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GHSA-7w54-gp8x-f33m

MediumCVSS 6.5 / 10
Published Jan 12, 2022·Last modified Nov 8, 2023
Affected Components(0)

No affected components available

Description

Impact

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).

Patches

This was patched in 7.3.1, by updating the address of the fallback WebSocket polling proxy to the new one.

Workarounds

Specify the new address for the polling host (gp-v2.replit.com) in the ConnectArgs:

const connectOptions: ConnectArgs = {
  // ...
  pollingHost: 'gp-v2.replit.com',
};
client.connect(connectOptions);

For more information

Thanks to https://hackerone.com/orlserg for disclosing this.

If you have any questions or comments about this advisory:

Risk Scores
Base Score
6.5

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information.

Threat Intelligence
6.0

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
0.97%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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