CVE-2023-32731

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2023-32731
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-32731.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2023-32731
Aliases
Downstream
BELL (1)
CGA (2)
openSUSE (3)
RHSA (1)
SUSE (1)
UBUNTU (1)
Related
openSUSE (3)
SUSE (1)
Published
2023-06-09T10:54:08Z
Modified
2026-09-30T18:27:02Z
Severity
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H CVSS Calculator
Summary
Information leak in gRPC
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

Database specific 
{
    "cna_assigner":  "Google",
    "cwe_ids":  [
        "CWE-440"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/32xxx/CVE-2023-32731.json"
}
References

Affected packages

Git / github.com/grpc/grpc

Affected ranges

Type
GIT
Repo
https://github.com/grpc/grpc
Events
Introduced
358bfb581feeda5bf17dd3b96da1074d84a6ef8d
Fixed
0bf4a618b17a3f0ed61c22364913c7f66fc1c61a
Database specific
Show details 
{
    "cpe":  "cpe:2.3:a:grpc:grpc:*:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "1.53"
        },
        {
            "last_affected":  "1.54"
        },
        {
            "introduced":  "1.53.0"
        },
        {
            "fixed":  "1.55.0"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}
Type
GIT
Repo
https://github.com/grpc/grpc-go
Events
Introduced
357d7afc43fe0df74205b797525818fca8cd8f53
Fixed
a75fd73d616bea96cfa1853b5bcd0aa762be0b7b
Database specific
Show details 
{
    "cpe":  "cpe:2.3:a:grpc:grpc:*:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "1.53.0"
        },
        {
            "fixed":  "1.55.0"
        }
    ],
    "source":  "CPE_RANGE"
}
Type
GIT
Repo
https://github.com/grpc/grpc-java
Events
Introduced
4ca6de0e8e52386301890b2860fb7a9a7c2c9b7c
Fixed
e48040541bb2b42e2465344faee241a24d747466
Database specific
Show details 
{
    "cpe":  "cpe:2.3:a:grpc:grpc:*:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "1.53.0"
        },
        {
            "fixed":  "1.55.0"
        }
    ],
    "source":  "CPE_RANGE"
}

Affected versions

cmd/protoc-gen-go-grpc/v1.*
cmd/protoc-gen-go-grpc/v1.3.0
v1.*
v1.53.0-dev

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-32731.json"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "186848686847118742776406955756771337553",
                "209791465984131615507118919125284817564",
                "29686144606437801261731858559341686526",
                "148346904065048773427365455448856051875"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2023-32731-beda6ddb",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/grpc/grpc-java/commit/e48040541bb2b42e2465344faee241a24d747466",
        "target":  {
            "file":  "core/src/main/java/io/grpc/internal/GrpcUtil.java"
        }
    }
]
vanir_signatures_modified 
"2026-08-12T13:34:25Z"