What is the CVSS score of CVE-2023-42801?

CVE-2023-42801 has a CVSS 3.1 base score of 7.6 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H. EPSS exploitation probability: 0.8%.

Is there a public PoC exploit available for CVE-2023-42801?

Yes, a public proof-of-concept exploit is available for CVE-2023-42801. Prioritise patching immediately. EPSS: 0.8%.

Is there a patch available for CVE-2023-42801?

Yes, a patch is available for CVE-2023-42801. Update the affected software to the latest version immediately.

Moonlight Common C CVE-2023-42801

HIGH

Classic Buffer Overflow (CWE-120)

2023-12-14 security-advisories@github.com

Buffer Overflow Apple Google Moonlight Common C Moonlight Moonlight Embedded Moonlight Xbox Moonlight Tv Moonlight Switch Moonlight Vita Moonlight Qt Pc

7.6

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.6 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

High

Lifecycle Timeline

CVE Published

Dec 14, 2023 - 17:15 nvd

HIGH 7.6

DescriptionNVD

Moonlight-common-c contains the core GameStream client code shared between Moonlight clients. Moonlight-common-c is vulnerable to buffer overflow starting in commit f57bd745b4cbed577ea654fad4701bea4d38b44c. A malicious game streaming server could exploit a buffer overflow vulnerability to crash a moonlight client. Achieving RCE is possible but unlikely, due to stack canaries in use by modern compiler toolchains. The published binaries for official clients Qt, Android, iOS/tvOS, and Embedded are built with stack canaries, but some unofficial clients may not use stack canaries. This vulnerability takes place after the pairing process, so it requires the client to be tricked into pairing to a malicious host. It is not possible to perform using a man-in-the-middle due to public key pinning that takes place during the pairing process. The bug was addressed in commit b2497a3918a6d79808d9fd0c04734786e70d5954.

AnalysisAI

Moonlight-common-c contains the core GameStream client code shared between Moonlight clients. Rated high severity (CVSS 7.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. Moonlight-common-c contains the core GameStream client code shared between Moonlight clients. Moonlight-common-c is vulnerable to buffer overflow starting in commit f57bd745b4cbed577ea654fad4701bea4d38b44c. A malicious game streaming server could exploit a buffer overflow vulnerability to crash a moonlight client. Achieving RCE is possible but unlikely, due to stack canaries in use by modern compiler toolchains. The published binaries for official clients Qt, Android, iOS/tvOS, and Embedded are built with stack canaries, but some unofficial clients may not use stack canaries. This vulnerability takes place after the pairing process, so it requires the client to be tricked into pairing to a malicious host. It is not possible to perform using a man-in-the-middle due to public key pinning that takes place during the pairing process. The bug was addressed in commit b2497a3918a6d79808d9fd0c04734786e70d5954. Affected products include: Moonlight-Stream Moonlight-Common-C, Moonlight-Stream Moonlight, Moonlight-Stream Moonlight Embedded, Moonlight-Stream Moonlight Xbox, Moonlight-Stream Moonlight Tv.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Always validate buffer sizes before copy operations. Use bounded functions (strncpy, snprintf). Enable compiler protections.