CVE-2022-31019: Github.com/vapor/vapor Denial of Service Vulnerability
HIGHCVE-2022-31019 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-121: Stack-based Buffer Overflow) affecting Github.com/vapor/vapor libraries in the SwiftURL ecosystem. The issue involves vapor vulnerable to denial of service in urlencodedformdecoder. Remediation is available by upgrading affected packages to version 4.61.1.
CVE-2022-31019 at a Glance
Security Impact
CVSS: 7.5
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
How to Fix CVE-2022-31019
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.
Upgrade github.com/vapor/vapor to 4.61.1Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/vapor/vaporHow to Check if You Are Affected
To determine whether your application is affected by CVE-2022-31019, inspect your project dependencies for Github.com/vapor/vapor:
inspect dependencies for github.com/vapor/vaporAnalyze 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 4.61.1), 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-121: Stack-based Buffer Overflow, where a stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). 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
CVE-2022-31019 Affected Github.com/vapor/vapor Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/vapor/vapor
|
SwiftURL |
< 4.61.1
|
4.61.1
|
References
Frequently Asked Questions
What is CVE-2022-31019?
Which Github.com/vapor/vapor versions are affected?
What version fixes CVE-2022-31019?
Is github.com/vapor/vapor affected?
What is the CVSS score of CVE-2022-31019?
What CWE is associated with CVE-2022-31019?
How can I check SwiftURL dependencies for CVE-2022-31019?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-qvxg-wjxc-r4gg",
"modified" : "2023-06-07T16:11:16Z",
"published" : "2023-06-07T16:11:16Z",
"aliases" : [ "CVE-2022-31019" ],
"summary" : "Vapor vulnerable to denial of service in URLEncodedFormDecoder",
"details" : "Vapor is an HTTP web framework for Swift. Vapor versions earlier than 4.61.1 are vulnerable to a denial of service in the URLEncodedFormDecoder.\n\n### Impact\nWhen using automatic content decoding, e.g. \n\n```swift\napp.post(\"foo\") { request -> String in\n let foo = try request.content.decode(Foo.self)\n return \"\\(foo)\"\n}\n```\n\nAn attacker can craft a request body that can make the server crash with the following request:\n\n```\ncurl -d \"array[_0][0][array][_0][0][array]$(for f in $(seq 1100); do echo -n '[_0][0][array]'; done)[string][_0]=hello%20world\" http://localhost:8080/foo\n```\n\nThe issue is unbounded, attacker controlled stack growth which will at some point lead to a stack overflow.\n\n### Patches\nFixed in 4.61.1\n\n### Workarounds\nIf you don't need to decode Form URL Encoded data, you can disable the `ContentConfiguration` so it won't be used. E.g. in **configure.swift**\n\n```swift\nvar contentConfig = ContentConfiguration()\ncontentConfig.use(encoder: JSONEncoder.custom(dates: .iso8601), for: .json)\ncontentConfig.use(decoder: JSONDecoder.custom(dates: .iso8601), for: .json)\ncontentConfig.use(encoder: JSONEncoder.custom(dates: .iso8601), for: .jsonAPI)\ncontentConfig.use(decoder: JSONDecoder.custom(dates: .iso8601), for: .jsonAPI)\nContentConfiguration.global = contentConfig\n```\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [the Vapor repo](https://github.com/vapor/vapor)\n* Ask in [Vapor Discord](http://vapor.team)",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "SwiftURL",
"name" : "github.com/vapor/vapor"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "4.61.1"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/vapor/vapor/security/advisories/GHSA-qvxg-wjxc-r4gg"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-31019"
}, {
"type" : "WEB",
"url" : "https://github.com/vapor/vapor/commit/6c63226a4ab82ce53730eb1afb9ca63866fcf033"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/vapor/vapor"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-120", "CWE-121", "CWE-674" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2023-06-07T16:11:16Z",
"nvd_published_at" : "2022-06-09T13:15:00Z"
}
}