gsd-2020-15169
Vulnerability from gsd
Modified
2020-09-09 00:00
Details
There is a potential Cross-Site Scripting (XSS) vulnerability in Action
View's translation helpers. Views that allow the user to control the
default (not found) value of the `t` and `translate` helpers could be
susceptible to XSS attacks.
Impact
------
When an HTML-unsafe string is passed as the default for a missing
translation key [named `html` or ending in `_html`](https://guides.rubyonrails.org/i18n.html#using-safe-html-translations),
the default string is incorrectly marked as HTML-safe and not escaped.
Vulnerable code may look like the following examples:
```erb
<%# The welcome_html translation is not defined for the current locale: %>
<%= t("welcome_html", default: untrusted_user_controlled_string) %>
<%# Neither the title.html translation nor the missing.html translation is defined for the current locale: %>
<%= t("title.html", default: [:"missing.html", untrusted_user_controlled_string]) %>
```
Workarounds
-----------
Impacted users who can’t upgrade to a patched Rails version can avoid
this issue by manually escaping default translations with the
`html_escape` helper (aliased as `h`):
```erb
<%= t("welcome_html", default: h(untrusted_user_controlled_string)) %>
```
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2020-15169",
"description": "In Action View before versions 5.2.4.4 and 6.0.3.3 there is a potential Cross-Site Scripting (XSS) vulnerability in Action View\u0027s translation helpers. Views that allow the user to control the default (not found) value of the `t` and `translate` helpers could be susceptible to XSS attacks. When an HTML-unsafe string is passed as the default for a missing translation key named html or ending in _html, the default string is incorrectly marked as HTML-safe and not escaped. This is patched in versions 6.0.3.3 and 5.2.4.4. A workaround without upgrading is proposed in the source advisory.",
"id": "GSD-2020-15169",
"references": [
"https://www.suse.com/security/cve/CVE-2020-15169.html",
"https://www.debian.org/security/2020/dsa-4766",
"https://access.redhat.com/errata/RHSA-2021:1313"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"affected": [
{
"package": {
"ecosystem": "RubyGems",
"name": "actionview",
"purl": "pkg:gem/actionview"
}
}
],
"aliases": [
"CVE-2020-15169",
"GHSA-cfjv-5498-mph5"
],
"details": "There is a potential Cross-Site Scripting (XSS) vulnerability in Action\nView\u0027s translation helpers. Views that allow the user to control the\ndefault (not found) value of the `t` and `translate` helpers could be\nsusceptible to XSS attacks.\n\nImpact\n------\n\nWhen an HTML-unsafe string is passed as the default for a missing\ntranslation key [named `html` or ending in `_html`](https://guides.rubyonrails.org/i18n.html#using-safe-html-translations),\nthe default string is incorrectly marked as HTML-safe and not escaped.\nVulnerable code may look like the following examples:\n\n```erb\n\u003c%# The welcome_html translation is not defined for the current locale: %\u003e\n\u003c%= t(\"welcome_html\", default: untrusted_user_controlled_string) %\u003e\n\n\u003c%# Neither the title.html translation nor the missing.html translation is defined for the current locale: %\u003e\n\u003c%= t(\"title.html\", default: [:\"missing.html\", untrusted_user_controlled_string]) %\u003e\n```\n\nWorkarounds\n-----------\nImpacted users who can\u2019t upgrade to a patched Rails version can avoid\nthis issue by manually escaping default translations with the\n`html_escape` helper (aliased as `h`):\n\n```erb\n\u003c%= t(\"welcome_html\", default: h(untrusted_user_controlled_string)) %\u003e\n```\n",
"id": "GSD-2020-15169",
"modified": "2020-09-09T00:00:00.000Z",
"published": "2020-09-09T00:00:00.000Z",
"references": [
{
"type": "WEB",
"url": "https://groups.google.com/g/rubyonrails-security/c/b-C9kSGXYrc"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": 5.4,
"type": "CVSS_V3"
}
],
"summary": "Potential XSS vulnerability in Action View"
}
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"cve": "2020-15169",
"cvss_v3": 5.4,
"date": "2020-09-09",
"description": "There is a potential Cross-Site Scripting (XSS) vulnerability in Action\nView\u0027s translation helpers. Views that allow the user to control the\ndefault (not found) value of the `t` and `translate` helpers could be\nsusceptible to XSS attacks.\n\nImpact\n------\n\nWhen an HTML-unsafe string is passed as the default for a missing\ntranslation key [named `html` or ending in `_html`](https://guides.rubyonrails.org/i18n.html#using-safe-html-translations),\nthe default string is incorrectly marked as HTML-safe and not escaped.\nVulnerable code may look like the following examples:\n\n```erb\n\u003c%# The welcome_html translation is not defined for the current locale: %\u003e\n\u003c%= t(\"welcome_html\", default: untrusted_user_controlled_string) %\u003e\n\n\u003c%# Neither the title.html translation nor the missing.html translation is defined for the current locale: %\u003e\n\u003c%= t(\"title.html\", default: [:\"missing.html\", untrusted_user_controlled_string]) %\u003e\n```\n\nWorkarounds\n-----------\nImpacted users who can\u2019t upgrade to a patched Rails version can avoid\nthis issue by manually escaping default translations with the\n`html_escape` helper (aliased as `h`):\n\n```erb\n\u003c%= t(\"welcome_html\", default: h(untrusted_user_controlled_string)) %\u003e\n```\n",
"framework": "rails",
"gem": "actionview",
"ghsa": "cfjv-5498-mph5",
"patched_versions": [
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"title": "Potential XSS vulnerability in Action View",
"url": "https://groups.google.com/g/rubyonrails-security/c/b-C9kSGXYrc"
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"cwe_ids": [
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"CWE-79",
"CWE-937"
],
"date": "2020-12-08",
"description": "In Action View there is a potential Cross-Site Scripting (XSS) vulnerability in Action View\u0027s translation helpers. Views that allow the user to control the default (not found) value of the `t` and `translate` helpers could be susceptible to XSS attacks. When an HTML-unsafe string is passed as the default for a missing translation key named html or ending in `_html`, the default string is incorrectly marked as HTML-safe and not escaped.",
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"package_slug": "gem/actionview",
"pubdate": "2020-09-11",
"solution": "Upgrade to versions 5.2.4.4, 6.0.3.3 or above.",
"title": "Cross-site Scripting",
"urls": [
"https://nvd.nist.gov/vuln/detail/CVE-2020-15169"
],
"uuid": "743b5195-4f16-40eb-8347-9faa07c0d4f1"
}
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"lastModifiedDate": "2020-12-08T18:58Z",
"publishedDate": "2020-09-11T16:15Z"
}
}
}
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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.
- 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.
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