CVE-2023-32571: System.Linq.Dynamic.Core Remote Code Execution Vulnerability

CRITICAL
Advisory Identifier: GHSA-w65q-jcmv-28gj
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CVSS 9.8
CWE-697
Published
Advisory Summary

CVE-2023-32571 is a CRITICAL (CVSS 9.8) remote code execution vulnerability (CWE-697: Incorrect Comparison) affecting System.Linq.Dynamic.Core libraries in the NuGet ecosystem. The issue involves dynamic linq vulnerable to remote code execution. Remediation is available by upgrading affected packages to version 1.3.0.

CVE-2023-32571 at a Glance

CVE Identifier CVE-2023-32571
GHSA Identifier GHSA-w65q-jcmv-28gj
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-697: Incorrect Comparison
Affected Product System.Linq.Dynamic.Core
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:H/I:H/A:H).

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

How to Fix CVE-2023-32571

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

System.Linq.Dynamic.Core fixed: 1.3.0 
Upgrade System.Linq.Dynamic.Core to 1.3.0
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 System.Linq.Dynamic.Core

How to Check if You Are Affected

To determine whether your application is affected by CVE-2023-32571, inspect your project dependencies for System.Linq.Dynamic.Core:

inspect dependencies for System.Linq.Dynamic.Core

Analyze the terminal output to locate any version of System.Linq.Dynamic.Core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.3.0), 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-697: Incorrect Comparison, where the product compares two entities in a security-relevant context, but the comparison is incorrect. In System.Linq.Dynamic.Core, 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

Dynamic Linq 1.0.7.10 through 1.2.25 before 1.3.0 allows attackers to execute arbitrary code and commands when untrusted input to methods including Where, Select, OrderBy is parsed.

CVE-2023-32571 Affected System.Linq.Dynamic.Core Versions

1 component(s)
Fixed Versions:
1.3.0
Product / Package Ecosystem Affected Versions Fixed Version
System.Linq.Dynamic.Core
nuget/System.Linq.Dynamic.Core
NuGet
≥ 1.0.7.10
< 1.3.0
1.3.0

References

NVD — CVE-2023-32571 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-32571
System.Linq.Dynamic.Core Source Repository REPOSITORY
https://github.com/zzzprojects/System.Linq.Dynamic.Core
research.nccgroup.com/2023/06/13/dynamic-... WEB
https://research.nccgroup.com/2023/06/13/dynamic-linq-injection-remote-code-execution-vulnerability-cve-2023-32571

Frequently Asked Questions

What is CVE-2023-32571?
CVE-2023-32571 is a security vulnerability in System.Linq.Dynamic.Core involving Dynamic Linq vulnerable to remote code execution under CWE-697: Incorrect Comparison.
Which System.Linq.Dynamic.Core versions are affected?
Affected versions include releases prior to 1.3.0 across affected packages: System.Linq.Dynamic.Core.
What version fixes CVE-2023-32571?
Upgrading to 1.3.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is System.Linq.Dynamic.Core affected?
Yes, System.Linq.Dynamic.Core is affected in releases prior to 1.3.0. Upgrade your dependency to 1.3.0 or later.
What is the CVSS score of CVE-2023-32571?
CVE-2023-32571 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2023-32571?
CVE-2023-32571 is classified under CWE-697: Incorrect Comparison (The product compares two entities in a security-relevant context, but the comparison is incorrect.).
How can I check NuGet dependencies for CVE-2023-32571?
Run the dependency tree command: 'inspect dependencies for System.Linq.Dynamic.Core'. 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-w65q-jcmv-28gj",
  "modified" : "2023-07-03T21:34:40Z",
  "published" : "2023-06-22T21:30:49Z",
  "aliases" : [ "CVE-2023-32571" ],
  "summary" : "Dynamic Linq vulnerable to remote code execution",
  "details" : "Dynamic Linq 1.0.7.10 through 1.2.25 before 1.3.0 allows attackers to execute arbitrary code and commands when untrusted input to methods including Where, Select, OrderBy is parsed.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "System.Linq.Dynamic.Core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.0.7.10"
      }, {
        "fixed" : "1.3.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-32571"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/zzzprojects/System.Linq.Dynamic.Core"
  }, {
    "type" : "WEB",
    "url" : "https://research.nccgroup.com/2023/06/13/dynamic-linq-injection-remote-code-execution-vulnerability-cve-2023-32571"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-697" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-06-23T21:38:13Z",
    "nvd_published_at" : "2023-06-22T20:15:09Z"
  }
}