CVE-2013-2512: Ftpd OS Command Injection Vulnerability

CRITICAL
Advisory Identifier: GHSA-7vxr-6cxg-j3x8
Share
CVSS 9.8
CWE-78
Published
Advisory Summary

CVE-2013-2512 is a CRITICAL (CVSS 9.8) os command injection vulnerability (CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')) affecting Ftpd libraries in the RubyGems ecosystem. The issue involves os command injection in ftpd. Remediation is available by upgrading affected packages to version 0.2.2.

CVE-2013-2512 at a Glance

CVE Identifier CVE-2013-2512
GHSA Identifier GHSA-7vxr-6cxg-j3x8
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Product Ftpd
Package Ecosystem RubyGems
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-2013-2512

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

ftpd fixed: 0.2.2 
Upgrade ftpd to 0.2.2
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 ftpd

How to Check if You Are Affected

To determine whether your application is affected by CVE-2013-2512, inspect your project dependencies for Ftpd:

inspect dependencies for ftpd

Analyze the terminal output to locate any version of Ftpd in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.2.2), 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-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'), where the product constructs all or part of an os command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended os command when it is sent to a downstream component. In Ftpd, 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

The ftpd gem 0.2.1 for Ruby allows remote attackers to execute arbitrary OS commands via shell metacharacters in a LIST or NLST command argument within FTP protocol traffic.

CVE-2013-2512 Affected Ftpd Versions

1 component(s)
Fixed Versions:
0.2.2
Product / Package Ecosystem Affected Versions Fixed Version
ftpd
gem/ftpd
RubyGems
< 0.2.2
0.2.2

References

NVD — CVE-2013-2512 NVD
https://nvd.nist.gov/vuln/detail/CVE-2013-2512
Security Fix Commit FIX COMMIT
https://github.com/wconrad/ftpd/commit/828064f1a0ab69b2642c59cab8292a67bb44182c
Ftpd Source Repository REPOSITORY
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/ftpd/CVE-2013-2512.yml
Ftpd Source Repository REPOSITORY
https://github.com/wconrad/ftpd
web.archive.org/web/20210206231123/... WEB
https://web.archive.org/web/20210206231123/http://vapidlabs.com/advisory.php?v=34

Frequently Asked Questions

What is CVE-2013-2512?
CVE-2013-2512 is a security vulnerability in Ftpd involving OS Command Injection in ftpd under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection').
Which Ftpd versions are affected?
Affected versions include releases prior to 0.2.2 across affected packages: ftpd.
What version fixes CVE-2013-2512?
Upgrading to 0.2.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ftpd affected?
Yes, ftpd is affected in releases prior to 0.2.2. Upgrade your dependency to 0.2.2 or later.
What is the CVSS score of CVE-2013-2512?
CVE-2013-2512 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-2013-2512?
CVE-2013-2512 is classified under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') (The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.).
How can I check RubyGems dependencies for CVE-2013-2512?
Run the dependency tree command: 'inspect dependencies for ftpd'. 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-7vxr-6cxg-j3x8",
  "modified" : "2021-10-07T18:59:04Z",
  "published" : "2021-10-12T22:33:59Z",
  "aliases" : [ "CVE-2013-2512" ],
  "summary" : "OS Command Injection in ftpd",
  "details" : "The ftpd gem 0.2.1 for Ruby allows remote attackers to execute arbitrary OS commands via shell metacharacters in a LIST or NLST command argument within FTP protocol traffic.",
  "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" : "RubyGems",
      "name" : "ftpd"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.2.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2013-2512"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/wconrad/ftpd/commit/828064f1a0ab69b2642c59cab8292a67bb44182c"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/ftpd/CVE-2013-2512.yml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/wconrad/ftpd"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20210206231123/http://vapidlabs.com/advisory.php?v=34"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-78" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-10-07T18:59:04Z",
    "nvd_published_at" : "2021-01-26T23:15:00Z"
  }
}