GHSA-Q6CP-QFWQ-4GCV

Vulnerability from github – Published: 2024-04-05 15:05 – Updated: 2024-04-05 15:05
VLAI
Summary
h2 servers vulnerable to degradation of service with CONTINUATION Flood
Details

An attacker can send a flood of CONTINUATION frames, causing h2 to process them indefinitely. This results in an increase in CPU usage.

Tokio task budget helps prevent this from a complete denial-of-service, as the server can still respond to legitimate requests, albeit with increased latency.

More details at https://seanmonstar.com/blog/hyper-http2-continuation-flood/.

Patches available for 0.4.x and 0.3.x versions.

Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "h2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.3.26"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "h2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.4.0"
            },
            {
              "fixed": "0.4.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-04-05T15:05:32Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "An attacker can send a flood of CONTINUATION frames, causing `h2` to process them indefinitely. This results in an increase in CPU usage.\n\nTokio task budget helps prevent this from a complete denial-of-service, as the server can still respond to legitimate requests, albeit with increased latency.\n\nMore details at https://seanmonstar.com/blog/hyper-http2-continuation-flood/.\n\nPatches available for 0.4.x and 0.3.x versions.\n",
  "id": "GHSA-q6cp-qfwq-4gcv",
  "modified": "2024-04-05T15:05:32Z",
  "published": "2024-04-05T15:05:32Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://github.com/hyperium/h2"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2024-0332.html"
    },
    {
      "type": "WEB",
      "url": "https://seanmonstar.com/blog/hyper-http2-continuation-flood"
    },
    {
      "type": "WEB",
      "url": "https://www.kb.cert.org/vuls/id/421644"
    }
  ],
  "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:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "h2 servers vulnerable to degradation of service with CONTINUATION Flood"
}



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