details
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.
Severity
8.2 (High)
8.2 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "h2o",
"binary_version": "2.2.4+dfsg-1ubuntu0.1~esm2"
},
{
"binary_name": "libh2o-dev-common",
"binary_version": "2.2.4+dfsg-1ubuntu0.1~esm2"
},
{
"binary_name": "libh2o-evloop0.13",
"binary_version": "2.2.4+dfsg-1ubuntu0.1~esm2"
},
{
"binary_name": "libh2o0.13",
"binary_version": "2.2.4+dfsg-1ubuntu0.1~esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "h2o",
"purl": "pkg:deb/ubuntu/h2o@2.2.4+dfsg-1ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.2.3+dfsg-2",
"2.2.4+dfsg-1",
"2.2.4+dfsg-1build1",
"2.2.4+dfsg-1ubuntu0.1~esm2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "h2o",
"binary_version": "2.2.5+dfsg2-3ubuntu0.1~esm1"
},
{
"binary_name": "libh2o-dev-common",
"binary_version": "2.2.5+dfsg2-3ubuntu0.1~esm1"
},
{
"binary_name": "libh2o-evloop0.13",
"binary_version": "2.2.5+dfsg2-3ubuntu0.1~esm1"
},
{
"binary_name": "libh2o0.13",
"binary_version": "2.2.5+dfsg2-3ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "h2o",
"purl": "pkg:deb/ubuntu/h2o@2.2.5+dfsg2-3ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.2.5+dfsg2-3",
"2.2.5+dfsg2-3build1",
"2.2.5+dfsg2-3ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "h2o",
"binary_version": "2.2.5+dfsg2-6.1ubuntu2+esm1"
},
{
"binary_name": "libh2o-dev-common",
"binary_version": "2.2.5+dfsg2-6.1ubuntu2+esm1"
},
{
"binary_name": "libh2o-evloop0.13",
"binary_version": "2.2.5+dfsg2-6.1ubuntu2+esm1"
},
{
"binary_name": "libh2o0.13",
"binary_version": "2.2.5+dfsg2-6.1ubuntu2+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "h2o",
"purl": "pkg:deb/ubuntu/h2o@2.2.5+dfsg2-6.1ubuntu2+esm1?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.2.5+dfsg2-6",
"2.2.5+dfsg2-6.1",
"2.2.5+dfsg2-6.1ubuntu1",
"2.2.5+dfsg2-6.1ubuntu2",
"2.2.5+dfsg2-6.1ubuntu2+esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "h2o",
"binary_version": "2.2.5+dfsg2-8.1ubuntu3"
},
{
"binary_name": "libh2o-dev-common",
"binary_version": "2.2.5+dfsg2-8.1ubuntu3"
},
{
"binary_name": "libh2o-evloop0.13t64",
"binary_version": "2.2.5+dfsg2-8.1ubuntu3"
},
{
"binary_name": "libh2o0.13t64",
"binary_version": "2.2.5+dfsg2-8.1ubuntu3"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "h2o",
"purl": "pkg:deb/ubuntu/h2o@2.2.5+dfsg2-8.1ubuntu3?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.2.5+dfsg2-7",
"2.2.5+dfsg2-8",
"2.2.5+dfsg2-8.1ubuntu1",
"2.2.5+dfsg2-8.1ubuntu2",
"2.2.5+dfsg2-8.1ubuntu3"
]
}
],
"aliases": [],
"details": "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.",
"id": "UBUNTU-CVE-2023-30847",
"modified": "2026-04-22T07:45:18Z",
"published": "2023-04-27T15:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2023-30847"
},
{
"type": "REPORT",
"url": "https://github.com/h2o/h2o/security/advisories/GHSA-p5hj-phwj-hrvx"
},
{
"type": "REPORT",
"url": "https://github.com/h2o/h2o/commit/f010336bab162839df43d9e87570897466c97e33"
},
{
"type": "REPORT",
"url": "https://github.com/h2o/h2o/pull/3229"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-30847"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2023-30847"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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