CVE-2024-23838: TrueLayer.Client TrueLayer.Client SSRF When Fetching Payment Vulnerability

HIGH
Advisory Identifier: GHSA-67m4-qxp3-j6hh
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CVSS 8.6
CWE-918
Published
Advisory Summary

CVE-2024-23838 is a HIGH (CVSS 8.6) truelayer.client ssrf when fetching payment vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting TrueLayer.Client libraries in the NuGet ecosystem. The issue involves truelayer.client ssrf when fetching payment or payment provider. Remediation is available by upgrading affected packages to version 1.6.0.

CVE-2024-23838 at a Glance

CVE Identifier CVE-2024-23838
GHSA Identifier GHSA-67m4-qxp3-j6hh
Severity HIGH
CVSS v3.1 Base Score 8.6
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product TrueLayer.Client
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 8.6

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2024-23838

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

TrueLayer.Client fixed: 1.6.0 
Upgrade TrueLayer.Client to 1.6.0
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 TrueLayer.Client

How to Check if You Are Affected

To determine whether your application is affected by CVE-2024-23838, inspect your project dependencies for TrueLayer.Client:

inspect dependencies for TrueLayer.Client

Analyze the terminal output to locate any version of TrueLayer.Client in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.6.0), 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-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. In TrueLayer.Client, 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 The vulnerability could potentially allow a malicious actor to gain control over the destination URL of the HttpClient used in the API classes. For applications using the SDK, requests to unexpected resources on local networks or to the internet could be made which could lead to information disclosure. ### Patches Versions of TrueLayer.Client `v1.6.0` and later are not affected. ### Workarounds The issue can be mitigated by having strict egress rules limiting the destinations to which requests can be made, and applying strict validation to any user input passed to the TrueLayer.Client library.

CVE-2024-23838 Affected TrueLayer.Client Versions

1 component(s)
Fixed Versions:
1.6.0
Product / Package Ecosystem Affected Versions Fixed Version
TrueLayer.Client
nuget/TrueLayer.Client
NuGet
< 1.6.0
1.6.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/TrueLayer/truelayer-dotnet/security/advisories/GHSA-67m4-qxp3-j6hh
NVD — CVE-2024-23838 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-23838
Security Fix Commit FIX COMMIT
https://github.com/TrueLayer/truelayer-dotnet/commit/75e436ed5360faa73d6e7ce3a9903a3c49505e3e
TrueLayer.Client Source Repository REPOSITORY
https://github.com/TrueLayer/truelayer-dotnet

Frequently Asked Questions

What is CVE-2024-23838?
CVE-2024-23838 is a security vulnerability in TrueLayer.Client involving TrueLayer.Client SSRF when fetching payment or payment provider under CWE-918: Server-Side Request Forgery (SSRF).
Which TrueLayer.Client versions are affected?
Affected versions include releases prior to 1.6.0 across affected packages: TrueLayer.Client.
What version fixes CVE-2024-23838?
Upgrading to 1.6.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is TrueLayer.Client affected?
Yes, TrueLayer.Client is affected in releases prior to 1.6.0. Upgrade your dependency to 1.6.0 or later.
What is the CVSS score of CVE-2024-23838?
CVE-2024-23838 has a CVSS v3.1 base score of 8.6 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.
What CWE is associated with CVE-2024-23838?
CVE-2024-23838 is classified under CWE-918: Server-Side Request Forgery (SSRF) (The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.).
How can I check NuGet dependencies for CVE-2024-23838?
Run the dependency tree command: 'inspect dependencies for TrueLayer.Client'. 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-67m4-qxp3-j6hh",
  "modified" : "2024-01-30T20:57:59Z",
  "published" : "2024-01-30T20:57:59Z",
  "aliases" : [ "CVE-2024-23838" ],
  "summary" : "TrueLayer.Client SSRF when fetching payment or payment provider",
  "details" : "### Impact\nThe vulnerability could potentially allow a malicious actor to gain control over the destination URL of the HttpClient used in the API classes. For applications using the SDK, requests to unexpected resources on local networks or to the internet could be made which could lead to information disclosure.\n\n### Patches\nVersions of TrueLayer.Client `v1.6.0` and later are not affected.\n\n### Workarounds\nThe issue can be mitigated by having strict egress rules limiting the destinations to which requests can be made, and applying strict validation to any user input passed to the TrueLayer.Client library.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "TrueLayer.Client"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.6.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/TrueLayer/truelayer-dotnet/security/advisories/GHSA-67m4-qxp3-j6hh"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-23838"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TrueLayer/truelayer-dotnet/commit/75e436ed5360faa73d6e7ce3a9903a3c49505e3e"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/TrueLayer/truelayer-dotnet"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-01-30T20:57:59Z",
    "nvd_published_at" : "2024-01-30T17:15:11Z"
  }
}