SuperMartijn642's Config Lib is a library used by a number of mods for the game Minecraft. The versions of SuperMartijn642's Config Lib between 1.0.4 and 1.0.8 are affected by a vulnerability and can be exploited on both servers and clients. Using SuperMartijn642's Config Lib, servers will send a packet to clients with the server's config values. In order to read `enum` values from the packet data, `ObjectInputStream#readObject` is used. `ObjectInputStream#readObject` will instantiate a class based on the input data. Since, the packet data is not validated before `ObjectInputStream#readObject` is called, an attacker can instantiate any class by sending a malicious packet. If a suitable class is found, the vulnerability can lead to a number of exploits, including remote code execution. Although the vulnerable packet is typically only send from server to client, it can theoretically also be send from client to server. This means both clients and servers running SuperMartijn642's Config Lib between 1.0.4 and 1.0.8 are vulnerable. The vulnerability has been patched in SuperMartijn642's Config lib 1.0.9. Both, players and server owners, should update to 1.0.9 or higher.
References
Link | Resource |
---|---|
https://github.com/SuperMartijn642/SuperMartijn642sConfigLib/security/advisories/GHSA-f4r5-w453-2jx6 | Third Party Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: GitHub_M
Published: 2021-08-05T20:15:09
Updated: 2021-08-05T20:15:09
Reserved: 2021-07-29T00:00:00
Link: CVE-2021-37632
JSON object: View
NVD Information
Status : Analyzed
Published: 2021-08-05T21:15:12.687
Modified: 2021-08-17T15:00:10.767
Link: CVE-2021-37632
JSON object: View
Redhat Information
No data.
CWE