gsd-2016-2097
Vulnerability from gsd
Modified
2016-02-29 00:00
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 the 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!
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2016-2097",
"description": "Directory traversal vulnerability in Action View in Ruby on Rails before 3.2.22.2 and 4.x before 4.1.14.2 allows remote attackers to read arbitrary files by leveraging an application\u0027s unrestricted use of the render method and providing a .. (dot dot) in a pathname. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-0752.",
"id": "GSD-2016-2097",
"references": [
"https://www.suse.com/security/cve/CVE-2016-2097.html",
"https://www.debian.org/security/2016/dsa-3509",
"https://access.redhat.com/errata/RHSA-2016:0456",
"https://access.redhat.com/errata/RHSA-2016:0455",
"https://access.redhat.com/errata/RHSA-2016:0454"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"affected": [
{
"package": {
"ecosystem": "RubyGems",
"name": "actionpack",
"purl": "pkg:gem/actionpack"
}
}
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"aliases": [
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"details": "\nThere is a possible directory traversal and information leak vulnerability\nin Action View. This was meant to be fixed on CVE-2016-0752. However the 3.2\npatch was not covering all the scenarios. This vulnerability has been\nassigned 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\ncontroller 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\nunexpected places like outside the application\u0027s view directory, and can\npossibly escalate this to a remote code execution attack.\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-----------\nA workaround to this issue is to not pass arbitrary user input to the `render`\nmethod. 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\nfor 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\nand working with us in the patch!\n",
"id": "GSD-2016-2097",
"modified": "2016-02-29T00:00:00.000Z",
"published": "2016-02-29T00:00:00.000Z",
"references": [
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"url": "https://groups.google.com/forum/#!topic/rubyonrails-security/ddY6HgqB2z4"
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"github.com/rubysec/ruby-advisory-db": {
"cve": "2016-2097",
"cvss_v3": 5.3,
"date": "2016-02-29",
"description": "\nThere is a possible directory traversal and information leak vulnerability\nin Action View. This was meant to be fixed on CVE-2016-0752. However the 3.2\npatch was not covering all the scenarios. This vulnerability has been\nassigned 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\ncontroller 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\nunexpected places like outside the application\u0027s view directory, and can\npossibly escalate this to a remote code execution attack.\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-----------\nA workaround to this issue is to not pass arbitrary user input to the `render`\nmethod. 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\nfor 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\nand working with us in the patch!\n",
"framework": "rails",
"gem": "actionview",
"ghsa": "vx9j-46rh-fqr8",
"notes": "\u0027~\u003e 3.2.22.2\u0027 is found in gems/actionpack/CVE-2016-2097.yml",
"patched_versions": [
"~\u003e 4.1.14, \u003e= 4.1.14.2"
],
"title": "Possible Information Leak Vulnerability in Action View",
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],
"url": "https://groups.google.com/forum/#!topic/rubyonrails-security/ddY6HgqB2z4"
},
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"advisories": [
{
"affected_range": "\u003e=3.2.0.0.alpha \u003c3.2.22.2",
"affected_versions": "All versions starting from 3.2.0.0.alpha before 3.2.22.2",
"credit": "Jyoti Singh and Tobias Kraze from makandra",
"cvss_v2": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
"cvss_v3": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"cwe_ids": [
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"CWE-22",
"CWE-937"
],
"date": "2019-08-08",
"description": "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: `def index; render params[:id]; end`. Carefully 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.",
"fixed_versions": [
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],
"identifier": "CVE-2016-2097",
"identifiers": [
"CVE-2016-2097"
],
"package_slug": "gem/actionpack",
"pubdate": "2016-04-07",
"solution": "Upgrade to latest or use workaround; see provided link.",
"title": "Possible Information Leak Vulnerability in ActionView",
"urls": [
"https://groups.google.com/forum/#!topic/ruby-security-ann/ddY6HgqB2z4"
],
"uuid": "de0b20fb-e97a-4532-b34e-a9e9907a9d41"
},
{
"affected_range": "\u003e=4.0.0.0.alpha \u003c4.1.14.2",
"affected_versions": "All versions starting from 4.0.0.0.alpha before 4.1.14.2",
"credit": "Jyoti Singh and Tobias Kraze from makandra",
