CVE-2023-39533

2023-10-0414:25:32

redhat.com

access.redhat.com

go-libp2p

rsa key

resource exhaustion

8192 bits

noise handshake

libp2p

package flaw

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.001 Low

EPSS

Percentile

44.0%

JSON

A flaw was found in the go-libp2p package. A malicious peer can use large RSA keys to run a resource exhaustion attack and force a node to spend time doing signature verification of the large key. This issue 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.