gsd-2015-7579
Vulnerability from gsd
Modified
2016-01-25 00:00
Details
There is a XSS vulnerability in `Rails::Html::FullSanitizer` used by Action View's `strip_tags`. This vulnerability has been assigned the CVE identifier CVE-2015-7579. Versions Affected: 1.0.2 Not affected: 1.0.0, 1.0.1 Fixed Versions: 1.0.3 Impact ------ Due to the way that `Rails::Html::FullSanitizer` is implemented, if an attacker passes an already escaped HTML entity to the input of Action View's `strip_tags` these entities will be unescaped what may cause a XSS attack if used in combination with `raw` or `html_safe`. For example: strip_tags("&lt;script&gt;alert('XSS')&lt;/script&gt;") Would generate: <script>alert('XSS')</script> After the fix it will generate: &lt;script&gt;alert('XSS')&lt;/script&gt; All users running an affected release should either upgrade or use one of the workarounds immediately. Releases -------- The FIXED releases are available at the normal locations. Workarounds ----------- If you can't upgrade, please use the following monkey patch in an initializer that is loaded before your application: ``` $ cat config/initializers/strip_tags_fix.rb class ActionView::Base def strip_tags(html) self.class.full_sanitizer.sanitize(html) end end ``` Patches ------- To aid users who aren't able to upgrade immediately we have provided patches for the two supported release series. They are in git-am format and consist of a single changeset. * Do-not-unescape-already-escaped-HTML-entities.patch Credits ------- Thank you to Arthur Neves from GitHub and Spyros Livathinos from Zendesk for reporting the problem and working with us to fix it.
Aliases
Aliases
CVE-2015-7579


To clipboard 

{
  "GSD": {
    "alias": "CVE-2015-7579",
    "description": "Cross-site scripting (XSS) vulnerability in the rails-html-sanitizer gem 1.0.2 for Ruby on Rails 4.2.x and 5.x allows remote attackers to inject arbitrary web script or HTML via an HTML entity that is mishandled by the Rails::Html::FullSanitizer class.",
    "id": "GSD-2015-7579",
    "references": [
      "https://www.suse.com/security/cve/CVE-2015-7579.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "affected": [
        {
          "package": {
            "ecosystem": "RubyGems",
            "name": "rails-html-sanitizer",
            "purl": "pkg:gem/rails-html-sanitizer"
          }
        }
      ],
      "aliases": [
        "CVE-2015-7579",
        "GHSA-r9c2-cr39-c8g6"
      ],
      "details": "There is a XSS vulnerability in `Rails::Html::FullSanitizer` used by Action View\u0027s `strip_tags`.\nThis vulnerability has been assigned the CVE identifier CVE-2015-7579.\n\nVersions Affected:  1.0.2\nNot affected:       1.0.0, 1.0.1\nFixed Versions:     1.0.3\n\nImpact\n------\nDue to the way that `Rails::Html::FullSanitizer` is implemented, if an attacker\npasses an already escaped HTML entity to the input of Action View\u0027s `strip_tags`\nthese entities will be unescaped what may cause a XSS attack if used in combination\nwith `raw` or `html_safe`.\n\nFor example:\n\n    strip_tags(\"\u0026lt;script\u0026gt;alert(\u0027XSS\u0027)\u0026lt;/script\u0026gt;\")\n\nWould generate:\n\n    \u003cscript\u003ealert(\u0027XSS\u0027)\u003c/script\u003e\n\nAfter the fix it will generate:\n\n    \u0026lt;script\u0026gt;alert(\u0027XSS\u0027)\u0026lt;/script\u0026gt;\n\nAll users running an affected release should either upgrade or use one of the\nworkarounds immediately.\n\nReleases\n--------\nThe FIXED releases are available at the normal locations.\n\nWorkarounds\n-----------\nIf you can\u0027t upgrade, please use the following monkey patch in an initializer\nthat is loaded before your application:\n\n```\n$ cat config/initializers/strip_tags_fix.rb\nclass ActionView::Base\n  def strip_tags(html)\n    self.class.full_sanitizer.sanitize(html)\n  end\nend\n```\n\nPatches\n-------\nTo aid users who aren\u0027t able to upgrade immediately we have provided patches\nfor the two supported release series. They are in git-am format and consist\nof a single changeset.\n\n* Do-not-unescape-already-escaped-HTML-entities.patch\n\nCredits\n-------\nThank you to Arthur Neves from GitHub and Spyros Livathinos from Zendesk for\nreporting the problem and working with us to fix it.\n",
      "id": "GSD-2015-7579",
      "modified": "2016-01-25T00:00:00.000Z",
      "published": "2016-01-25T00:00:00.000Z",
      "references": [
        {
          "type": "WEB",
          "url": "https://groups.google.com/forum/#!topic/rubyonrails-security/OU9ugTZcbjc"
        }
      ],
      "schema_version": "1.4.0",
      "severity": [
        {
          "score": 6.1,
          "type": "CVSS_V3"
        }
      ],
      "summary": "XSS vulnerability in rails-html-sanitizer"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "secalert@redhat.com",
        "ID": "CVE-2015-7579",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "n/a",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "n/a"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "n/a"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "Cross-site scripting (XSS) vulnerability in the rails-html-sanitizer gem 1.0.2 for Ruby on Rails 4.2.x and 5.x allows remote attackers to inject arbitrary web script or HTML via an HTML entity that is mishandled by the Rails::Html::FullSanitizer class."
