CVE-2021-32742: Github.com/vapor/vapor )` Can Result Vulnerability

MODERATE
Advisory Identifier: GHSA-pqwh-c2f3-vxmq
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CWE-502
Published
Advisory Summary

CVE-2021-32742 is a MODERATE )` can result vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Github.com/vapor/vapor libraries in the SwiftURL ecosystem. The issue involves )` can result in exposing server memory and/or crash. Remediation is available by upgrading affected packages to version 4.47.2.

CVE-2021-32742 at a Glance

CVE Identifier CVE-2021-32742
GHSA Identifier GHSA-pqwh-c2f3-vxmq
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Github.com/vapor/vapor
Package Ecosystem SwiftURL
Published Date
Last Updated

How to Fix CVE-2021-32742

To remediate this vulnerability, upgrade all affected Github.com/vapor/vapor dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/vapor/vapor fixed: 4.47.2 
Upgrade github.com/vapor/vapor to 4.47.2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/vapor/vapor

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-32742, inspect your project dependencies for Github.com/vapor/vapor:

inspect dependencies for github.com/vapor/vapor

Analyze the terminal output to locate any version of Github.com/vapor/vapor in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.47.2), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Github.com/vapor/vapor, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact A bug in the `Data.init(base32Encoded:)` function opens up the potential for exposing server memory and/or crashing the server (Denial of Service) for applications where untrusted data can end up in said function. Vapor does not currently use this function itself so this only impact applications that use the impacted function directly or through other dependencies. ### Patches This issue has been patched in 4.47.2. ### Workarounds Use an alternative to Vapor's built-in `Data.init(base32Encoded:)`. ### For more information If you have any questions or comments about this advisory: * Open an issue in [Vapor](https://github.com/vapor/vapor) * Ask in [Discord](http://vapor.team)

CVE-2021-32742 Affected Github.com/vapor/vapor Versions

1 component(s)
Fixed Versions:
4.47.2
Product / Package Ecosystem Affected Versions Fixed Version
github.com/vapor/vapor
 SwiftURL
< 4.47.2
4.47.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/vapor/vapor/security/advisories/GHSA-pqwh-c2f3-vxmq
NVD — CVE-2021-32742 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-32742
Github.com/vapor/vapor Source Repository REPOSITORY
https://github.com/vapor/vapor
Github.com/vapor/vapor Release RELEASE
https://github.com/vapor/vapor/releases/tag/4.47.2

Frequently Asked Questions

What is CVE-2021-32742?
CVE-2021-32742 is a security vulnerability in Github.com/vapor/vapor involving )` can result in exposing server memory and/or crash under CWE-502: Deserialization of Untrusted Data.
Which Github.com/vapor/vapor versions are affected?
Affected versions include releases prior to 4.47.2 across affected packages: github.com/vapor/vapor.
What version fixes CVE-2021-32742?
Upgrading to 4.47.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/vapor/vapor affected?
Yes, github.com/vapor/vapor is affected in releases prior to 4.47.2. Upgrade your dependency to 4.47.2 or later.
What CWE is associated with CVE-2021-32742?
CVE-2021-32742 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check SwiftURL dependencies for CVE-2021-32742?
Run the dependency tree command: 'inspect dependencies for github.com/vapor/vapor'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-pqwh-c2f3-vxmq",
  "modified" : "2023-06-09T19:31:54Z",
  "published" : "2023-06-09T19:31:54Z",
  "aliases" : [ "CVE-2021-32742" ],
  "summary" : "Untrusted data fed into `Data.init(base32Encoded:)` can result in exposing server memory and/or crash",
  "details" : "### Impact\nA bug in the `Data.init(base32Encoded:)` function opens up the potential for exposing server memory and/or crashing the server (Denial of Service) for applications where untrusted data can end up in said function. Vapor does not currently use this function itself so this only impact applications that use the impacted function directly or through other dependencies.\n\n### Patches\nThis issue has been patched in 4.47.2.\n\n### Workarounds\nUse an alternative to Vapor's built-in `Data.init(base32Encoded:)`.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [Vapor](https://github.com/vapor/vapor)\n* Ask in [Discord](http://vapor.team)",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "SwiftURL",
      "name" : "github.com/vapor/vapor"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.47.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/vapor/vapor/security/advisories/GHSA-pqwh-c2f3-vxmq"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-32742"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/vapor/vapor"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vapor/vapor/releases/tag/4.47.2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-502" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-06-09T19:31:54Z",
    "nvd_published_at" : "2021-07-09T14:15:00Z"
  }
}