Vulnerabilities in pkg:gem/smashing

PACKAGE
Advisory Identifier: GHSA-254j-mmc5-qhpx
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Advisory Summary

CVE-2021-35440 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Smashing libraries in the RubyGems ecosystem. The issue involves smashing cross-site scripting vulnerability. Remediation is available by upgrading affected packages to version 1.3.5.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:gem/smashing

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:gem/smashing. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-254j-mmc5-qhpx CVE-2021-35440 MODERATE Smashing Cross-site Scripting vulnerability

CVE-2021-35440 at a Glance

CVE Identifier CVE-2021-35440
GHSA Identifier GHSA-254j-mmc5-qhpx
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Smashing
Package Ecosystem RubyGems
Published Date
Last Updated

Security Impact

CVSS: 6.1

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:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2021-35440

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

smashing fixed: 1.3.5 
Upgrade smashing to 1.3.5
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 smashing

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-35440, inspect your project dependencies for Smashing:

inspect dependencies for smashing

Analyze the terminal output to locate any version of Smashing in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.3.5), 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-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Smashing, 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

Smashing 1.3.4 is vulnerable to Cross Site Scripting (XSS). A URL for a widget can be crafted and used to execute JavaScript on the victim's computer. The JavaScript code can then steal data available in the session/cookies depending on the user environment (e.g. if re-using internal URL's for deploying, or cookies that are very permissive) private information may be retrieved by the attacker.

CVE-2021-35440 Affected Smashing Versions

1 component(s)
Fixed Versions:
1.3.5
Product / Package Ecosystem Affected Versions Fixed Version
smashing
gem/smashing
RubyGems
< 1.3.5
1.3.5

References

NVD — CVE-2021-35440 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-35440
Smashing Source Repository REPOSITORY
https://github.com/Smashing/smashing/pull/186
Smashing Source Repository REPOSITORY
https://github.com/Smashing/smashing/pull/186/commits/f4648137ae77aa2a9ccd14b2e6eeaed2cfb32da3
Smashing Source Repository REPOSITORY
https://github.com/Smashing/smashing
Smashing Source Repository REPOSITORY
https://github.com/Smashing/smashing/blob/ad7325f159f89854ca4e7d94e7be9bee507b6d46/CHANGELOG.md
Smashing Source Repository REPOSITORY
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/smashing/CVE-2021-35440.yml

Frequently Asked Questions

What is CVE-2021-35440?
CVE-2021-35440 is a security vulnerability in Smashing involving Smashing Cross-site Scripting vulnerability under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Smashing versions are affected?
Affected versions include releases prior to 1.3.5 across affected packages: smashing.
What version fixes CVE-2021-35440?
Upgrading to 1.3.5 (or the latest patched release for your respective branch) resolves the vulnerability.
Is smashing affected?
Yes, smashing is affected in releases prior to 1.3.5. Upgrade your dependency to 1.3.5 or later.
What is the CVSS score of CVE-2021-35440?
CVE-2021-35440 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2021-35440?
CVE-2021-35440 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check RubyGems dependencies for CVE-2021-35440?
Run the dependency tree command: 'inspect dependencies for smashing'. 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-254j-mmc5-qhpx",
  "modified" : "2023-01-27T00:53:50Z",
  "published" : "2022-05-24T19:06:56Z",
  "aliases" : [ "CVE-2021-35440" ],
  "summary" : "Smashing Cross-site Scripting vulnerability",
  "details" : "Smashing 1.3.4 is vulnerable to Cross Site Scripting (XSS). A URL for a widget can be crafted and used to execute JavaScript on the victim's computer. The JavaScript code can then steal data available in the session/cookies depending on the user environment (e.g. if re-using internal URL's for deploying, or cookies that are very permissive) private information may be retrieved by the attacker.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "smashing"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.3.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-35440"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Smashing/smashing/pull/186"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Smashing/smashing/pull/186/commits/f4648137ae77aa2a9ccd14b2e6eeaed2cfb32da3"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Smashing/smashing"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Smashing/smashing/blob/ad7325f159f89854ca4e7d94e7be9bee507b6d46/CHANGELOG.md"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/smashing/CVE-2021-35440.yml"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-01-27T00:53:50Z",
    "nvd_published_at" : "2021-07-06T15:15:00Z"
  }
}