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/rails/rails-html-sanitizer/commit/49dfc1584c5b8e35a4ffabf8356ba3df025e8d3f",
            "refsource": "CONFIRM",
            "url": "https://github.com/rails/rails-html-sanitizer/commit/49dfc1584c5b8e35a4ffabf8356ba3df025e8d3f"
          },
          {
            "name": "[ruby-security-ann] 20160125 [CVE-2015-7579] XSS vulnerability in rails-html-sanitizer",
            "refsource": "MLIST",
            "url": "https://groups.google.com/forum/message/raw?msg=ruby-security-ann/OU9ugTZcbjc/uksRkSxZEgAJ"
          },
          {
            "name": "FEDORA-2016-3a2606f993",
            "refsource": "FEDORA",
            "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178046.html"
          },
          {
            "name": "SUSE-SU-2016:1146",
            "refsource": "SUSE",
            "url": "http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00053.html"
          },
          {
            "name": "1034816",
            "refsource": "SECTRACK",
            "url": "http://www.securitytracker.com/id/1034816"
          },
          {
            "name": "[oss-security] 20160125 [CVE-2015-7579] XSS vulnerability in rails-html-sanitizer",
            "refsource": "MLIST",
            "url": "http://www.openwall.com/lists/oss-security/2016/01/25/12"
          },
          {
            "name": "FEDORA-2016-59ce8b61dd",
            "refsource": "FEDORA",
            "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178064.html"
          },
          {
            "name": "SUSE-SU-2016:0391",
            "refsource": "SUSE",
            "url": "http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00024.html"
          },
          {
            "name": "openSUSE-SU-2016:0356",
            "refsource": "SUSE",
            "url": "http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00014.html"
          }
        ]
      }
    },
    "github.com/rubysec/ruby-advisory-db": {
      "cve": "2015-7579",
      "cvss_v3": 6.1,
      "date": "2016-01-25",
      "description": "There is a XSS vulnerability in `Rails::Html::FullSanitizer` used by Action View\u0027s `strip_tags`.\nThis vulnerability has been assigned the CVE identifier CVE-2015-7579.\n\nVersions Affected:  1.0.2\nNot affected:       1.0.0, 1.0.1\nFixed Versions:     1.0.3\n\nImpact\n------\nDue to the way that `Rails::Html::FullSanitizer` is implemented, if an attacker\npasses an already escaped HTML entity to the input of Action View\u0027s `strip_tags`\nthese entities will be unescaped what may cause a XSS attack if used in combination\nwith `raw` or `html_safe`.\n\nFor example:\n\n    strip_tags(\"\u0026lt;script\u0026gt;alert(\u0027XSS\u0027)\u0026lt;/script\u0026gt;\")\n\nWould generate:\n\n    \u003cscript\u003ealert(\u0027XSS\u0027)\u003c/script\u003e\n\nAfter the fix it will generate:\n\n    \u0026lt;script\u0026gt;alert(\u0027XSS\u0027)\u0026lt;/script\u0026gt;\n\nAll users running an affected release should either upgrade or use one of the\nworkarounds immediately.\n\nReleases\n--------\nThe FIXED releases are available at the normal locations.\n\nWorkarounds\n-----------\nIf you can\u0027t upgrade, please use the following monkey patch in an initializer\nthat is loaded before your application:\n\n```\n$ cat config/initializers/strip_tags_fix.rb\nclass ActionView::Base\n  def strip_tags(html)\n    self.class.full_sanitizer.sanitize(html)\n  end\nend\n```\n\nPatches\n-------\nTo aid users who aren\u0027t able to upgrade immediately we have provided patches\nfor the two supported release series. They are in git-am format and consist\nof a single changeset.\n\n* Do-not-unescape-already-escaped-HTML-entities.patch\n\nCredits\n-------\nThank you to Arthur Neves from GitHub and Spyros Livathinos from Zendesk for\nreporting the problem and working with us to fix it.\n",
      "gem": "rails-html-sanitizer",
      "ghsa": "r9c2-cr39-c8g6",
      "patched_versions": [
        "\u003e= 1.0.3"
      ],
      "title": "XSS vulnerability in rails-html-sanitizer",
      "unaffected_versions": [
        "~\u003e 1.0.0",
        "~\u003e 1.0.1"
      ],
      "url": "https://groups.google.com/forum/#!topic/rubyonrails-security/OU9ugTZcbjc"
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "1.0.2",
          "affected_versions": "Version 1.0.2",
          "credit": "Arthur Neves from GitHub and Spyros Livathinos from Zendesk",
          "cvss_v2": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "cvss_v3": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-79",
            "CWE-937"
          ],
          "date": "2019-08-08",
          "description": "Due to the way that `Rails::Html::FullSanitizer` is implemented, if an attacker passes an already escaped HTML entity to the input of Action View\u0027s `strip_tags` these entities will be unescaped what may cause a XSS attack if used in combination with `raw` or `html_safe`. ",
          "fixed_versions": [
            "1.0.3"
          ],
          "identifier": "CVE-2015-7579",
          "identifiers": [
            "CVE-2015-7579"
          ],
          "not_impacted": "1.0.0, 1.0.1",
          "package_slug": "gem/rails-html-sanitizer",
          "pubdate": "2016-02-15",
          "solution": "Upgrade to latest, apply patch or use workaround. See provided link.",
          "title": "XSS vulnerability in strip_tags",
          "urls": [
            "https://groups.google.com/forum/#!topic/rubyonrails-security/OU9ugTZcbjc"
          ],
          "uuid": "7cff9cf7-f7d3-4b5e-b741-884dee49e1b0"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [
