mTLS client verification is skipped in fs2 on Node.js
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 3.2.11
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: poc
- Automatable: yes
- Technical impact: total
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: poc · Automatable: yes · Technical impact: total
- Record last updated
Affected versions
- typelevel fs2
From 3.1.0 · fixed in 3.2.11
- co.fs2:fs2-ioMaven
From 3.1.0 · fixed in 3.2.11
- co.fs2:fs2-io_2.12Maven
From 3.1.0 · fixed in 3.2.11
- co.fs2:fs2-io_3Maven
From 3.1.0 · fixed in 3.2.11
- co.fs2:fs2-io_2.13Maven
From 3.1.0 · fixed in 3.2.11
- co.fs2:fs2-io_sjs1_2.13Maven
From 3.1.0 · fixed in 3.2.11
- co.fs2:fs2-io_sjs1_3Maven
From 3.1.0 · fixed in 3.2.11