{
"id": "GHSA-mcx4-f5f5-4859",
"aliases": [
"CVE-2020-5255"
],
"details": "Description\n-----------\n\nWhen a `Response` does not contain a `Content-Type` header, Symfony falls back to the format defined in the `Accept` header of the request, leading to a possible mismatch between the response's content and `Content-Type` header. When the response is cached, this can lead to a corrupted cache where the cached format is not the right one.\n\nResolution\n----------\n\nSymfony does not use the `Accept` header anymore to guess the `Content-Type`.\n\nThe patch for this issue is available [here](https://github.com/symfony/symfony/commit/dca343442e6a954f96a2609e7b4e9c21ed6d74e6) for the 4.4 branch.\n\nCredits\n-------\n\nI would like to thank Xavier Lacot from JoliCode for reporting & Yonel Ceruto and Tobias Schultze for fixing the issue.",
"summary": "Prevent cache poisoning via a Response Content-Type header in Symfony",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.7"
}
]
}
],
"package": {
"name": "symfony/http-foundation",
"ecosystem": "Packagist"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.0.0"
},
{
"fixed": "5.0.7"
}
]
}
],
"package": {
"name": "symfony/http-foundation",
"ecosystem": "Packagist"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.7"
}
]
}
],
"package": {
"name": "symfony/symfony",
"ecosystem": "Packagist"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.0.0"
},
{
"fixed": "5.0.7"
}
]
}
],
"package": {
"name": "symfony/symfony",
"ecosystem": "Packagist"
}
}
],
"modified": "2021-01-08T20:25:26Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L"
}
],
"published": "2020-03-30T20:09:16Z",
"references": [
{
"url": "https://github.com/symfony/symfony/security/advisories/GHSA-mcx4-f5f5-4859",
"type": "WEB"
},
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-5255",
"type": "ADVISORY"
},
{
"url": "https://github.com/symfony/symfony/commit/dca343442e6a954f96a2609e7b4e9c21ed6d74e6",
"type": "WEB"
},
{
"url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation/CVE-2020-5255.yaml",
"type": "WEB"
},
{
"url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2020-5255.yaml",
"type": "WEB"
},
{
"url": "https://lists.fedoraproject.org/archives/list/[email protected] /message/C36JLPHUPKDFAX6D5WYFC4ALO2K7RDUQ",
"type": "WEB"
},
{
"url": "https://symfony.com/blog/cve-2020-5255-prevent-cache-poisoning-via-a-response-content-type-header",
"type": "WEB"
},
{
"url": "https://symfony.com/cve-2020-5255",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-435"
],
"severity": "LOW",
"github_reviewed": true,
"nvd_published_at": null,
"github_reviewed_at": "2020-03-30T19:28:58Z"
}
}