              {
                "children": [],
                "cpe_match": [
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:html_sanitizer:*:*:*:*:*:ruby:*:*",
                    "cpe_name": [],
                    "versionEndIncluding": "1.0.2",
                    "vulnerable": true
                  }
                ],
                "operator": "OR"
              },
              {
                "children": [],
                "cpe_match": [
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:5.0.0:beta3:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:5.0.0:beta2:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.5:rc1:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.5:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.1:rc3:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.1:rc2:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.0:beta2:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.0:beta1:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:5.0.0:beta1.1:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:5.0.0:beta1:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.4:rc1:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.4:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.1:rc1:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.1:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.0:rc3:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.0:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.5.1:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.5:rc2:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.2:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.1:rc4:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.0:beta4:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.0:beta3:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.6:rc1:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.5.2:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.3:rc1:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.3:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.0:rc2:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.2.0:rc1:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  }
                ],
                "operator": "OR"
              }
            ],
            "cpe_match": [],
            "operator": "AND"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "secalert@redhat.com",
          "ID": "CVE-2015-7579"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "Cross-site scripting (XSS) vulnerability in the rails-html-sanitizer gem 1.0.2 for Ruby on Rails 4.2.x and 5.x allows remote attackers to inject arbitrary web script or HTML via an HTML entity that is mishandled by the Rails::Html::FullSanitizer class."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-79"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "[oss-security] 20160125 [CVE-2015-7579] XSS vulnerability in rails-html-sanitizer",
              "refsource": "MLIST",
              "tags": [],
              "url": "http://www.openwall.com/lists/oss-security/2016/01/25/12"
            },
            {
              "name": "[ruby-security-ann] 20160125 [CVE-2015-7579] XSS vulnerability in rails-html-sanitizer",
              "refsource": "MLIST",
              "tags": [],
              "url": "https://groups.google.com/forum/message/raw?msg=ruby-security-ann/OU9ugTZcbjc/uksRkSxZEgAJ"
            },
            {
              "name": "https://github.com/rails/rails-html-sanitizer/commit/49dfc1584c5b8e35a4ffabf8356ba3df025e8d3f",
              "refsource": "CONFIRM",
              "tags": [],
              "url": "https://github.com/rails/rails-html-sanitizer/commit/49dfc1584c5b8e35a4ffabf8356ba3df025e8d3f"
            },
            {
              "name": "SUSE-SU-2016:1146",
              "refsource": "SUSE",
              "tags": [],
              "url": "http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00053.html"
            },
            {
              "name": "FEDORA-2016-3a2606f993",
              "refsource": "FEDORA",
              "tags": [],
              "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178046.html"
            },
            {
              "name": "FEDORA-2016-59ce8b61dd",
              "refsource": "FEDORA",
              "tags": [],
              "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178064.html"
            },
            {
              "name": "openSUSE-SU-2016:0356",
              "refsource": "SUSE",
              "tags": [],
              "url": "http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00014.html"
            },
            {
              "name": "SUSE-SU-2016:0391",
              "refsource": "SUSE",
              "tags": [],
              "url": "http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00024.html"
            },
            {
              "name": "1034816",
              "refsource": "SECTRACK",
              "tags": [],
              "url": "http://www.securitytracker.com/id/1034816"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "confidentialityImpact": "NONE",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 8.6,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": true
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.0"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 2.7
        }
      },
      "lastModifiedDate": "2019-08-08T15:16Z",
      "publishedDate": "2016-02-16T02:59Z"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.