CVE-2021-42655: SSCMS SQL Injection Vulnerability

HIGH
Advisory Identifier: GHSA-5xr5-v2h7-2w7w
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CVSS 8.8
CWE-89
Published
Advisory Summary

CVE-2021-42655 is a HIGH (CVSS 8.8) sql injection vulnerability (CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')) affecting SSCMS libraries in the NuGet ecosystem. The issue involves sql injection in siteserver cms. Remediation is available in the latest vendor maintenance releases.

CVE-2021-42655 at a Glance

CVE Identifier CVE-2021-42655
GHSA Identifier GHSA-5xr5-v2h7-2w7w
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Affected Product SSCMS
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 8.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
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-2021-42655

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: Latest secure release 
Upgrade SSCMS to Latest secure release
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-2021-42655, 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 the patched release), 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-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection'), where the product constructs all or part of an sql command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended sql command when it is sent to a downstream component. without sufficient removal or quoting of sql syntax in user-controllable inputs, the generated sql query can cause those inputs to be interpreted as sql instead of ordinary user data. 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

SiteServer CMS V6.15.51 is affected by a SQL injection vulnerability.

CVE-2021-42655 Affected SSCMS Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
SSCMS
nuget/SSCMS
NuGet
≤ 6.15.51

References

NVD — CVE-2021-42655 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-42655
SSCMS Source Repository REPOSITORY
https://github.com/siteserver/cms/issues/3237
SSCMS Source Repository REPOSITORY
https://github.com/siteserver/cms

Frequently Asked Questions

What is CVE-2021-42655?
CVE-2021-42655 is a security vulnerability in SSCMS involving SQL injection in SiteServer CMS under CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection').
Which SSCMS versions are affected?
Affected versions include releases prior to current release patches across affected packages: SSCMS.
What version fixes CVE-2021-42655?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is SSCMS affected?
Yes, SSCMS is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2021-42655?
CVE-2021-42655 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2021-42655?
CVE-2021-42655 is classified under CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') (The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.).
How can I check NuGet dependencies for CVE-2021-42655?
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-5xr5-v2h7-2w7w",
  "modified" : "2022-06-03T15:49:29Z",
  "published" : "2022-05-25T00:00:37Z",
  "aliases" : [ "CVE-2021-42655" ],
  "summary" : "SQL injection in SiteServer CMS",
  "details" : "SiteServer CMS V6.15.51 is affected by a SQL injection vulnerability.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "SSCMS"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "6.15.51"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-42655"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/siteserver/cms/issues/3237"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/siteserver/cms"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-89" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-06-03T15:49:29Z",
    "nvd_published_at" : "2022-05-24T13:15:00Z"
  }
}