"cvss_v2": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
"cvss_v3": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"cwe_ids": [
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"CWE-22",
"CWE-937"
],
"date": "2019-08-08",
"description": "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: ``` def index; render params[:id]; end ``` Carefully 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.",
"fixed_versions": [
"4.1.14.2"
],
"identifier": "CVE-2016-2097",
"identifiers": [
"CVE-2016-2097"
],
"not_impacted": "4.2.x and later",
"package_slug": "gem/actionview",
"pubdate": "2016-04-07",
"solution": "Upgrade to latest or use workaround; see provided link.",
"title": "Possible Information Leak Vulnerability",
"urls": [
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],
"uuid": "4739f95a-116a-4c50-9fec-6d1602a647e5"
},
{
"affected_range": "\u003c3.2.22.2||\u003e=4.0.0.0 \u003c4.1.14.2",
"affected_versions": "All versions before 3.2.22.2, all versions starting from 4.0.0.0 before 4.1.14.2",
"cvss_v2": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
"cvss_v3": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"cwe_ids": [
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],
"date": "2019-08-08",
"description": "Directory traversal vulnerability in Action View in Ruby on Rails before allows remote attackers to read arbitrary files by leveraging an application\u0027s unrestricted use of the render method and providing a `..` in a pathname.",
"fixed_versions": [
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],
"identifier": "CVE-2016-2097",
"identifiers": [
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],
"not_impacted": "All versions starting from 3.2.22.2 before 4.0.0.0, all versions starting from 4.1.14.2",
"package_slug": "gem/rails",
"pubdate": "2016-04-07",
"solution": "Upgrade to versions 3.2.22.2, 4.1.14.2 or above.",
"title": "Path Traversal",
"urls": [
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"http://weblog.rubyonrails.org/2016/2/29/Rails-4-2-5-2-4-1-14-2-3-2-22-2-have-been-released/"
],
"uuid": "f12f1f5a-dfd4-4f8e-9b73-c6fc46ccc735"
}
]
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{
"cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.0.4:rc1:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:a:rubyonrails:ruby_on_rails:4.1.14.1:*:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.0.1:rc1:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:a:rubyonrails:rails:4.0.1:-:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
}
],
"operator": "OR"
}
]
},
"cve": {
"CVE_data_meta": {
"ASSIGNER": "secalert@redhat.com",
"ID": "CVE-2016-2097"
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "en",
"value": "Directory traversal vulnerability in Action View in Ruby on Rails before 3.2.22.2 and 4.x before 4.1.14.2 allows remote attackers to read arbitrary files by leveraging an application\u0027s unrestricted use of the render method and providing a .. (dot dot) in a pathname. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-0752."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "en",
"value": "CWE-22"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "http://weblog.rubyonrails.org/2016/2/29/Rails-4-2-5-2-4-1-14-2-3-2-22-2-have-been-released/",
"refsource": "CONFIRM",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "http://weblog.rubyonrails.org/2016/2/29/Rails-4-2-5-2-4-1-14-2-3-2-22-2-have-been-released/"
},
{
"name": "1035122",
"refsource": "SECTRACK",
"tags": [],
"url": "http://www.securitytracker.com/id/1035122"
},
{
"name": "[ruby-security-ann] 20160229 [CVE-2016-0752] Possible Information Leak Vulnerability in Action View",
"refsource": "MLIST",
"tags": [],
"url": "https://groups.google.com/forum/message/raw?msg=rubyonrails-security/ddY6HgqB2z4/we0RasMZIAAJ"
},
{
"name": "DSA-3509",
"refsource": "DEBIAN",
"tags": [],
"url": "http://www.debian.org/security/2016/dsa-3509"
},
{
"name": "83726",
"refsource": "BID",
"tags": [],
"url": "http://www.securityfocus.com/bid/83726"
},
{
"name": "openSUSE-SU-2016:0835",
"refsource": "SUSE",
"tags": [],
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00080.html"
},
{
"name": "SUSE-SU-2016:0854",
"refsource": "SUSE",
"tags": [],
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00083.html"
},
{
"name": "SUSE-SU-2016:0967",
"refsource": "SUSE",
"tags": [],
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00006.html"
}
]
}
},
"impact": {
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"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 5.0,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"severity": "MEDIUM"
},
"baseMetricV3": {
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"version": "3.0"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4
}
},
"lastModifiedDate": "2019-08-08T15:43Z",
"publishedDate": "2016-04-07T23:59Z"
}
}
}
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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.