CVE-2023-41317: Apollo router Apollo Router Unnamed "Subscription" Operation Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-w8vq-3hf9-xppx",
  "modified" : "2023-09-08T21:04:38Z",
  "published" : "2023-09-07T12:58:29Z",
  "aliases" : [ "CVE-2023-41317" ],
  "summary" : "Apollo Router Unnamed \"Subscription\" operation results in Denial-of-Service",
  "details" : "### Impact\n\nThis is a Denial-of-Service (DoS) type vulnerability which causes the Router to panic and terminate when GraphQL Subscriptions are enabled.  It can be triggered when **all of the following conditions are met**:\n\n1. Running Apollo Router v1.28.0, v1.28.1 or v1.29.0 (\"impacted versions\"); **and**\n2. The Supergraph schema provided to the Router (either via Apollo Uplink or explicitly via other configuration) **has a `subscription` type** with root-fields defined; **and**\n3. The YAML configuration provided to the Router **has subscriptions enabled** (they are _disabled_ by default), either by setting `enabled: true` _or_ by setting a valid `mode` within the `subscriptions` object (as seen in [subscriptions' documentation](https://www.apollographql.com/docs/router/executing-operations/subscription-support/#router-setup)); **and**\n4. An [anonymous](https://spec.graphql.org/draft/#sec-Anonymous-Operation-Definitions) (i.e., un-named) `subscription` operation (e.g., `subscription { ... }`) is received by the Router\n\nIf **all four** of these criteria are met, the impacted versions will panic and terminate.  There is no data-privacy risk or sensitive-information exposure aspect to this vulnerability.\n\nDepending on the environment in which impacted versions are running and the high-availability characteristics of that environment, a single Router's termination may result in limited or reduced availability or other knock-on effects which are deployment-specific (e.g., depending on if there are multiple instances, auto-restart policies, etc.)\n\n### Discovery\n\nThis vulnerability was discovered by an internal Apollo team.  We have no reports or evidence to support that that has been exploited outside of our own testing, research and follow-up.\n\nOur public security policy can be reviewed at https://github.com/apollographql/router/security/policy and we consider the security of our projects a top priority.  Please review the linked policy for more details.\n\n### Patches\n\nThis is fixed in [Apollo Router v1.29.1](https://github.com/apollographql/router/releases/tag/v1.29.1), which is available on:\n\n- [GitHub Releases](https://github.com/apollographql/router/releases) as `v1.29.1`\n- [GitHub Packages Container Registry](https://github.com/apollographql/router/pkgs/container/router) as `v1.29.1`\n- [Helm Chart Repository](https://github.com/apollographql/router/pkgs/container/helm-charts%2Frouter) as `1.29.1` (without the `v`)\n\nWe recommend all users running the impacted configuration above to update to a patched version of the Router immediately.  Router v1.29.1 should be a very simple upgrade from any impacted version. \n\n### Workarounds\n\nUpdating to v1.29.1 should be a clear and simple upgrade path for those running impacted versions.  However, if Subscriptions are **not** necessary for your Graph – but are enabled via configuration — then disabling subscriptions is another option to mitigate the risk.\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n\n* Open an issue in [the `router` repository](https://github.com/apollographql/router)\n* Email us at `security` `[at]` `apollographql` `[dot]` `com`",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "apollo-router"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.28.0"
      }, {
        "fixed" : "1.29.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.29.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/apollographql/router/security/advisories/GHSA-w8vq-3hf9-xppx"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-41317"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apollographql/router/commit/b295c103dd86c57c848397d32e8094edfa8502aa"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apollographql/router"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apollographql/router/releases/tag/v1.29.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-755" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-09-07T12:58:29Z",
    "nvd_published_at" : "2023-09-05T19:15:48Z"
  }
}