ubuntu-cve-2023-32731
Vulnerability from osv_ubuntu
Published
2023-06-09 11:15
Modified
2026-05-20 15:02
Summary
Details
When gRPC HTTP2 stack raised a header size exceeded error, it skipped parsing the rest of the HPACK frame. This caused any HPACK table mutations to also be skipped, resulting in a desynchronization of HPACK tables between sender and receiver. If leveraged, say, between a proxy and a backend, this could lead to requests from the proxy being interpreted as containing headers from different proxy clients - leading to an information leak that can be used for privilege escalation or data exfiltration. We recommend upgrading beyond the commit contained in https://github.com/grpc/grpc/pull/33005 https://github.com/grpc/grpc/pull/33005
Severity
7.4 (High)
7.5 (High)
N/A (UNKNOWN)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libgrpc0",
"binary_version": "0.11.1-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "grpc",
"purl": "pkg:deb/ubuntu/grpc@0.11.1-1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.10.2-1",
"0.11.1-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libgrpc++1",
"binary_version": "1.3.2-1.1~build1"
},
{
"binary_name": "libgrpc3",
"binary_version": "1.3.2-1.1~build1"
},
{
"binary_name": "protobuf-compiler-grpc",
"binary_version": "1.3.2-1.1~build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "grpc",
"purl": "pkg:deb/ubuntu/grpc@1.3.2-1.1~build1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.3.2-1",
"1.3.2-1ubuntu1",
"1.3.2-1.1~build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libgrpc++1",
"binary_version": "1.16.1-1ubuntu5"
},
{
"binary_name": "libgrpc6",
"binary_version": "1.16.1-1ubuntu5"
},
{
"binary_name": "protobuf-compiler-grpc",
"binary_version": "1.16.1-1ubuntu5"
},
{
"binary_name": "python3-grpcio",
"binary_version": "1.16.1-1ubuntu5"
},
{
"binary_name": "ruby-grpc",
"binary_version": "1.16.1-1ubuntu5"
},
{
"binary_name": "ruby-grpc-tools",
"binary_version": "1.16.1-1ubuntu5"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "grpc",
"purl": "pkg:deb/ubuntu/grpc@1.16.1-1ubuntu5?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.16.1-1",
"1.16.1-1ubuntu1",
"1.16.1-1ubuntu3",
"1.16.1-1ubuntu4",
"1.16.1-1ubuntu5"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libgrpc++1",
"binary_version": "1.30.2-3build6"
},
{
"binary_name": "libgrpc10",
"binary_version": "1.30.2-3build6"
},
{
"binary_name": "protobuf-compiler-grpc",
"binary_version": "1.30.2-3build6"
},
{
"binary_name": "python3-grpcio",
"binary_version": "1.30.2-3build6"
},
{
"binary_name": "ruby-grpc",
"binary_version": "1.30.2-3build6"
},
{
"binary_name": "ruby-grpc-tools",
"binary_version": "1.30.2-3build6"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "grpc",
"purl": "pkg:deb/ubuntu/grpc@1.30.2-3build6?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.30.2-3",
"1.30.2-3build1",
"1.30.2-3build3",
"1.30.2-3build5",
"1.30.2-3build6"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libgrpc++1.51t64",
"binary_version": "1.51.1-4.1build5"
},
{
"binary_name": "libgrpc29t64",
"binary_version": "1.51.1-4.1build5"
},
{
"binary_name": "protobuf-compiler-grpc",
"binary_version": "1.51.1-4.1build5"
},
{
"binary_name": "python3-grpcio",
"binary_version": "1.51.1-4.1build5"
},
{
"binary_name": "ruby-grpc",
"binary_version": "1.51.1-4.1build5"
},
{
"binary_name": "ruby-grpc-tools",
"binary_version": "1.51.1-4.1build5"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "grpc",
"purl": "pkg:deb/ubuntu/grpc@1.51.1-4.1build5?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.51.1-3build3",
"1.51.1-3build4",
"1.51.1-4",
"1.51.1-4build1",
"1.51.1-4build2",
"1.51.1-4.1build3",
"1.51.1-4.1build4",
"1.51.1-4.1build5"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libgrpc++1.51t64",
"binary_version": "1.51.1-6build1"
},
{
"binary_name": "libgrpc29t64",
"binary_version": "1.51.1-6build1"
},
{
"binary_name": "protobuf-compiler-grpc",
"binary_version": "1.51.1-6build1"
},
{
"binary_name": "python3-grpcio",
"binary_version": "1.51.1-6build1"
},
{
"binary_name": "ruby-grpc",
"binary_version": "1.51.1-6build1"
},
{
"binary_name": "ruby-grpc-tools",
"binary_version": "1.51.1-6build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "grpc",
"purl": "pkg:deb/ubuntu/grpc@1.51.1-6build1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.51.1-6",
"1.51.1-6build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libgrpc++1.51t64",
"binary_version": "1.51.1-8ubuntu1"
},
{
"binary_name": "libgrpc29t64",
"binary_version": "1.51.1-8ubuntu1"
},
{
"binary_name": "protobuf-compiler-grpc",
"binary_version": "1.51.1-8ubuntu1"
},
{
"binary_name": "python3-grpcio",
"binary_version": "1.51.1-8ubuntu1"
},
{
"binary_name": "ruby-grpc",
"binary_version": "1.51.1-8ubuntu1"
},
{
"binary_name": "ruby-grpc-tools",
"binary_version": "1.51.1-8ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "grpc",
"purl": "pkg:deb/ubuntu/grpc@1.51.1-8ubuntu1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.51.1-6build1",
"1.51.1-7",
"1.51.1-7ubuntu2",
"1.51.1-7ubuntu3",
"1.51.1-8ubuntu1"
]
}
],
"aliases": [],
"details": "When gRPC HTTP2 stack raised a header size exceeded error, it skipped parsing the rest of the HPACK frame. This caused any HPACK table mutations to also be skipped, resulting in a desynchronization of HPACK tables between sender and receiver. If leveraged, say, between a proxy and a backend, this could lead to requests from the proxy being interpreted as containing headers from different proxy clients - leading to an information leak that can be used for privilege escalation or data exfiltration. We recommend upgrading beyond the commit contained in https://github.com/grpc/grpc/pull/33005 https://github.com/grpc/grpc/pull/33005",
"id": "UBUNTU-CVE-2023-32731",
"modified": "2026-05-20T15:02:41Z",
"published": "2023-06-09T11:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2023-32731"
},
{
"type": "REPORT",
"url": "https://github.com/grpc/grpc/pull/32309"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-32731"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2023-32731"
]
}
Loading…
Loading…
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
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
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.
Loading…
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.
Loading…