GHSA-mx2j-7cmv-353c: wasmvm Malicious Smart Contract Can Slow Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-mx2j-7cmv-353c",
  "modified" : "2025-07-09T16:06:08Z",
  "published" : "2025-02-04T18:57:21Z",
  "aliases" : [ ],
  "summary" : "wasmvm: Malicious smart contract can slow down block production",
  "details" : "# CWA-2025-002\n\n**Severity**\n\nMedium (Moderate + Likely)[^1]\n\n**Affected versions:**\n\n- wasmvm >= 2.2.0, < 2.2.2\n- wasmvm >= 2.1.0, < 2.1.5\n- wasmvm >= 2.0.0, < 2.0.6\n- wasmvm < 1.5.8\n\n**Patched versions:**\n\n- wasmvm 1.5.8, 2.0.6, 2.1.5, 2.2.2\n\n## Description of the bug\n\nThe vulnerability can be used to slow down block production. The attack requires a malicious contract,\nso permissioned chains are unlikely to be affected.\n\n(We'll add more detail once chains had a chance to upgrade.)\n\n## Patch\n\n- 1.5: https://github.com/CosmWasm/cosmwasm/commit/2b7f2faa57a1efc8207455c37f87f1eee6035a27\n- 2.0: https://github.com/CosmWasm/cosmwasm/commit/d6143b0aff16a39bbea4be37597d8e9d9b213d3b\n- 2.1: https://github.com/CosmWasm/cosmwasm/commit/f0c04c03cbe2557634c1bbcdc2ce203fe7caca58\n- 2.2: https://github.com/CosmWasm/cosmwasm/commit/a5d62f65b5eb947ebe40e2085b1c48a9d0a244d0\n\n## Applying the patch\n\nThe patch will be shipped in releases of wasmvm. You can update more or less as follows:\n\n1. Check the current wasmvm version: `go list -m github.com/CosmWasm/wasmvm`\n2. Bump the `github.com/CosmWasm/wasmvm` dependency in your go.mod to one of the patched version\n   depending on which minor version you are on; `go mod tidy`; commit.\n3. If you use the static libraries `libwasmvm_muslc.aarch64.a`/`libwasmvm_muslc.x86_64.a`, update them accordingly.\n4. Check the updated wasmvm version: `go list -m github.com/CosmWasm/wasmvm` and ensure you see 1.5.8, 2.0.6, 2.1.5 or 2.2.2.\n5. Follow your regular practices to deploy chain upgrades.\n\nThe patch is consensus breaking and requires a coordinated upgrade.\n\n## Acknowledgement\n\nThis issue was found by meadow101 who reported it to the Cosmos Bug Bounty Program on HackerOne.\n\nIf you believe you have found a bug in the Interchain Stack or would like to contribute to the\nprogram by reporting a bug, please see <https://hackerone.com/cosmos>.\n\n## Timeline\n\n- 2024-11-24: Confio receives a report through the Cosmos bug bounty program maintained by Amulet.\n- 2024-12-20: Confio security contributors confirm the report.\n- 2024-01-27: Confio developed the patch internally.\n- 2025-02-04: Patch gets released.\n\n[^1]: following Amulet's Severity Classification Framework ACMv1.2: https://github.com/interchainio/security/blob/0295254e8645301ccb606d46108a45cede0a73e0/resources/CLASSIFICATION_MATRIX.md",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "cosmwasm-vm"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.2.0"
      }, {
        "fixed" : "2.2.1"
      } ]
    } ],
    "versions" : [ "2.2.0" ]
  }, {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "cosmwasm-vm"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.1.0"
      }, {
        "fixed" : "2.1.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "cosmwasm-vm"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0"
      }, {
        "fixed" : "2.0.9"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "cosmwasm-vm"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.5.10"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/CosmWasm/wasmvm"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.1.0"
      }, {
        "fixed" : "1.5.8"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.5.7"
    }
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/CosmWasm/wasmvm/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.2.0"
      }, {
        "fixed" : "2.2.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/CosmWasm/wasmvm/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.1.0"
      }, {
        "fixed" : "2.1.5"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/CosmWasm/wasmvm/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0"
      }, {
        "fixed" : "2.0.6"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.0.5"
    }
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/CosmWasm/wasmvm"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.0.0-20250204093451-1f4db20199b8"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/CosmWasm/wasmvm/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
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        "fixed" : "2.0.0-20250204103256-d62c3b826a9d"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/CosmWasm/wasmvm"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.5.8-0"
      }, {
        "fixed" : "1.5.8-0.20250204093451-1f4db20199b8"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/CosmWasm/wasmvm/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.6-0"
      }, {
        "fixed" : "2.0.6-0.20250204103256-d62c3b826a9d"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/CosmWasm/wasmvm/security/advisories/GHSA-mx2j-7cmv-353c"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/CosmWasm/cosmwasm/commit/2b7f2faa57a1efc8207455c37f87f1eee6035a27"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/CosmWasm/cosmwasm/commit/a5d62f65b5eb947ebe40e2085b1c48a9d0a244d0"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/CosmWasm/cosmwasm/commit/d6143b0aff16a39bbea4be37597d8e9d9b213d3b"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/CosmWasm/cosmwasm/commit/f0c04c03cbe2557634c1bbcdc2ce203fe7caca58"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/CosmWasm/advisories/blob/main/CWAs/CWA-2025-002.md"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/CosmWasm/wasmvm"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2025-3449"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-02-04T18:57:21Z",
    "nvd_published_at" : null
  }
}