CVE-2023-39533
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.50%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.50% probability · 73th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-770
- Affected
- libp2p/go-libp2p
- Source
- security-advisories@github.com
References
- https://github.com/golang/go/commit/2350afd2e8ab054390e284c95d5b089c142db017Not Applicable, Patch
- https://github.com/golang/go/issues/61460Issue Tracking, Not Applicable, Vendor Advisory
- https://github.com/libp2p/go-libp2p/commit/0cce607219f3710addc7e18672cffd1f1d912fbbPatch
- https://github.com/libp2p/go-libp2p/commit/445be526aea4ee0b1fa5388aa65d32b2816d3a00Patch
- https://github.com/libp2p/go-libp2p/commit/e30fcf7dfd4715ed89a5e68d7a4f774d3b9aa92dPatch
- https://github.com/libp2p/go-libp2p/pull/2454Exploit, Patch, Vendor Advisory
- https://github.com/libp2p/go-libp2p/security/advisories/GHSA-876p-8259-xjggPatch, Vendor Advisory
- https://github.com/quic-go/quic-go/pull/4012Patch, Third Party Advisory
- https://nrdax.com/techniques/NRDAX-T0205-pre-handshake-crypto-cpu-burn
- https://github.com/golang/go/commit/2350afd2e8ab054390e284c95d5b089c142db017Not Applicable, Patch
- https://github.com/golang/go/issues/61460Issue Tracking, Not Applicable, Vendor Advisory
- https://github.com/libp2p/go-libp2p/commit/0cce607219f3710addc7e18672cffd1f1d912fbbPatch
- https://github.com/libp2p/go-libp2p/commit/445be526aea4ee0b1fa5388aa65d32b2816d3a00Patch
- https://github.com/libp2p/go-libp2p/commit/e30fcf7dfd4715ed89a5e68d7a4f774d3b9aa92dPatch
- https://github.com/libp2p/go-libp2p/pull/2454Exploit, Patch, Vendor Advisory
- https://github.com/libp2p/go-libp2p/security/advisories/GHSA-876p-8259-xjggPatch, Vendor Advisory
- https://github.com/quic-go/quic-go/pull/4012Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.