CVE-2019-11401: Sscms Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-ff4w-8chr-w2x9
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CVSS 7.2
CWE-434
Published
Advisory Summary

CVE-2019-11401 is a HIGH (CVSS 7.2) remote code execution vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting Sscms libraries in the NuGet ecosystem. The issue involves siteserver cms rce via unsafe file upload. Remediation is available by upgrading affected packages to version 6.12.

CVE-2019-11401 at a Glance

CVE Identifier CVE-2019-11401
GHSA Identifier GHSA-ff4w-8chr-w2x9
Severity HIGH
CVSS v3.1 Base Score 7.2
CWE Classification CWE-434: Unrestricted Upload of File with Dangerous Type
Affected Product Sscms
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 7.2

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required High (PR:H)
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-2019-11401

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

sscms fixed: 6.12 
Upgrade sscms to 6.12
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 sscms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2019-11401, inspect your project dependencies for Sscms:

inspect dependencies for sscms

Analyze the terminal output to locate any version of Sscms in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 6.12), 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-434: Unrestricted Upload of File with Dangerous Type, where the product allows the upload or transfer of dangerous file types that are automatically processed within its environment. In Sscms, 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

A issue was discovered in SiteServer CMS prior to version 6.12. It allows remote attackers to execute arbitrary code because an administrator can add the permitted file extension `.aassp`, which is converted to `.asp` because the "as" substring is deleted.

CVE-2019-11401 Affected Sscms Versions

1 component(s)
Fixed Versions:
6.12
Product / Package Ecosystem Affected Versions Fixed Version
sscms
nuget/sscms
NuGet
< 6.12
6.12

References

NVD — CVE-2019-11401 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-11401
Sscms Source Repository REPOSITORY
https://github.com/siteserver/cms/issues/1858
Security Fix Commit FIX COMMIT
https://github.com/siteserver/cms/commit/a7edb9ce3f9b52be3d18fa8a0e44931264e22436#diff-c8a06aaffb97eb2f4c587c1786906edd49dea574d063f74a59d9653ee0d5718b
Sscms Source Repository REPOSITORY
https://github.com/siteserver/cms

Frequently Asked Questions

What is CVE-2019-11401?
CVE-2019-11401 is a security vulnerability in Sscms involving SiteServer CMS RCE via unsafe file upload under CWE-434: Unrestricted Upload of File with Dangerous Type.
Which Sscms versions are affected?
Affected versions include releases prior to 6.12 across affected packages: sscms.
What version fixes CVE-2019-11401?
Upgrading to 6.12 (or the latest patched release for your respective branch) resolves the vulnerability.
Is sscms affected?
Yes, sscms is affected in releases prior to 6.12. Upgrade your dependency to 6.12 or later.
What is the CVSS score of CVE-2019-11401?
CVE-2019-11401 has a CVSS v3.1 base score of 7.2 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2019-11401?
CVE-2019-11401 is classified under CWE-434: Unrestricted Upload of File with Dangerous Type (The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.).
How can I check NuGet dependencies for CVE-2019-11401?
Run the dependency tree command: 'inspect dependencies for sscms'. 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-ff4w-8chr-w2x9",
  "modified" : "2023-08-25T21:15:54Z",
  "published" : "2022-05-24T16:44:03Z",
  "aliases" : [ "CVE-2019-11401" ],
  "summary" : "SiteServer CMS RCE via unsafe file upload",
  "details" : "A issue was discovered in SiteServer CMS prior to version 6.12. It allows remote attackers to execute arbitrary code because an administrator can add the permitted file extension `.aassp`, which is converted to `.asp` because the \"as\" substring is deleted.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "sscms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "6.12"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-11401"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/siteserver/cms/issues/1858"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/siteserver/cms/commit/a7edb9ce3f9b52be3d18fa8a0e44931264e22436#diff-c8a06aaffb97eb2f4c587c1786906edd49dea574d063f74a59d9653ee0d5718b"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/siteserver/cms"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-434" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-14T20:14:41Z",
    "nvd_published_at" : "2019-04-22T11:29:00Z"
  }
}