Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Libp2P | Go-Libp2P | < 0.27.8 |
Related Weaknesses (CWE)
References
- https://github.com/golang/go/commit/2350afd2e8ab054390e284c95d5b089c142db017Not ApplicablePatch
- https://github.com/golang/go/issues/61460Issue TrackingNot ApplicableVendor Advisory
- https://github.com/libp2p/go-libp2p/commit/0cce607219f3710addc7e18672cffd1f1d912Patch
- https://github.com/libp2p/go-libp2p/commit/445be526aea4ee0b1fa5388aa65d32b2816d3Patch
- https://github.com/libp2p/go-libp2p/commit/e30fcf7dfd4715ed89a5e68d7a4f774d3b9aaPatch
- https://github.com/libp2p/go-libp2p/pull/2454ExploitPatchVendor Advisory
- https://github.com/libp2p/go-libp2p/security/advisories/GHSA-876p-8259-xjggPatchVendor Advisory
- https://github.com/quic-go/quic-go/pull/4012PatchThird Party Advisory
- https://github.com/golang/go/commit/2350afd2e8ab054390e284c95d5b089c142db017Not ApplicablePatch
- https://github.com/golang/go/issues/61460Issue TrackingNot ApplicableVendor Advisory
- https://github.com/libp2p/go-libp2p/commit/0cce607219f3710addc7e18672cffd1f1d912Patch
- https://github.com/libp2p/go-libp2p/commit/445be526aea4ee0b1fa5388aa65d32b2816d3Patch
- https://github.com/libp2p/go-libp2p/commit/e30fcf7dfd4715ed89a5e68d7a4f774d3b9aaPatch
- https://github.com/libp2p/go-libp2p/pull/2454ExploitPatchVendor Advisory
- https://github.com/libp2p/go-libp2p/security/advisories/GHSA-876p-8259-xjggPatchVendor Advisory
FAQ
What is CVE-2023-39533?
CVE-2023-39533 is a vulnerability with a CVSS score of 7.5 (HIGH). 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...
How severe is CVE-2023-39533?
CVE-2023-39533 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-39533?
Check the references section above for vendor advisories and patch information. Affected products include: Libp2P Go-Libp2P.