Vulnerability · Published Aug 1, 2022 · Assigned by GitHub_M

CVE-2022-31183mTLS client verification is skipped in fs2 on Node.js

Critical 9.1

In plain English

A critical-severity improper certificate validation in fs2 from typelevel. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.1Critical

Exploit odds (30 days)0.8%top 42.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

fs2 is a compositional, streaming I/O library for Scala. 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. `TLSSocket`s in server-mode. Client-mode `TLSSocket`s are implemented via a different API. 3. mTLS as enabled via `requestCert = true` in `TLSParameters`. The default setting is `false` for server-mode `TLSSocket`s. It was introduced with the initial Node.js implementation of fs2-io in 3.1.0. 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. If using an unpatched version on Node.js, do not use a server-mode TLSSocket with requestCert = true to establish a mTLS connection.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Maven	co.fs2:fs2-io	3.2.11	GHSA-2cpx-6pqp-wf35
Maven	co.fs2:fs2-io_2.12	3.2.11	GHSA-2cpx-6pqp-wf35
Maven	co.fs2:fs2-io_2.13	3.2.11	GHSA-2cpx-6pqp-wf35
Maven	co.fs2:fs2-io_3	3.2.11	GHSA-2cpx-6pqp-wf35
Maven	co.fs2:fs2-io_sjs1_2.13	3.2.11	GHSA-2cpx-6pqp-wf35
Maven	co.fs2:fs2-io_sjs1_3	3.2.11	GHSA-2cpx-6pqp-wf35

Affected products (as reported)

Vendor	Product	Versions
typelevel	fs2	>= 3.1.0, < 3.2.11

Weakness: CWE-295 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References

https://github.com/typelevel/fs2/security/advisories/GHSA-2cpx-6pqp-wf35 x_refsource_CONFIRM
https://github.com/nodejs/node/issues/43994 x_refsource_MISC
https://github.com/typelevel/fs2/commit/659824395826a314e0a4331535dbf1ef8bef8207 x_refsource_MISC