GHSA-C24F-2J3G-RG48

Vulnerability from github – Published: 2023-03-20 21:26 – Updated: 2023-03-20 21:26
VLAI
Summary
kaml has potential denial of service while parsing input with anchors and aliases
Details

Impact

Applications that use kaml to parse untrusted input containing anchors and aliases may consume excessive memory and crash.

Patches

Version 0.53.0 and later default to refusing to parse YAML documents containing anchors and aliases.

Workarounds

None.

References

Wikipedia has an explanation of this class of vulnerability: billion laughs attack

Acknowledgements

Thank you to @gdude2002 for reporting this issue.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "com.charleskorn.kaml:kaml"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.53.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-28118"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-776"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-03-20T21:26:59Z",
    "nvd_published_at": "2023-03-20T13:15:00Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nApplications that use kaml to parse untrusted input containing anchors and aliases may consume excessive memory and crash.\n\n### Patches\nVersion 0.53.0 and later default to refusing to parse YAML documents containing anchors and aliases.\n\n### Workarounds\nNone.\n\n### References\nWikipedia has an explanation of this class of vulnerability: [billion laughs attack](https://en.wikipedia.org/wiki/Billion_laughs_attack)\n\n### Acknowledgements\nThank you to @gdude2002 for reporting this issue.",
  "id": "GHSA-c24f-2j3g-rg48",
  "modified": "2023-03-20T21:26:59Z",
  "published": "2023-03-20T21:26:59Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/charleskorn/kaml/security/advisories/GHSA-c24f-2j3g-rg48"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-28118"
    },
    {
      "type": "WEB",
      "url": "https://github.com/charleskorn/kaml/commit/5f82a2d7e00bfc307afca05d1dc4d7c50593531a"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/charleskorn/kaml"
    },
    {
      "type": "WEB",
      "url": "https://github.com/charleskorn/kaml/releases/tag/0.53.0"
    }
  ],
  "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": "kaml has potential denial of service while parsing input with anchors and aliases "
}


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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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