{"id":"CVE-2023-42800","aliases":["EUVD-2023-47227","GHSA-4927-23jw-rq62"],"status":"published","title":"Buffer overflow due to use of `strcpy` in `performRtspHandshake`","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.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01881,"percentile":0.79618,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-120"],"published":"2023-12-14T16:57:44Z","modified":"2026-10-28T10:38:57Z","products":[{"vendor":"moonlight-stream","product":"moonlight"},{"vendor":"moonlight-stream","product":"moonlight-common-c"},{"vendor":"moonlight-stream","product":"moonlight_embedded"},{"vendor":"moonlight-stream","product":"moonlight_switch"},{"vendor":"moonlight-stream","product":"moonlight_tv"},{"vendor":"moonlight-stream","product":"moonlight_vita"},{"vendor":"moonlight-stream","product":"moonlight_xbox"}],"references":[{"url":"https://github.com/moonlight-stream/moonlight-common-c/security/advisories/GHSA-4927-23jw-rq62","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Third Party Advisory","advisory"]},{"url":"https://github.com/moonlight-stream/moonlight-common-c/commit/24750d4b748fefa03d09fcfd6d45056faca354e0","tags":["x_refsource_MISC","x_transferred","Patch","fix"]},{"url":"https://github.com/moonlight-stream/moonlight-common-c/commit/50c0a51b10ecc5b3415ea78c21d96d679e2288f9","tags":["x_refsource_MISC","x_transferred","Patch","fix"]},{"url":"https://github.com/moonlight-stream/moonlight-common-c/blob/2bb026c763fc18807d7e4a93f918054c488f84e1/src/RtspConnection.c#L796","tags":["x_refsource_MISC","x_transferred","Product","web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/42xxx/CVE-2023-42800.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-42800","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-42800","title":"Buffer overflow due to use of `strcpy` in `performRtspHandshake`","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.","status":"published","published":"2023-12-14T16:57:44.846Z","modified":"2024-11-27T15:50:13.246Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:35:17.812395Z"}],"euvd":[{"id":"EUVD-2023-47227","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.","status":"published","published":"2023-12-14T16:57:44Z","modified":"2024-11-27T15:50:13Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T00:04:45.657538Z"}],"nvd":[{"id":"CVE-2023-42800","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.","status":"published","published":"2023-12-14T17:15:07.463Z","modified":"2026-06-17T06:24:32.347Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:08:54.696438Z"}],"osv":[{"id":"CVE-2023-42800","title":"Buffer overflow due to use of `strcpy` in `performRtspHandshake`","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.","status":"published","published":"2023-12-14T16:57:44.846Z","modified":"2026-10-28T10:38:57.437728452Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T15:44:33.792101Z"}]}}