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CVE-2023-4785

23
FAUCET Score

CVE-2023-4785 is a denial-of-service vulnerability in Google's gRPC TCP server, affecting versions 1.23 and later on Posix-compatible platforms, including gRPC C++, Python, and Ruby implementations. With a CVSS score of 7.5 (High), this vulnerability allows an unauthenticated attacker to cause a denial of service by initiating numerous connections due to a lack of error handling. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.23.0, < 1.53.2CPE matchmatch criteria
cpe:2.3:a:grpc:grpc:*:*:*:*:*:-:*:*
>= 1.54.0, < 1.54.3CPE matchmatch criteria
cpe:2.3:a:grpc:grpc:*:*:*:*:*:-:*:*
>= 1.55.0, < 1.55.3CPE matchmatch criteria
cpe:2.3:a:grpc:grpc:*:*:*:*:*:-:*:*
1.56.0CPE matchmatch criteria
cpe:2.3:a:grpc:grpc:1.56.0:*:*:*:*:-:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.67%
Probability of exploitation in next 30 days
EPSS Percentile
48.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0067 is in the 24th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (15)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 ARMFixed in: 1.62.0-2
microsoftpatch availablevia msrc
Product: 20279-17084Fixed in: 1.62.0-2
microsoftpatch availablevia msrc
Product: 17871-17084Fixed in: 1.62.0-2
microsoftpatch availablevia msrc
Product: azl3 grpc 1.42.0-7 on Azure Linux 3.0Fixed in: 1.62.0-2
microsoftpatch availablevia msrc
Product: azl3 grpc 1.62.0-2 on Azure Linux 3.0Fixed in: 1.62.0-2
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 x64Fixed in: 1.62.0-2
pippatch availablevia ghsa
Product: grpcioFixed in: 1.53.2
pippatch availablevia ghsa
Product: grpcioFixed in: 1.55.3
pippatch availablevia ghsa
Product: grpcioFixed in: 1.54.3
redhatpatch availablevia redhat_api
Product: Red Hat Satellite 6.14 for RHEL 8Fixed in: rubygem-grpc-0:1.58.0-1.el8sat
View patch
rubygemspatch availablevia ghsa
Product: grpcFixed in: 1.55.3
rubygemspatch availablevia ghsa
Product: grpcFixed in: 1.54.3
rubygemspatch availablevia ghsa
Product: grpcFixed in: 1.53.2
rubygemspatch availablevia ghsa
Product: grpcFixed in: 1.56.2

Vendor Advisories (4)

microsoft2024-Jun/CVE-2023-4785

CVE-2023-4785

Jun 11, 2024
redhatCVE-2023-4785Moderate

gRPC: file descriptor exhaustion leads to denial of service

Sep 14, 2023
rubygemsGHSA-p25m-jpj4-qcrrhigh

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

Sep 13, 2023
microsoft2023-Sep/CVE-2023-4785Important

Denial of Service in gRPC Core

Sep 12, 2023

References

github.com / grpc/grpc/pull/33656
Issue TrackingPatch
github.com / grpc/grpc/pull/33667
Issue Tracking
github.com / grpc/grpc/pull/33669
Issue Tracking
github.com / grpc/grpc/pull/33670
Issue Tracking
github.com / grpc/grpc/pull/33672
Issue Tracking