CVE-2022-21671 Information

Description

@replit/crosis is a JavaScript client that speaks Replit’s container protocol. A vulnerability that involves exposure of sensitive information exists in versions prior to 7.3.1. When using this library as a way to programmatically communicate with Replit in a standalone fashion if there are multiple failed attempts to contact Replit through a WebSocket the library will attempt to communicate using a fallback poll-based proxy. The URL of the proxy has changed so any communication done to the previous URL could potentially reach a server that is outside of Replit’s control and the token used to connect to the Repl could be obtained by an attacker leading to full compromise of that Repl (not of the account). This was patched in version 7.3.1 by updating the address of the fallback WebSocket polling proxy to the new one. As a workaround a user may specify the new address for the polling host (gp-v2.replit.com) in the ConnectArgs. More information about this workaround is available in the GitHub Security Advisory.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Reference

https://github.com/replit/crosis/security/advisories/GHSA-7w54-gp8x-f33m https://github.com/replit/crosis/commit/e44b6a8f5fa28cb2872e3c19bb8a205bb5bfc281

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

6.5