CVE-2020-27998: FastReport.OpenSource Missing Authorization Vulnerability

CRITICAL
Advisory Identifier: GHSA-v726-3vg9-cp34
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CVSS 9.8
CWE-862
Published
Advisory Summary

CVE-2020-27998 is a CRITICAL (CVSS 9.8) missing authorization vulnerability (CWE-862: Missing Authorization) affecting FastReport.OpenSource libraries in the NuGet ecosystem. The issue involves missing authorization in fastreport. Remediation is available by upgrading affected packages to version 2020.4.0.

CVE-2020-27998 at a Glance

CVE Identifier CVE-2020-27998
GHSA Identifier GHSA-v726-3vg9-cp34
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-862: Missing Authorization
Affected Product FastReport.OpenSource
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-2020-27998

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

FastReport.OpenSource fixed: 2020.4.0 
Upgrade FastReport.OpenSource to 2020.4.0
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 FastReport.OpenSource

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-27998, inspect your project dependencies for FastReport.OpenSource:

inspect dependencies for FastReport.OpenSource

Analyze the terminal output to locate any version of FastReport.OpenSource in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2020.4.0), 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-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. In FastReport.OpenSource, 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

An issue was discovered in FastReport before 2020.4.0. It lacks a ScriptSecurity feature and therefore may mishandle (for example) GetType, typeof, TypeOf, DllImport, LoadLibrary, and GetProcAddress.

CVE-2020-27998 Affected FastReport.OpenSource Versions

1 component(s)
Fixed Versions:
2020.4.0
Product / Package Ecosystem Affected Versions Fixed Version
FastReport.OpenSource
nuget/FastReport.OpenSource
NuGet
< 2020.4.0
2020.4.0

References

NVD — CVE-2020-27998 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-27998
FastReport.OpenSource Source Repository REPOSITORY
https://github.com/FastReports/FastReport/pull/206
FastReport.OpenSource Source Repository REPOSITORY
https://github.com/FastReports/FastReport/compare/v2020.3.0...v2020.4.0
FastReport.OpenSource Security Information SECURITY
https://opensource.fast-report.com/2020/09/report-script-security.html
GitHub Advisory / Wiki ADVISORY
https://securitylab.github.com/advisories/GHSL-2020-143-FastReportsInc-FastReports

Frequently Asked Questions

What is CVE-2020-27998?
CVE-2020-27998 is a security vulnerability in FastReport.OpenSource involving Missing Authorization in FastReport under CWE-862: Missing Authorization.
Which FastReport.OpenSource versions are affected?
Affected versions include releases prior to 2020.4.0 across affected packages: FastReport.OpenSource.
What version fixes CVE-2020-27998?
Upgrading to 2020.4.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is FastReport.OpenSource affected?
Yes, FastReport.OpenSource is affected in releases prior to 2020.4.0. Upgrade your dependency to 2020.4.0 or later.
What is the CVSS score of CVE-2020-27998?
CVE-2020-27998 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-2020-27998?
CVE-2020-27998 is classified under CWE-862: Missing Authorization (The product does not perform an authorization check when an actor attempts to access a resource or perform an action.).
How can I check NuGet dependencies for CVE-2020-27998?
Run the dependency tree command: 'inspect dependencies for FastReport.OpenSource'. 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-v726-3vg9-cp34",
  "modified" : "2021-07-26T18:29:52Z",
  "published" : "2021-08-02T17:28:16Z",
  "aliases" : [ "CVE-2020-27998" ],
  "summary" : "Missing Authorization in FastReport",
  "details" : "An issue was discovered in FastReport before 2020.4.0. It lacks a ScriptSecurity feature and therefore may mishandle (for example) GetType, typeof, TypeOf, DllImport, LoadLibrary, and GetProcAddress.",
  "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" : "FastReport.OpenSource"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2020.4.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-27998"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FastReports/FastReport/pull/206"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FastReports/FastReport/compare/v2020.3.0...v2020.4.0"
  }, {
    "type" : "WEB",
    "url" : "https://opensource.fast-report.com/2020/09/report-script-security.html"
  }, {
    "type" : "ADVISORY",
    "url" : "https://securitylab.github.com/advisories/GHSL-2020-143-FastReportsInc-FastReports"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-07-26T18:29:52Z",
    "nvd_published_at" : "2020-10-29T18:15:00Z"
  }
}