ghsa-876p-8259-xjgg
Vulnerability from github
Published
2023-08-09 13:18
Modified
2023-09-11 18:32
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
libp2p nodes vulnerable to attack using large RSA keys
Details

Impact

A 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 now restricts RSA keys to <= 8192 bits.

Patches

Users should upgrade their go-libp2p versions to >=v0.27.8, >= v0.28.2, or >=v0.29.1 To protect your application, it's necessary to update to these patch releases AND to use the updated Go compiler (1.20.7 or 1.19.12, respectively)

Workarounds

There are no known workarounds

References

The Golang crypto/tls package also had this vulnerability ("verifying certificate chains containing large RSA keys is slow” https://github.com/golang/go/issues/61460) Fix in golang/go crypto/tls: https://github.com/golang/go/commit/2350afd2e8ab054390e284c95d5b089c142db017 Fix in quic-go https://github.com/quic-go/quic-go/pull/4012

Show details on source website

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/libp2p/go-libp2p"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.27.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/libp2p/go-libp2p"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.28.0"
            },
            {
              "fixed": "0.28.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/libp2p/go-libp2p"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.29.0"
            },
            {
              "fixed": "0.29.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.29.0"
      ]
    }
  ],
  "aliases": [
    "CVE-2023-39533"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-08-09T13:18:18Z",
    "nvd_published_at": "2023-08-08T19:15:10Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nA malicious peer can use large RSA keys to run a resource exhaustion attack \u0026 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.\nTo prevent this attack, go-libp2p now restricts RSA keys to \u003c= 8192 bits.\n\n### Patches\nUsers should upgrade their go-libp2p versions to \u003e=v0.27.8, \u003e= v0.28.2, or \u003e=v0.29.1\nTo protect your application, it\u0027s necessary to update to these patch releases **AND** to use the updated Go compiler (1.20.7 or 1.19.12, respectively)\n\n### Workarounds\nThere are no known workarounds\n\n### References\nThe Golang crypto/tls package also had this vulnerability (\"verifying certificate chains containing large RSA keys is slow\u201d https://github.com/golang/go/issues/61460)\nFix in golang/go crypto/tls: https://github.com/golang/go/commit/2350afd2e8ab054390e284c95d5b089c142db017\nFix in quic-go https://github.com/quic-go/quic-go/pull/4012\n",
  "id": "GHSA-876p-8259-xjgg",
  "modified": "2023-09-11T18:32:44Z",
  "published": "2023-08-09T13:18:18Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/libp2p/go-libp2p/security/advisories/GHSA-876p-8259-xjgg"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-39533"
    },
    {
      "type": "WEB",
      "url": "https://github.com/golang/go/issues/61460"
    },
    {
      "type": "WEB",
      "url": "https://github.com/libp2p/go-libp2p/pull/2454"
    },
    {
      "type": "WEB",
      "url": "https://github.com/quic-go/quic-go/pull/4012"
    },
    {
      "type": "WEB",
      "url": "https://github.com/golang/go/commit/2350afd2e8ab054390e284c95d5b089c142db017"
    },
    {
      "type": "WEB",
      "url": "https://github.com/libp2p/go-libp2p/commit/0cce607219f3710addc7e18672cffd1f1d912fbb"
    },
    {
      "type": "WEB",
      "url": "https://github.com/libp2p/go-libp2p/commit/445be526aea4ee0b1fa5388aa65d32b2816d3a00"
    },
    {
      "type": "WEB",
      "url": "https://github.com/libp2p/go-libp2p/commit/e30fcf7dfd4715ed89a5e68d7a4f774d3b9aa92d"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/libp2p/go-libp2p"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/issue/61460"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "libp2p nodes vulnerable to attack using large RSA keys"
}


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