CVE-2023-42801CWE-120

Stack buffer overflow due to `strcpy` into fixed size buffer in `extractVersionQuadFromString`

High · published December 14, 2023

CVSS v3.1
7.6
EPSS
1%
Percentile
60.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.6 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
CVSS v4.0
Not supplied
EPSS
0.00936 · 60.4th percentile
Weakness
CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Published
2023-12-14T17:02Z
EPSS history
Timeline
  • 14 DEC 17:02Z
    Stack buffer overflow due to `strcpy` into fixed size buffer in `extractVersionQuadFromString`
    cvelistv5