CVE-2023-42801: Stack buffer overflow due to `strcpy` into fixed size buffer in `extractVersionQuadFromString`
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 Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2023-42801?
CVE-2023-42801 has been rated as a high severity vulnerability due to its potential to allow remote code execution via a buffer overflow.
How do I fix CVE-2023-42801?
To address CVE-2023-42801, users should upgrade to the latest version of Moonlight-common-c where the vulnerability has been patched.
What does CVE-2023-42801 affect?
CVE-2023-42801 affects various versions of Moonlight Stream clients using the Moonlight-common-c package, particularly prior to specific patch releases.
Can CVE-2023-42801 be exploited remotely?
Yes, CVE-2023-42801 can be exploited by a malicious game streaming server, allowing for remote code execution.
When was CVE-2023-42801 introduced?
CVE-2023-42801 was introduced starting from commit f57bd745b4cbed577ea654fad4701bea4d38b44c.