CVE-2017-0900: Rubygems update RubyGems Improper Input Validation Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-p7f2-rr42-m9xm
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CVSS 7.5
CWE-20
Published
Advisory Summary

CVE-2017-0900 is a HIGH (CVSS 7.5) rubygems improper input validation vulnerability vulnerability (CWE-20: Improper Input Validation) affecting Rubygems update libraries in the RubyGems ecosystem. The issue involves rubygems improper input validation vulnerability. Remediation is available by upgrading affected packages to version 2.6.13.

CVE-2017-0900 at a Glance

CVE Identifier CVE-2017-0900
GHSA Identifier GHSA-p7f2-rr42-m9xm
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-20: Improper Input Validation
Affected Product Rubygems update
Package Ecosystem RubyGems
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2017-0900

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

rubygems-update fixed: 2.6.13 
Upgrade rubygems-update to 2.6.13
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 rubygems-update

How to Check if You Are Affected

To determine whether your application is affected by CVE-2017-0900, inspect your project dependencies for Rubygems update:

inspect dependencies for rubygems-update

Analyze the terminal output to locate any version of Rubygems update in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.6.13), 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-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Rubygems update, 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

RubyGems versions 2.6.12 and earlier are vulnerable to maliciously crafted gem specifications that cause a denial of service attack against RubyGems clients who have issued a `query` command.

CVE-2017-0900 Affected Rubygems update Versions

1 component(s)
Fixed Versions:
2.6.13
Product / Package Ecosystem Affected Versions Fixed Version
rubygems-update
gem/rubygems-update
RubyGems
< 2.6.13
2.6.13

References

NVD — CVE-2017-0900 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-0900
Security Fix Commit FIX COMMIT
https://github.com/rubygems/rubygems/commit/8a38a4fc24c6591e6c8f43d1fadab6efeb4d6251
hackerone.com/reports/243003 WEB
https://hackerone.com/reports/243003
access.redhat.com/errata/rhsa-2017:34... WEB
https://access.redhat.com/errata/RHSA-2017:3485
access.redhat.com/errata/rhsa-2018:03... WEB
https://access.redhat.com/errata/RHSA-2018:0378
Rubygems update Source Repository REPOSITORY
https://github.com/rubygems/rubygems
access.redhat.com/errata/rhsa-2018:05... WEB
https://access.redhat.com/errata/RHSA-2018:0583
access.redhat.com/errata/rhsa-2018:05... WEB
https://access.redhat.com/errata/RHSA-2018:0585
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
Rubygems update Security Information SECURITY
https://security.gentoo.org/glsa/201710-01
Rubygems update Security Information SECURITY
https://web.archive.org/web/20190212090616/http://www.securitytracker.com/id/1039249
Rubygems update Security Information SECURITY
https://web.archive.org/web/20200227143907/http://www.securityfocus.com/bid/100579
Rubygems update Security Information SECURITY
https://www.debian.org/security/2017/dsa-3966
blog.rubygems.org/2017/08/27/2.6.13-r... WEB
http://blog.rubygems.org/2017/08/27/2.6.13-released.html

Frequently Asked Questions

What is CVE-2017-0900?
CVE-2017-0900 is a security vulnerability in Rubygems update involving RubyGems Improper Input Validation vulnerability under CWE-20: Improper Input Validation.
Which Rubygems update versions are affected?
Affected versions include releases prior to 2.6.13 across affected packages: rubygems-update.
What version fixes CVE-2017-0900?
Upgrading to 2.6.13 (or the latest patched release for your respective branch) resolves the vulnerability.
Is rubygems-update affected?
Yes, rubygems-update is affected in releases prior to 2.6.13. Upgrade your dependency to 2.6.13 or later.
What is the CVSS score of CVE-2017-0900?
CVE-2017-0900 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2017-0900?
CVE-2017-0900 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check RubyGems dependencies for CVE-2017-0900?
Run the dependency tree command: 'inspect dependencies for rubygems-update'. 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-p7f2-rr42-m9xm",
  "modified" : "2023-03-10T02:39:32Z",
  "published" : "2022-05-14T01:04:09Z",
  "aliases" : [ "CVE-2017-0900" ],
  "summary" : "RubyGems Improper Input Validation vulnerability",
  "details" : "RubyGems versions 2.6.12 and earlier are vulnerable to maliciously crafted gem specifications that cause a denial of service attack against RubyGems clients who have issued a `query` command.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "rubygems-update"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.6.13"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-0900"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rubygems/rubygems/commit/8a38a4fc24c6591e6c8f43d1fadab6efeb4d6251"
  }, {
    "type" : "WEB",
    "url" : "https://hackerone.com/reports/243003"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2017:3485"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2018:0378"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2018:0583"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2018:0585"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/rubygems/rubygems"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html"
  }, {
    "type" : "WEB",
    "url" : "https://security.gentoo.org/glsa/201710-01"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20190212090616/http://www.securitytracker.com/id/1039249"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20200227143907/http://www.securityfocus.com/bid/100579"
  }, {
    "type" : "WEB",
    "url" : "https://www.debian.org/security/2017/dsa-3966"
  }, {
    "type" : "WEB",
    "url" : "http://blog.rubygems.org/2017/08/27/2.6.13-released.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-03-10T02:39:32Z",
    "nvd_published_at" : "2017-08-31T20:29:00Z"
  }
}