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. 
Published 2023-09-13 17:15:10
Updated 2023-09-19 16:02:53
Source Google Inc.
View at NVD,   CVE.org
Vulnerability category: Denial of service

Exploit prediction scoring system (EPSS) score for CVE-2023-4785

0.06%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 21 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2023-4785

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.5
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.9
3.6
Google Inc.
7.5
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.9
3.6
NIST

CWE ids for CVE-2023-4785

  • An exception is thrown from a function, but it is not caught.
    Assigned by: cve-coordination@google.com (Secondary)

References for CVE-2023-4785

  • https://github.com/grpc/grpc/pull/33667
    [backport][iomgr][EventEngine] Improve server handling of file descriptor exhaustion by drfloob · Pull Request #33667 · grpc/grpc · GitHub
    Issue Tracking
  • https://github.com/grpc/grpc/pull/33669
    [backport][iomgr][EventEngine] Improve server handling of file descriptor exhaustion by drfloob · Pull Request #33669 · grpc/grpc · GitHub
    Issue Tracking
  • https://github.com/grpc/grpc/pull/33670
    [backport][iomgr][EventEngine] Improve server handling of file descriptor exhaustion by drfloob · Pull Request #33670 · grpc/grpc · GitHub
    Issue Tracking
  • https://github.com/grpc/grpc/pull/33672
    [backport][iomgr][EventEngine] Improve server handling of file descriptor exhaustion by drfloob · Pull Request #33672 · grpc/grpc · GitHub
    Issue Tracking
  • https://github.com/grpc/grpc/pull/33656
    [iomgr][EventEngine] Improve server handling of file descriptor exhaustion by drfloob · Pull Request #33656 · grpc/grpc · GitHub
    Issue Tracking;Patch

Products affected by CVE-2023-4785

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