CVE-2022-31016: Github.com/argoproj/argo cd Denial of Service Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-jhqp-vf4w-rpwq",
  "modified" : "2022-06-21T22:51:05Z",
  "published" : "2022-06-21T22:51:05Z",
  "aliases" : [ "CVE-2022-31016" ],
  "summary" : "DoS through large manifest files in Argo CD",
  "details" : "### Impact\n\nAll versions of Argo CD starting with v0.7.0 are vulnerable to an uncontrolled memory consumption bug, allowing an authorized malicious user to crash the [repo-server](https://argo-cd.readthedocs.io/en/stable/operator-manual/architecture/#repository-server) service. The repo-server is a critical component of Argo CD, so crashing the repo-server effectively denies core Argo CD services (such as syncing Application updates).\n\nTo achieve denial of service, the attacker must be an authenticated Argo CD user authorized to deploy Applications from a repository which contains (or can be made to contain) a large file. \n\n### Patches\n\nA patch for this vulnerability has been released in the following Argo CD versions:\n\n* v2.4.1\n* v2.3.5\n* v2.2.10\n* v2.1.16\n\n**The patch introduces a new `reposerver.max.combined.directory.manifests.size` config parameter, which you should tune before upgrading in production.** It caps the maximum total file size of .yaml/.yml/.json files in directory-type (raw manifest) Applications. The default max is `10M` per Application. This max is designed to keep any single app from consuming more than 3G of memory in the repo-server (manifests consume more space in memory than on disk). The 300x ratio assumes a maliciously-crafted manifest file. If you only want to protect against accidental excessive memory use, it is probably safe to use a smaller ratio.\n\nIf your organization uses directory-type Applications with very many manifests or very large manifests then **check the size of those manifests and tune the config parameter before deploying this change to production**. When testing, make sure to do a \"hard refresh\" in either the CLI or UI to test your directory-type App. That will make sure you're using the new max logic instead of relying on cached manifest responses from Redis.\n\n### Workarounds\n\nThere is no workaround besides upgrading.\n\nTo mitigate the issue, carefully limit 1) who can configure repos (determined by [RBAC](https://argo-cd.readthedocs.io/en/stable/getting_started/)), 2) which repos are allowed (determined by [Project](https://argo-cd.readthedocs.io/en/stable/user-guide/projects/) limitations), and 3) who has push access to those repos (determined by your SCM provider configuration).\n\n### Credits\n\nDisclosed by ADA Logics in a security audit of the Argo project sponsored by CNCF and facilitated by OSTIF. Thanks to Adam Korczynski and David Korczynski for their work on the audit.\n\n### For more information\n\n* Open an issue in [the Argo CD issue tracker](https://github.com/argoproj/argo-cd/issues) or [discussions](https://github.com/argoproj/argo-cd/discussions)\n* Join us on [Slack](https://argoproj.github.io/community/join-slack) in channel #argo-cd\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/argoproj/argo-cd"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.7.0"
      }, {
        "fixed" : "2.1.16"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.8.7"
    }
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/argoproj/argo-cd/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.1.16"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/argoproj/argo-cd/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.2.0"
      }, {
        "fixed" : "2.2.10"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/argoproj/argo-cd/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.3.0"
      }, {
        "fixed" : "2.3.5"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/argoproj/argo-cd/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.4.0"
      }, {
        "fixed" : "2.4.1"
      } ]
    } ],
    "versions" : [ "2.4.0" ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/argoproj/argo-cd/security/advisories/GHSA-jhqp-vf4w-rpwq"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-31016"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/argoproj/argo-cd"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-770" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-06-21T22:51:05Z",
    "nvd_published_at" : "2022-06-25T08:15:00Z"
  }
}