GSD-2020-15169
Vulnerability from gsd - Updated: 2020-09-09 00:00Details
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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"product_name": "actionview",
"version": {
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},
{
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"impact": {
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"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
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"github.com/rubysec/ruby-advisory-db": {
"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": [
"~\u003e 5.2.4, \u003e= 5.2.4.4",
"\u003e= 6.0.3.3"
],
"title": "Potential XSS vulnerability in Action View",
"url": "https://groups.google.com/g/rubyonrails-security/c/b-C9kSGXYrc"
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"gitlab.com": {
"advisories": [
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"affected_range": "\u003c5.2.4.4||\u003e=6.0.0.0 \u003c6.0.3.3",
"affected_versions": "All versions before 5.2.4.4, all versions starting from 6.0.0.0 before 6.0.3.3",
"cvss_v2": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
"cvss_v3": "CVSS:3.1/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": "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.",
"fixed_versions": [
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],
"identifier": "CVE-2020-15169",
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],
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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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}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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