gsd-2020-5267
Vulnerability from gsd
Modified
2020-03-19 00:00
Details
There is a possible XSS vulnerability in ActionView's JavaScript literal
escape helpers. Views that use the `j` or `escape_javascript` methods
may be susceptible to XSS attacks.
Versions Affected: All.
Not affected: None.
Fixed Versions: 6.0.2.2, 5.2.4.2
Impact
------
There is a possible XSS vulnerability in the `j` and `escape_javascript`
methods in ActionView. These methods are used for escaping JavaScript string
literals. Impacted code will look something like this:
```erb
<script>let a = `<%= j unknown_input %>`</script>
```
or
```erb
<script>let a = `<%= escape_javascript unknown_input %>`</script>
```
Releases
--------
The 6.0.2.2 and 5.2.4.2 releases are available at the normal locations.
Workarounds
-----------
For those that can't upgrade, the following monkey patch may be used:
```ruby
ActionView::Helpers::JavaScriptHelper::JS_ESCAPE_MAP.merge!(
{
"`" => "\\`",
"$" => "\\$"
}
)
module ActionView::Helpers::JavaScriptHelper
alias :old_ej :escape_javascript
alias :old_j :j
def escape_javascript(javascript)
javascript = javascript.to_s
if javascript.empty?
result = ""
else
result = javascript.gsub(/(\\|<\/|\r\n|\342\200\250|\342\200\251|[\n\r"']|[`]|[$])/u, JS_ESCAPE_MAP)
end
javascript.html_safe? ? result.html_safe : result
end
alias :j :escape_javascript
end
```
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2020-5267",
"description": "In ActionView before versions 6.0.2.2 and 5.2.4.2, there is a possible XSS vulnerability in ActionView\u0027s JavaScript literal escape helpers. Views that use the `j` or `escape_javascript` methods may be susceptible to XSS attacks. The issue is fixed in versions 6.0.2.2 and 5.2.4.2.",
"id": "GSD-2020-5267",
"references": [
"https://www.suse.com/security/cve/CVE-2020-5267.html",
"https://access.redhat.com/errata/RHSA-2020:4366"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"affected": [
{
"package": {
"ecosystem": "RubyGems",
"name": "actionview",
"purl": "pkg:gem/actionview"
}
}
],
"aliases": [
"CVE-2020-5267",
"GHSA-65cv-r6x7-79hv"
],
"details": "There is a possible XSS vulnerability in ActionView\u0027s JavaScript literal\nescape helpers. Views that use the `j` or `escape_javascript` methods\nmay be susceptible to XSS attacks.\n\nVersions Affected: All.\nNot affected: None.\nFixed Versions: 6.0.2.2, 5.2.4.2\n\nImpact\n------\nThere is a possible XSS vulnerability in the `j` and `escape_javascript`\nmethods in ActionView. These methods are used for escaping JavaScript string\nliterals. Impacted code will look something like this:\n\n```erb\n\u003cscript\u003elet a = `\u003c%= j unknown_input %\u003e`\u003c/script\u003e\n```\n\nor\n\n```erb\n\u003cscript\u003elet a = `\u003c%= escape_javascript unknown_input %\u003e`\u003c/script\u003e\n```\n\nReleases\n--------\nThe 6.0.2.2 and 5.2.4.2 releases are available at the normal locations.\n\nWorkarounds\n-----------\nFor those that can\u0027t upgrade, the following monkey patch may be used:\n\n```ruby\nActionView::Helpers::JavaScriptHelper::JS_ESCAPE_MAP.merge!(\n {\n \"`\" =\u003e \"\\\\`\",\n \"$\" =\u003e \"\\\\$\"\n }\n)\n\nmodule ActionView::Helpers::JavaScriptHelper\n alias :old_ej :escape_javascript\n alias :old_j :j\n\n def escape_javascript(javascript)\n javascript = javascript.to_s\n if javascript.empty?\n result = \"\"\n else\n result = javascript.gsub(/(\\\\|\u003c\\/|\\r\\n|\\342\\200\\250|\\342\\200\\251|[\\n\\r\"\u0027]|[`]|[$])/u, JS_ESCAPE_MAP)\n end\n javascript.html_safe? ? result.html_safe : result\n end\n\n alias :j :escape_javascript\nend\n```\n",
"id": "GSD-2020-5267",
"modified": "2020-03-19T00:00:00.000Z",
"published": "2020-03-19T00:00:00.000Z",
"references": [
{
"type": "WEB",
"url": "https://groups.google.com/forum/#!topic/rubyonrails-security/55reWMM_Pg8"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": 4.0,
"type": "CVSS_V3"
}
],
"summary": "Possible XSS vulnerability in ActionView"
}
},
"namespaces": {
"cve.org": {
"CVE_data_meta": {
"ASSIGNER": "security-advisories@github.com",
"ID": "CVE-2020-5267",
"STATE": "PUBLIC",
"TITLE": "Possible XSS vulnerability in ActionView"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "actionview",
"version": {
"version_data": [
{
"version_value": "\u003c 5.2.4.2"
},
{
"version_value": "\u003e= 6.0.0, \u003c 6.0.2.2"
}
]
}
}
]
},
"vendor_name": "rails"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "In ActionView before versions 6.0.2.2 and 5.2.4.2, there is a possible XSS vulnerability in ActionView\u0027s JavaScript literal escape helpers. Views that use the `j` or `escape_javascript` methods may be susceptible to XSS attacks. The issue is fixed in versions 6.0.2.2 and 5.2.4.2."
