CVE-2023-42800 Buffer overflow due to use of `strcpy` in `performRtspHandshake`
A malicious game streaming server can trigger a buffer overflow in the Moonlight client library, potentially causing crashes or remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-42800?
CVE-2023-42800 is a high-severity memory corruption vulnerability in moonlight-stream moonlight-common-c, published on 14 Dec 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-120
Which versions are affected by CVE-2023-42800?
It affects 7 products.
Products include Moonlight-Stream Moonlight, Moonlight-Stream Moonlight-Common-C, Moonlight-Stream Moonlight Embedded, Moonlight-Stream Moonlight Switch, Moonlight-Stream Moonlight Tv, Moonlight-Stream Moonlight Vita and 1 more.
How do I fix CVE-2023-42800?
No fix has been published for CVE-2023-42800 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-42800 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-42800 exists.
Other vulnerabilities in moonlight-stream moonlight-common-c
Sources
Also known as GHSA-4927-23jw-rq62.