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CVE-2023-42800

8.8 · HIGH

Moonlight-common-c contains the core GameStream client code shared between Moonlight clients.

Published Dec 14, 2023CWE-120EPSS 1.66%

Overview

CVE-2023-42800 is a high-severity vulnerability. It was published on December 14, 2023 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Moonlight-common-c contains the core GameStream client code shared between Moonlight clients. Moonlight-common-c is vulnerable to buffer overflow starting in commit 50c0a51b10ecc5b3415ea78c21d96d679e2288f9 due to unmitigated usage of unsafe C functions and improper bounds checking. A malicious game streaming server could exploit a buffer overflow vulnerability to crash a moonlight client, or achieve remote code execution (RCE) on the client (with insufficient exploit mitigations or if mitigations can be bypassed). The bug was addressed in commit 24750d4b748fefa03d09fcfd6d45056faca354e0.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/moonlight-stream/moonlight-common-c/blob/2bb026c763fc18807d7e4a93f918054c488f84e1/src/RtspConnection.c#L796GitHubgithub.com/moonlight-stream/moonlight-common-c/commit/24750d4b748fefa03d09fcfd6d45056faca354e0GitHubgithub.com/moonlight-stream/moonlight-common-c/commit/50c0a51b10ecc5b3415ea78c21d96d679e2288f9GitHubgithub.com/moonlight-stream/moonlight-common-c/security/advisories/GHSA-4927-23jw-rq62GitHubgithub.com/moonlight-stream/moonlight-common-c/blob/2bb026c763fc18807d7e4a93f918054c488f84e1/src/RtspConnection.c#L796GitHubgithub.com/moonlight-stream/moonlight-common-c/commit/24750d4b748fefa03d09fcfd6d45056faca354e0GitHubgithub.com/moonlight-stream/moonlight-common-c/commit/50c0a51b10ecc5b3415ea78c21d96d679e2288f9GitHubgithub.com/moonlight-stream/moonlight-common-c/security/advisories/GHSA-4927-23jw-rq62

How CyberStrike helps

Frequently asked questions

What is CVE-2023-42800?

CVE-2023-42800 is a high-severity vulnerability. It was published on December 14, 2023 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2023-42800?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-42800?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-42800?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-42800 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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