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GHSA-2cpx-6pqp-wf35

CriticalCVSS 9.8 / 10
Published Jul 29, 2022·Last modified Sep 30, 2025
Affected Components(0)

No affected components available

Description

Impact

When establishing a server-mode TLSSocket using fs2-io on Node.js, the parameter requestCert = true is ignored, peer certificate verification is skipped, and the connection proceeds.

The vulnerability is limited to:

  1. fs2-io running on Node.js. The JVM TLS implementation is completely independent.
  2. TLSSockets in server-mode. Client-mode TLSSockets are implemented via a different API.
  3. mTLS as enabled via requestCert = true in TLSParameters. The default setting is false for server-mode TLSSockets.

It was introduced with the initial Node.js implementation of fs2-io in v3.1.0.

Patches

A patch is released in v3.2.11. The requestCert = true parameter is respected and the peer certificate is verified. If verification fails, a SSLException is raised.

Workarounds

If using an unpatched version on Node.js, do not use a server-mode TLSSocket with requestCert = true to establish a mTLS connection.

References

  • https://github.com/nodejs/node/issues/43994
  • https://www.cloudflare.com/learning/access-management/what-is-mutual-tls/

For more information

If you have any questions or comments about this advisory:

Risk Scores
Base Score
9.8

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. 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. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.

Threat Intelligence
9.0

Active exploitation in the wild has been confirmed. Immediate patching or mitigation is required.

EPSS
0.64%

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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Critical severity
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