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cvelistGitHub_MCVELIST:CVE-2023-42801
HistoryDec 14, 2023 - 5:02 p.m.

CVE-2023-42801 Stack buffer overflow due to `strcpy` into fixed size buffer in `extractVersionQuadFromString`

2023-12-1417:02:04
CWE-120
GitHub_M
www.cve.org
buffer overflow
moonlight client
rce
vulnerability
stack canaries
pairing process
public key pinning

7.6 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

HIGH

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

8.1 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

20.3%

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.

CNA Affected

[
  {
    "vendor": "moonlight-stream",
    "product": "moonlight-common-c",
    "versions": [
      {
        "version": ">= f57bd745b4cbed577ea654fad4701bea4d38b44c, < b2497a3918a6d79808d9fd0c04734786e70d5954",
        "status": "affected"
      }
    ]
  }
]

7.6 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

HIGH

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

8.1 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

20.3%

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