CVE-2021-39177

Geyser is a bridge between Minecraft: Bedrock Edition and Minecraft: Java Edition. Versions of Geyser prior to 1.4.2-SNAPSHOT allow anyone that can connect to the server to forge a LoginPacket with manipulated JWT token allowing impersonation as any user. Version 1.4.2-SNAPSHOT contains a patch for the issue. There are no known workarounds aside from upgrading.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/GeyserMC/Geyser/security/advisories/GHSA-h77f-xxx7-4858	Patch Third Party Advisory
https://github.com/GeyserMC/Geyser/commit/b9541505af68ac7b7c093206ac7b1ba88957a5a6	Patch Third Party Advisory
https://updates.playhive.com/weekend-maintenance-disclosure-2kJMaY	Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:geysermc:geyser:*:*:*:*:*:*:*:*

Information

Published : 2021-08-30 16:15

Updated : 2021-09-10 07:30

NVD link : CVE-2021-39177

Mitre link : CVE-2021-39177

JSON object : View

CWE

CWE-287

Improper Authentication

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Products Affected

geysermc

geyser

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