CVE-2023-42800

Buffer overflow due to use of `strcpy` in `performRtspHandshake`

HIGH
8.8
CVSS Score
Published: December 14, 2023 at 04:57 PM UTC
Updated: June 17, 2026 at 06:24 AM UTC
7 products affected across 1 vendorMoonlightMoonlight EmbeddedMoonlight Tv

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Severity
HIGH8.8
Exploit prediction
EPSS 2%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

10.10 ≤ v ≤ 11.08.4.0 ≤ v ≤ 8.5.00.10.22
2022-11-04 ≤ v < 2023-10-06
Affected range stops below 2023-10-06, so it looks safe — our inference, not a vendor statement
0.13 ≤ v ≤ 0.13.3
1.5.4 ≤ v ≤ 1.5.27
0.9.2 ≤ v ≤ 0.9.3
1.12.0 ≤ v ≤ 1.14.40

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-120

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