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Denial of Service Vulnerability in gRPC TCP Server (Posix-compatible platforms)

High severity GitHub Reviewed Published Sep 13, 2023 to the GitHub Advisory Database • Updated Apr 22, 2024

Package

bundler grpc (RubyGems)

Affected versions

>= 1.56.0, < 1.56.2
>= 1.55.0, < 1.55.3
>= 1.54.0, < 1.54.3
>= 1.53.0, < 1.53.2

Patched versions

1.56.2
1.55.3
1.54.3
1.53.2
pip grpcio (pip)
>= 1.55.0, < 1.55.3
>= 1.54.0, < 1.54.3
>= 1.53.0, < 1.53.2
1.55.3
1.54.3
1.53.2

Description

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. 

References

Published by the National Vulnerability Database Sep 13, 2023
Published to the GitHub Advisory Database Sep 13, 2023
Reviewed Feb 2, 2024
Last updated Apr 22, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

0.095%
(41st percentile)

Weaknesses

CVE ID

CVE-2023-4785

GHSA ID

GHSA-p25m-jpj4-qcrr

Source code

No known source code

Credits

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