}
]
},
"impact": {
"cvss": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "HIGH",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://github.com/rails/rails/security/advisories/GHSA-65cv-r6x7-79hv",
"refsource": "CONFIRM",
"url": "https://github.com/rails/rails/security/advisories/GHSA-65cv-r6x7-79hv"
},
{
"name": "https://github.com/rails/rails/commit/033a738817abd6e446e1b320cb7d1a5c15224e9a",
"refsource": "MISC",
"url": "https://github.com/rails/rails/commit/033a738817abd6e446e1b320cb7d1a5c15224e9a"
},
{
"name": "[oss-security] 20200319 [CVE-2020-5267] Possible XSS vulnerability in ActionView",
"refsource": "MLIST",
"url": "http://www.openwall.com/lists/oss-security/2020/03/19/1"
},
{
"name": "[debian-lts-announce] 20200320 [SECURITY] [DLA 2149-1] rails security update",
"refsource": "MLIST",
"url": "https://lists.debian.org/debian-lts-announce/2020/03/msg00022.html"
},
{
"name": "openSUSE-SU-2020:0627",
"refsource": "SUSE",
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00019.html"
},
{
"name": "FEDORA-2020-4dd34860a3",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XJ7NUWXAEVRQCROIIBV4C6WXO6IR3KSB/"
}
]
},
"source": {
"advisory": "GHSA-65cv-r6x7-79hv",
"discovery": "UNKNOWN"
}
},
"github.com/rubysec/ruby-advisory-db": {
"cve": "2020-5267",
"cvss_v3": 4.0,
"date": "2020-03-19",
"description": "There is a possible XSS vulnerability in ActionView\u0027s JavaScript literal\nescape helpers. Views that use the `j` or `escape_javascript` methods\nmay be susceptible to XSS attacks.\n\nVersions Affected: All.\nNot affected: None.\nFixed Versions: 6.0.2.2, 5.2.4.2\n\nImpact\n------\nThere is a possible XSS vulnerability in the `j` and `escape_javascript`\nmethods in ActionView. These methods are used for escaping JavaScript string\nliterals. Impacted code will look something like this:\n\n```erb\n\u003cscript\u003elet a = `\u003c%= j unknown_input %\u003e`\u003c/script\u003e\n```\n\nor\n\n```erb\n\u003cscript\u003elet a = `\u003c%= escape_javascript unknown_input %\u003e`\u003c/script\u003e\n```\n\nReleases\n--------\nThe 6.0.2.2 and 5.2.4.2 releases are available at the normal locations.\n\nWorkarounds\n-----------\nFor those that can\u0027t upgrade, the following monkey patch may be used:\n\n```ruby\nActionView::Helpers::JavaScriptHelper::JS_ESCAPE_MAP.merge!(\n {\n \"`\" =\u003e \"\\\\`\",\n \"$\" =\u003e \"\\\\$\"\n }\n)\n\nmodule ActionView::Helpers::JavaScriptHelper\n alias :old_ej :escape_javascript\n alias :old_j :j\n\n def escape_javascript(javascript)\n javascript = javascript.to_s\n if javascript.empty?\n result = \"\"\n else\n result = javascript.gsub(/(\\\\|\u003c\\/|\\r\\n|\\342\\200\\250|\\342\\200\\251|[\\n\\r\"\u0027]|[`]|[$])/u, JS_ESCAPE_MAP)\n end\n javascript.html_safe? ? result.html_safe : result\n end\n\n alias :j :escape_javascript\nend\n```\n",
"framework": "rails",
"gem": "actionview",
"ghsa": "65cv-r6x7-79hv",
"patched_versions": [
"~\u003e 5.2.4, \u003e= 5.2.4.2",
"\u003e= 6.0.2.2"
],
"title": "Possible XSS vulnerability in ActionView",
"url": "https://groups.google.com/forum/#!topic/rubyonrails-security/55reWMM_Pg8"
},
"gitlab.com": {
"advisories": [
{
"affected_range": "\u003c5.2.4.2||\u003e=6.0.0 \u003c6.0.2.2",
"affected_versions": "All versions before 5.2.4.2, all versions starting from 6.0.0 before 6.0.2.2",
"cvss_v2": "AV:N/AC:M/Au:S/C:N/I:P/A:N",
"cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
"cwe_ids": [
"CWE-1035",
"CWE-80",
"CWE-937"
],
"date": "2020-10-05",
"description": "In ActionView there is a possible XSS vulnerability in ActionView\u0027s JavaScript literal escape helpers. Views that use the `j` or `escape_javascript` methods may be susceptible to XSS.",
"fixed_versions": [
"5.2.4.2",
"6.0.2.2"
],
