ghsa-vx9j-46rh-fqr8
Vulnerability from github
There is a possible directory traversal and information leak vulnerability in Action View. This was meant to be fixed on CVE-2016-0752. However the 3.2 patch was not covering all possible scenarios. This vulnerability has been assigned the CVE identifier CVE-2016-2097.
Versions Affected: 3.2.x, 4.0.x, 4.1.x Not affected: 4.2+ Fixed Versions: 3.2.22.2, 4.1.14.2
Impact
Applications that pass unverified user input to the render method in a controller may be vulnerable to an information leak vulnerability.
Impacted code will look something like this:
ruby
def index
render params[:id]
end
Carefully crafted requests can cause the above code to render files from unexpected places like outside the application's view directory, and can possibly escalate this to a remote code execution attack.
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
A workaround to this issue is to not pass arbitrary user input to the render method. Instead, verify that data before passing it to the render method.
For example, change this:
ruby
def index
render params[:id]
end
To this:
```ruby def index render verify_template(params[:id]) end
private def verify_template(name) # add verification logic particular to your application here end ```
Patches
To aid users who aren't able to upgrade immediately we have provided patches for it. It is in git-am format and consist of a single changeset.
- 3-2-render_data_leak_2.patch - Patch for 3.2 series
- 4-1-render_data_leak_2.patch - Patch for 4.1 series
Credits
Thanks to both Jyoti Singh and Tobias Kraze from makandra for reporting this and working with us in the patch!
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 3.2.22.1"
},
"package": {
"ecosystem": "RubyGems",
"name": "actionview"
},
"ranges": [
{
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.2.22.2"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.1.14.1"
},
"package": {
"ecosystem": "RubyGems",
"name": "actionview"
},
"ranges": [
{
"events": [
{
"introduced": "4.0.0"
},
{
"fixed": "4.1.14.2"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 3.2.22.1"
},
"package": {
"ecosystem": "RubyGems",
"name": "actionpack"
},
"ranges": [
{
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.2.22.2"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.1.14.1"
},
"package": {
"ecosystem": "RubyGems",
"name": "actionpack"
},
"ranges": [
{
"events": [
{
"introduced": "4.0.0"
},
{
"fixed": "4.1.14.2"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2016-2097"
],
"database_specific": {
"cwe_ids": [
"CWE-22"
],
"github_reviewed": true,
"github_reviewed_at": "2020-06-16T21:58:49Z",
"nvd_published_at": "2016-04-07T23:59:05Z",
"severity": "MODERATE"
},
"details": "There is a possible directory traversal and information leak vulnerability in Action View. This was meant to be fixed on CVE-2016-0752. However the 3.2 patch was not covering all possible scenarios. This vulnerability has been assigned the CVE identifier CVE-2016-2097.\n\nVersions Affected: 3.2.x, 4.0.x, 4.1.x\nNot affected: 4.2+\nFixed Versions: 3.2.22.2, 4.1.14.2\n\nImpact\n------\nApplications that pass unverified user input to the `render` method in a controller may be vulnerable to an information leak vulnerability.\n\nImpacted code will look something like this:\n\n```ruby\ndef index\n render params[:id]\nend\n```\n\nCarefully crafted requests can cause the above code to render files from unexpected places like outside the application\u0027s view directory, and can possibly escalate this to a remote code execution attack.\n\nAll users running an affected release should either upgrade or use one of the workarounds immediately.\n\nReleases\n--------\nThe FIXED releases are available at the normal locations.\n\nWorkarounds\n-----------\nA workaround to this issue is to not pass arbitrary user input to the `render` method. Instead, verify that data before passing it to the `render` method.\n\nFor example, change this:\n\n```ruby\ndef index\n render params[:id]\nend\n```\n\nTo this:\n\n```ruby\ndef index\n render verify_template(params[:id])\nend\n\nprivate\ndef verify_template(name)\n # add verification logic particular to your application here\nend\n```\n\nPatches\n-------\nTo aid users who aren\u0027t able to upgrade immediately we have provided patches for it. It is in git-am format and consist of a single changeset.\n\n* 3-2-render_data_leak_2.patch - Patch for 3.2 series\n* 4-1-render_data_leak_2.patch - Patch for 4.1 series\n\nCredits\n-------\nThanks to both Jyoti Singh and Tobias Kraze from makandra for reporting this and working with us in the patch!",
"id": "GHSA-vx9j-46rh-fqr8",
"modified": "2023-07-05T20:44:17Z",
"published": "2017-10-24T18:33:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2016-2097"
},
{
"type": "WEB",
"url": "https://github.com/rails/rails/commit/8a1d3ea617ffb0c8ae8467fa439bf63a3bfc4324"
},
{
"type": "PACKAGE",
"url": "https://github.com/rails/rails"
},
{
"type": "WEB",
"url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2016-2097.yml"
},
{
"type": "WEB",
"url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionview/CVE-2016-2097.yml"
},
{
"type": "WEB",
"url": "https://groups.google.com/forum/#!topic/rubyonrails-security/ddY6HgqB2z4"
},
{
"type": "WEB",
"url": "https://web.archive.org/web/20160322002234/http://www.securitytracker.com/id/1035122"
},
{
"type": "WEB",
"url": "https://web.archive.org/web/20200228015320/http://www.securityfocus.com/bid/83726"
},
{
"type": "WEB",
"url": "https://web.archive.org/web/20201221115217/https://groups.google.com/forum/message/raw?msg=rubyonrails-security/ddY6HgqB2z4/we0RasMZIAAJ"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00080.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00083.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00006.html"
},
{
"type": "WEB",
"url": "http://weblog.rubyonrails.org/2016/2/29/Rails-4-2-5-2-4-1-14-2-3-2-22-2-have-been-released"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2016/dsa-3509"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "actionview contains Path Traversal vulnerability"
}
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.