CVE-2019-16764 (GCVE-0-2019-16764)
Vulnerability from cvelistv5 – Published: 2019-11-25 17:11 – Updated: 2024-08-05 01:24
VLAI?
Title
PowAssent is susceptible to denial of service attacks
Summary
The use of `String.to_atom/1` in PowAssent is susceptible to denial of service attacks. In `PowAssent.Phoenix.AuthorizationController` a value is fetched from the user provided params, and `String.to_atom/1` is used to convert the binary value to an atom so it can be used to fetch the provider configuration value. This is unsafe as it is user provided data, and can be used to fill up the whole atom table of ~1M which will cause the app to crash.
Severity ?
6.5 (Medium)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| pow-auth | pow_assent |
Affected:
< 0.4.4 , < 0.4.4
(custom)
|
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-05T01:24:47.215Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
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"references": [
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"tags": [
"x_refsource_CONFIRM",
"x_transferred"
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"url": "https://github.com/pow-auth/pow_assent/security/advisories/GHSA-368c-xvrv-x986"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://hex.pm/packages/pow_assent"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "http://erlang.org/doc/efficiency_guide/commoncaveats.html#list_to_atom-1"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://github.com/pow-auth/pow_assent/commit/026105eeecc0e3c2f807e7109e745ea93c0fd9cf"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "pow_assent",
"vendor": "pow-auth",
"versions": [
{
"lessThan": "0.4.4",
"status": "affected",
"version": "\u003c 0.4.4",
"versionType": "custom"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "The use of `String.to_atom/1` in PowAssent is susceptible to denial of service attacks. In `PowAssent.Phoenix.AuthorizationController` a value is fetched from the user provided params, and `String.to_atom/1` is used to convert the binary value to an atom so it can be used to fetch the provider configuration value. This is unsafe as it is user provided data, and can be used to fill up the whole atom table of ~1M which will cause the app to crash."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400 Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
}
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},
"references": [
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],
"url": "https://github.com/pow-auth/pow_assent/security/advisories/GHSA-368c-xvrv-x986"
},
{
"tags": [
"x_refsource_MISC"
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"url": "https://hex.pm/packages/pow_assent"
},
{
"tags": [
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],
"url": "http://erlang.org/doc/efficiency_guide/commoncaveats.html#list_to_atom-1"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/pow-auth/pow_assent/commit/026105eeecc0e3c2f807e7109e745ea93c0fd9cf"
}
],
"source": {
"advisory": "GHSA-368c-xvrv-x986",
"discovery": "UNKNOWN"
},
"title": "PowAssent is susceptible to denial of service attacks",
"workarounds": [
{
"lang": "en",
"value": "A plug can be used to validate conn.params[\u0026quot;provider\u0026quot;] before it reaches the PowAssent.Phoenix.AuthorizationController."
}
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"affects": {
"vendor": {
"vendor_data": [
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"product": {
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{
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"version": {
"version_data": [
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"version_affected": "\u003c",
"version_name": "\u003c 0.4.4",
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"vendor_name": "pow-auth"
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"description": {
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"value": "The use of `String.to_atom/1` in PowAssent is susceptible to denial of service attacks. In `PowAssent.Phoenix.AuthorizationController` a value is fetched from the user provided params, and `String.to_atom/1` is used to convert the binary value to an atom so it can be used to fetch the provider configuration value. This is unsafe as it is user provided data, and can be used to fill up the whole atom table of ~1M which will cause the app to crash."
}
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},
"impact": {
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"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
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"integrityImpact": "NONE",
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"scope": "UNCHANGED",
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"refsource": "CONFIRM",
"url": "https://github.com/pow-auth/pow_assent/security/advisories/GHSA-368c-xvrv-x986"
},
{
"name": "https://hex.pm/packages/pow_assent",
"refsource": "MISC",
"url": "https://hex.pm/packages/pow_assent"
},
{
"name": "http://erlang.org/doc/efficiency_guide/commoncaveats.html#list_to_atom-1",
"refsource": "MISC",
"url": "http://erlang.org/doc/efficiency_guide/commoncaveats.html#list_to_atom-1"
},
{
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"url": "https://github.com/pow-auth/pow_assent/commit/026105eeecc0e3c2f807e7109e745ea93c0fd9cf"
}
]
},
"source": {
"advisory": "GHSA-368c-xvrv-x986",
"discovery": "UNKNOWN"
},
"work_around": [
{
"lang": "en",
"value": "A plug can be used to validate conn.params[\u0026quot;provider\u0026quot;] before it reaches the PowAssent.Phoenix.AuthorizationController."
}
]
}
}
},
"cveMetadata": {
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"cveId": "CVE-2019-16764",
"datePublished": "2019-11-25T17:11:19.000Z",
"dateReserved": "2019-09-24T00:00:00.000Z",
"dateUpdated": "2024-08-05T01:24:47.215Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
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Sightings
| Author | Source | Type | Date |
|---|
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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