CVE-2017-0903: Rubygems update RubyGems Vulnerable To Deserialization Of Vulnerability

Q: What is CVE-2017-0903?

CVE-2017-0903 is a security vulnerability in Rubygems update involving RubyGems vulnerable to Deserialization of Untrusted Data under CWE-502: Deserialization of Untrusted Data.

Q: Which Rubygems update versions are affected?

Affected versions include releases prior to 2.6.14 across affected packages: rubygems-update.

Q: What version fixes CVE-2017-0903?

Upgrading to 2.6.14 (or the latest patched release for your respective branch) resolves the vulnerability.

Q: Is rubygems-update affected?

Yes, rubygems-update is affected in releases prior to 2.6.14. Upgrade your dependency to 2.6.14 or later.

Q: What is the CVSS score of CVE-2017-0903?

CVE-2017-0903 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Q: What CWE is associated with CVE-2017-0903?

CVE-2017-0903 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).

Q: How can I check RubyGems dependencies for CVE-2017-0903?

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.

CRITICAL

Advisory Identifier: GHSA-mqwr-4qf2-2hcv

CVSS 9.8

CWE-502

Published 2022-05-13

Advisory Summary

CVE-2017-0903 is a CRITICAL (CVSS 9.8) rubygems vulnerable to deserialization of vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Rubygems update libraries in the RubyGems ecosystem. The issue involves rubygems vulnerable to deserialization of untrusted data. Remediation is available by upgrading affected packages to version 2.6.14.

CVE-2017-0903 at a Glance

CVE Identifier CVE-2017-0903

GHSA Identifier GHSA-mqwr-4qf2-2hcv

Severity CRITICAL

CVSS v3.1 Base Score 9.8

CWE Classification CWE-502: Deserialization of Untrusted Data

Affected Product Rubygems update

Package Ecosystem RubyGems

Published Date 2022-05-13

Last Updated 2023-03-09

Security Impact

CVSS: 9.8

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: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-2017-0903

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: 2.6.14

Upgrade rubygems-update to 2.6.14

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-2017-0903, 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 2.6.14), 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-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. 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 between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability. YAML deserialization of gem specifications can bypass class white lists. Specially crafted serialized objects can possibly be used to escalate to remote code execution. The issue has been patched in 2.6.14.

CVE-2017-0903 Affected Rubygems update Versions

1 component(s)

Fixed Versions:

2.6.14

Product / Package	Ecosystem	Affected Versions	Fixed Version
rubygems-update gem/rubygems-update	RubyGems	≥ 2.0.0 < 2.6.14	2.6.14

References

NVD — CVE-2017-0903 NVD

https://nvd.nist.gov/vuln/detail/CVE-2017-0903

Security Fix Commit FIX COMMIT

https://github.com/rubygems/rubygems/commit/510b1638ac9bba3ceb7a5d73135dafff9e5bab49

hackerone.com/reports/274990 WEB

https://hackerone.com/reports/274990

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

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

Rubygems update Source Repository REPOSITORY

https://github.com/rubygems/rubygems

lists.debian.org/debian-lts-announce... WEB

https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html

usn.ubuntu.com/3553-1 WEB

https://usn.ubuntu.com/3553-1

usn.ubuntu.com/3685-1 WEB

https://usn.ubuntu.com/3685-1

Rubygems update Security Information SECURITY

https://web.archive.org/web/20200227143351/http://www.securityfocus.com/bid/101275

Rubygems update Security Information SECURITY

https://www.debian.org/security/2017/dsa-4031

blog.rubygems.org/2017/10/09/2.6.14-r... WEB

http://blog.rubygems.org/2017/10/09/2.6.14-released.html

blog.rubygems.org/2017/10/09/unsafe-o... WEB

http://blog.rubygems.org/2017/10/09/unsafe-object-deserialization-vulnerability.html

Frequently Asked Questions

What is CVE-2017-0903?

CVE-2017-0903 is a security vulnerability in Rubygems update involving RubyGems vulnerable to Deserialization of Untrusted Data under CWE-502: Deserialization of Untrusted Data.

Which Rubygems update versions are affected?

Affected versions include releases prior to 2.6.14 across affected packages: rubygems-update.

What version fixes CVE-2017-0903?

Upgrading to 2.6.14 (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 2.6.14. Upgrade your dependency to 2.6.14 or later.

What is the CVSS score of CVE-2017-0903?

CVE-2017-0903 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

What CWE is associated with CVE-2017-0903?

CVE-2017-0903 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).

How can I check RubyGems dependencies for CVE-2017-0903?

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-mqwr-4qf2-2hcv",
  "modified" : "2023-03-09T00:39:36Z",
  "published" : "2022-05-13T01:38:26Z",
  "aliases" : [ "CVE-2017-0903" ],
  "summary" : "RubyGems vulnerable to Deserialization of Untrusted Data",
  "details" : "RubyGems versions between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability. YAML deserialization of gem specifications can bypass class white lists. Specially crafted serialized objects can possibly be used to escalate to remote code execution. The issue has been patched in 2.6.14.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "rubygems-update"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0"
      }, {
        "fixed" : "2.6.14"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-0903"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rubygems/rubygems/commit/510b1638ac9bba3ceb7a5d73135dafff9e5bab49"
  }, {
    "type" : "WEB",
    "url" : "https://hackerone.com/reports/274990"
  }, {
    "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://usn.ubuntu.com/3553-1"
  }, {
    "type" : "WEB",
    "url" : "https://usn.ubuntu.com/3685-1"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20200227143351/http://www.securityfocus.com/bid/101275"
  }, {
    "type" : "WEB",
    "url" : "https://www.debian.org/security/2017/dsa-4031"
  }, {
    "type" : "WEB",
    "url" : "http://blog.rubygems.org/2017/10/09/2.6.14-released.html"
  }, {
    "type" : "WEB",
    "url" : "http://blog.rubygems.org/2017/10/09/unsafe-object-deserialization-vulnerability.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-502" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-03-09T00:39:36Z",
    "nvd_published_at" : "2017-10-11T18:29:00Z"
  }
}

CVSS V3

9.8 CRITICAL