CVE-2023-39533 – github.com/libp2p/go-libp2p

Package

Manager: go
Name: github.com/libp2p/go-libp2p
Vulnerable Version: >=0 <0.27.8 || >=0.28.0 <0.28.2 || =0.29.0 || >=0.29.0 <0.29.1

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS: 0.0011 pctl0.30074

Details

libp2p nodes vulnerable to attack using large RSA keys ### Impact A malicious peer can use large RSA keys to run a resource exhaustion attack & force a node to spend time doing signature verification of the large key. This vulnerability is present in the core/crypto module of go-libp2p and can occur during the Noise handshake and the libp2p x509 extension verification step. To prevent this attack, go-libp2p now restricts RSA keys to <= 8192 bits. ### Patches Users should upgrade their go-libp2p versions to >=v0.27.8, >= v0.28.2, or >=v0.29.1 To protect your application, it's necessary to update to these patch releases **AND** to use the updated Go compiler (1.20.7 or 1.19.12, respectively) ### Workarounds There are no known workarounds ### References The Golang crypto/tls package also had this vulnerability ("verifying certificate chains containing large RSA keys is slow” https://github.com/golang/go/issues/61460) Fix in golang/go crypto/tls: https://github.com/golang/go/commit/2350afd2e8ab054390e284c95d5b089c142db017 Fix in quic-go https://github.com/quic-go/quic-go/pull/4012

Metadata

Created: 2023-08-09T13:18:18Z
Modified: 2023-09-11T18:32:44Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/08/GHSA-876p-8259-xjgg/GHSA-876p-8259-xjgg.json
CWE IDs: ["CWE-770"]
Alternative ID: GHSA-876p-8259-xjgg
Finding: F067
Auto approve: 1