"identifier": "CVE-2020-5267",
"identifiers": [
"CVE-2020-5267",
"GHSA-65cv-r6x7-79hv"
],
"not_impacted": "All versions starting from 5.2.4.2 before 6.0.0, all versions starting from 6.0.2.2",
"package_slug": "gem/actionview",
"pubdate": "2020-03-19",
"solution": "Upgrade to versions 5.2.4.2, 6.0.2.2 or above.",
"title": "Cross-site Scripting",
"urls": [
"https://nvd.nist.gov/vuln/detail/CVE-2020-5267"
],
"uuid": "0ff1a480-923e-4f1f-9d82-906af1809081"
}
]
},
"nvd.nist.gov": {
"configurations": {
"CVE_data_version": "4.0",
"nodes": [
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:a:rubyonrails:actionview:*:*:*:*:*:*:*:*",
"cpe_name": [],
"versionEndExcluding": "6.0.2.2",
"versionStartIncluding": "6.0.0",
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:a:rubyonrails:actionview:*:*:*:*:*:*:*:*",
"cpe_name": [],
"versionEndExcluding": "5.2.4.2",
"vulnerable": true
}
],
"operator": "OR"
},
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
}
],
"operator": "OR"
},
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
}
],
"operator": "OR"
}
]
},
"cve": {
"CVE_data_meta": {
"ASSIGNER": "security-advisories@github.com",
"ID": "CVE-2020-5267"
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "en",
"value": "In ActionView before versions 6.0.2.2 and 5.2.4.2, there is a possible XSS vulnerability in ActionView\u0027s JavaScript literal escape helpers. Views that use the `j` or `escape_javascript` methods may be susceptible to XSS attacks. The issue is fixed in versions 6.0.2.2 and 5.2.4.2."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "en",
"value": "CWE-80"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://github.com/rails/rails/commit/033a738817abd6e446e1b320cb7d1a5c15224e9a",
"refsource": "MISC",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/rails/rails/commit/033a738817abd6e446e1b320cb7d1a5c15224e9a"
},
{
"name": "https://github.com/rails/rails/security/advisories/GHSA-65cv-r6x7-79hv",
"refsource": "CONFIRM",
"tags": [
"Exploit",
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/rails/rails/security/advisories/GHSA-65cv-r6x7-79hv"
},
{
"name": "[oss-security] 20200319 [CVE-2020-5267] Possible XSS vulnerability in ActionView",
"refsource": "MLIST",
"tags": [
"Exploit",
"Mailing List",
"Patch",
"Third Party Advisory"
],
"url": "http://www.openwall.com/lists/oss-security/2020/03/19/1"
},
{
"name": "[debian-lts-announce] 20200320 [SECURITY] [DLA 2149-1] rails security update",
"refsource": "MLIST",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "https://lists.debian.org/debian-lts-announce/2020/03/msg00022.html"
},
{
"name": "openSUSE-SU-2020:0627",
"refsource": "SUSE",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00019.html"
},
{
"name": "FEDORA-2020-4dd34860a3",
"refsource": "FEDORA",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XJ7NUWXAEVRQCROIIBV4C6WXO6IR3KSB/"
}
]
}
},
"impact": {
"baseMetricV2": {
"acInsufInfo": false,
"cvssV2": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "SINGLE",
"availabilityImpact": "NONE",
"baseScore": 3.5,
"confidentialityImpact": "NONE",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N",
"version": "2.0"
},
"exploitabilityScore": 6.8,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"severity": "LOW",
"userInteractionRequired": true
},
"baseMetricV3": {
"cvssV3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "HIGH",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 1.7,
"impactScore": 2.7
}
},
"lastModifiedDate": "2023-02-03T16:39Z",
"publishedDate": "2020-03-19T18:15Z"
}
}
}
Loading…
Loading…
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.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- 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.
Loading…
Loading…