Resource exhaustion in Libp2p Go-Libp2p
CVE-2023-39533
go-libp2p is the Go implementation of the libp2p Networking Stack. Prior to versions 0.27.8, 0.28.2, and 0.29.1 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 versions 0.27.8, 0.28.2, and 0.29.1 restrict RSA keys to <= 8192 bits. To protect one's application, it is necessary to update to these patch releases and to use the updated Go compiler in 1.20.7 or 1.19.12. There are no known workarounds for this issue.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.015 (73.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000
Affected products
- Libp2p Go-Libp2p — versions 0.29.0, = 0.29.0, < 0.27.8
Weakness classification (CWE)
References
- github.com/libp2p/go-libp2p/security/advisories/GHSA-876p-8259-xjgg (Patch, Vendor Advisory)
- github.com/golang/go/issues/61460 (Issue Tracking, Not Applicable, Vendor Advisory)
- github.com/libp2p/go-libp2p/pull/2454 (Exploit, Patch, Vendor Advisory)
- github.com/quic-go/quic-go/pull/4012 (Patch, Third Party Advisory)
- github.com/golang/go/commit/2350afd2e8ab054390e284c95d5b089c142db017 (Patch, Not Applicable)
- github.com/libp2p/go-libp2p/commit/0cce607219f3710addc7e18672cffd1f1d912fbb (Patch)
- github.com/libp2p/go-libp2p/commit/445be526aea4ee0b1fa5388aa65d32b2816d3a00 (Patch)
- github.com/libp2p/go-libp2p/commit/e30fcf7dfd4715ed89a5e68d7a4f774d3b9aa92d (Patch)
- nrdax.com/techniques/NRDAX-T0205-pre-handshake-crypto-cpu-burn
Frequently asked questions
- What is CVE-2023-39533?
- CVE-2023-39533 is a high-severity vulnerability in Libp2p Go-Libp2p, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2023-08-08.
- How severe is CVE-2023-39533?
- High severity. CVSS v3 base score is 7.5 out of 10.