libp2p nodes vulnerable to attack using large RSA keys
CVE-2023-39533

7.5HIGH

Key Information:

Vendor

Libp2p

Status
Go-libp2p
Vendor
CVE Published:
8 August 2023

What is CVE-2023-39533?

A resource exhaustion vulnerability exists in the core/crypto module of go-libp2p, allowing a malicious peer to exploit large RSA keys in a manner that forces a node to spend excessive time on signature verification during the Noise handshake and the libp2p x509 extension verification. To mitigate this issue, it is essential to upgrade to go-libp2p versions 0.27.8, 0.28.2, or 0.29.1. Additionally, users are advised to utilize the updated Go compiler versions 1.20.7 or 1.19.12. Currently, there are no known workarounds for this vulnerability.

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Deploy the Patch

Affected Version(s)

go-libp2p < 0.27.8 < 0.27.8

go-libp2p >= 0.28.0, < 0.28.2 < 0.28.0, 0.28.2

go-libp2p = 0.29.0 = 0.29.0

References

https://github.com/libp2p/go-libp2p/security/advisories/G...
x_refsource_CONFIRM
https://github.com/golang/go/issues/61460
x_refsource_MISC
https://github.com/libp2p/go-libp2p/pull/2454
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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