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CVE-2023-4785

Denial of Service in gRPC Core

Published: Sep 13, 2023Updated: Jan 12, 2026 Sources: CVE List NVD GHSACWE-248
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.7%
Top 53.1%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-248NVD-CWE-noinfo

Affected Products

grpcgrpc
Library
OSS Libraries / generic-library
gRPCGoogle
On-prem
Mobile Apps / android-app
grpcRubyGemsOSS Libraries
grpcioPyPIOSS Libraries
grpcoss-projectOSS Libraries
googlecommercialUSMobile Appsaka google inc, google llc
rubygemspackage-ecosystemOSS Libraries
pypipackage-ecosystemOSS Libraries

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

References

https://github.com/grpc/grpc/pull/33656
github.com
https://github.com/grpc/grpc/pull/33667
github.com
https://github.com/grpc/grpc/pull/33669
github.com
and 9 more references View all →

Timeline

Published
Sep 13, 2023
Last Updated
Jan 12, 2026

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