CVE-2023-4785

Lack of error handling in the TCP server in Google's gRPC starting version 1.23 on posix-compatible platforms (ex. Linux) allows an attacker to cause a denial of service by initiating a significant number of connections with the server. Note that gRPC C++ Python, and Ruby are affected, but gRPC Java, and Go are NOT affected.

Database specific

{
    "cna_assigner": "Google",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "1.55.0"
                },
                {
                    "last_affected": "1.55.2"
                }
            ]
        }
    ],
    "cwe_ids": [
        "CWE-248"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/4xxx/CVE-2023-4785.json"
}

References

Affected packages

Git / github.com/grpc/grpc

Affected ranges

Type

GIT

Repo

https://github.com/grpc/grpc

Events

Introduced

7c0764918b9f33cab507ff483b4be849b0203ec4

Fixed

afb307fb89ed83f358d82b5d359034a039a95e66

Introduced

6847e05dbb8088a918f06e2231a405942b5c002d

Fixed

868412b573a0663c8db41558498caf44098f4390

Introduced

0bf4a618b17a3f0ed61c22364913c7f66fc1c61a

Fixed

49dcbce9aba5f5f0959871354df90e38f0c5ed00

Introduced

6e85620c7e258df79666a4743f862f2f82701c2d

Last affected

6e85620c7e258df79666a4743f862f2f82701c2d

Database specific

{
    "cpe": [
        "cpe:2.3:a:grpc:grpc:*:*:*:*:*:-:*:*",
        "cpe:2.3:a:grpc:grpc:1.56.0:*:*:*:*:-:*:*"
    ],
    "source": [
        "CPE_RANGE",
        "CPE_STRING"
    ],
    "extracted_events": [
        {
            "introduced": "1.23.0"
        },
        {
            "fixed": "1.53.2"
        },
        {
            "introduced": "1.54.0"
        },
        {
            "fixed": "1.54.3"
        },
        {
            "introduced": "1.55.0"
        },
        {
            "fixed": "1.55.3"
        },
        {
            "introduced": "1.56.0"
        },
        {
            "last_affected": "1.56.0"
        }
    ]
}

Type

GIT

Repo

https://github.com/grpc/grpc-go

Events

Introduced

0ed709c4a71d08e5877b4bfb41c2747b0d1c3240

Last affected

0ed709c4a71d08e5877b4bfb41c2747b0d1c3240

Database specific

{
    "cpe": "cpe:2.3:a:grpc:grpc:1.56.0:*:*:*:*:-:*:*",
    "source": "CPE_STRING",
    "extracted_events": [
        {
            "introduced": "1.56.0"
        },
        {
            "last_affected": "1.56.0"
        }
    ]
}

Type

GIT

Repo

https://github.com/grpc/grpc-java

Events

Introduced

e48040541bb2b42e2465344faee241a24d747466

Fixed

958205ddb1ab7ec1f5bb92a1a812cf30fa753c36

Introduced

d25095c2a714bb9abccdb6622a13b8bc768dc18a

Last affected

d25095c2a714bb9abccdb6622a13b8bc768dc18a

Database specific

{
    "cpe": [
        "cpe:2.3:a:grpc:grpc:*:*:*:*:*:-:*:*",
        "cpe:2.3:a:grpc:grpc:1.56.0:*:*:*:*:-:*:*"
    ],
    "source": [
        "CPE_RANGE",
        "CPE_STRING"
    ],
    "extracted_events": [
        {
            "introduced": "1.55.0"
        },
        {
            "fixed": "1.55.3"
        },
        {
            "introduced": "1.56.0"
        },
        {
            "last_affected": "1.56.0"
        }
    ]
}

Affected versions

1.*

1.56.0

v1.*

v1.54.0

v1.54.1

v1.54.2

v1.55.0

v1.55.1

v1.56.0

v1.56.0-dev

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-4785.json"

vanir_signatures_modified

"2026-07-22T02:50:17Z"

vanir_signatures

[
    {
        "signature_version": "v1",
        "source": "https://github.com/grpc/grpc-java/commit/958205ddb1ab7ec1f5bb92a1a812cf30fa753c36",
        "id": "CVE-2023-4785-f337f5d8",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "148529735852666896963464408479363428299",
                "317277031500261825959216832225781396438",
                "121902372659488140859240128980598754188",
                "234477324359876819246199200915366156403"
            ]
        },
        "target": {
            "file": "core/src/main/java/io/grpc/internal/GrpcUtil.java"
        },
        "deprecated": false,
        "signature_type": "Line"
    }
]