CVE-2020-5274: Symfony/error handler Exceptions Displayed Vulnerability
MODERATECVE-2020-5274 is a MODERATE (CVSS 4.6) exceptions displayed vulnerability (CWE-209: Generation of Error Message Containing Sensitive Information) affecting Symfony/error handler libraries in the Packagist ecosystem. The issue involves exceptions displayed in non-debug configurations in symfony. Remediation is available by upgrading affected packages to version 4.4.4, 5.0.4.
CVE-2020-5274 at a Glance
Security Impact
CVSS: 4.6
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N).
How to Fix CVE-2020-5274
To remediate this vulnerability, upgrade all affected Symfony/error handler dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade symfony/error-handler to 4.4.4Upgrade symfony/error-handler to 5.0.4Upgrade symfony/symfony to 4.4.4Upgrade symfony/symfony to 5.0.4Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for symfony/error-handlerHow to Check if You Are Affected
To determine whether your application is affected by CVE-2020-5274, inspect your project dependencies for Symfony/error handler:
inspect dependencies for symfony/error-handlerAnalyze the terminal output to locate any version of Symfony/error handler in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.4.4), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-209: Generation of Error Message Containing Sensitive Information, where the product generates an error message that includes sensitive information about its environment, users, or associated data. In Symfony/error handler, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2020-5274 Affected Symfony/error handler Versions
4 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
symfony/error-handler
|
Packagist |
≥ 4.4.0
< 4.4.4
|
4.4.4
|
|
symfony/error-handler
|
Packagist |
≥ 5.0.0
< 5.0.4
|
5.0.4
|
|
symfony/symfony
|
Packagist |
≥ 4.4.0
< 4.4.4
|
4.4.4
|
|
symfony/symfony
|
Packagist |
≥ 5.0.0
< 5.0.4
|
5.0.4
|
References
Frequently Asked Questions
What is CVE-2020-5274?
Which Symfony/error handler versions are affected?
What version fixes CVE-2020-5274?
Is symfony/error-handler affected?
Is symfony/symfony affected?
What is the CVSS score of CVE-2020-5274?
What CWE is associated with CVE-2020-5274?
How can I check Packagist dependencies for CVE-2020-5274?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-m884-279h-32v2",
"modified" : "2024-02-06T13:30:38Z",
"published" : "2020-03-30T20:09:31Z",
"aliases" : [ "CVE-2020-5274" ],
"summary" : "Exceptions displayed in non-debug configurations in Symfony",
"details" : "Description\n-----------\n\nWhen `ErrorHandler` renders an exception HTML page, it uses un-escaped properties from the related Exception class to render the stacktrace. The security issue comes from the fact that the stacktraces were also displayed in non-`debug` environments.\n\nResolution\n----------\n\nThe `ErrorHandler` class now escapes all properties coming from the related Exception, and the stacktrace is not displayed anymore in non-`debug` environments.\n\nThe patches for this issue are available [here](https://github.com/symfony/symfony/commit/cf80224589ac05402d4f72f5ddf80900ec94d5ad) and [here](https://github.com/symfony/symfony/commit/629d21b800a15dc649fb0ae9ed7cd9211e7e45db) for branch 4.4.\n\nCredits\n-------\n\nI would like to thank Luka Sikic for reporting & Yonel Ceruto and Jérémy Derussé for fixing the issue.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Packagist",
"name" : "symfony/error-handler"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "4.4.0"
}, {
"fixed" : "4.4.4"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "symfony/error-handler"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "5.0.0"
}, {
"fixed" : "5.0.4"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "symfony/symfony"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "4.4.0"
}, {
"fixed" : "4.4.4"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "symfony/symfony"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "5.0.0"
}, {
"fixed" : "5.0.4"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/symfony/symfony/security/advisories/GHSA-m884-279h-32v2"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-5274"
}, {
"type" : "WEB",
"url" : "https://github.com/symfony/symfony/commit/629d21b800a15dc649fb0ae9ed7cd9211e7e45db"
}, {
"type" : "WEB",
"url" : "https://github.com/symfony/symfony/commit/cf80224589ac05402d4f72f5ddf80900ec94d5ad"
}, {
"type" : "WEB",
"url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/error-handler/CVE-2020-5274.yaml"
}, {
"type" : "WEB",
"url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2020-5274.yaml"
}, {
"type" : "WEB",
"url" : "https://symfony.com/cve-2020-5274"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-209" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2020-03-30T19:36:11Z",
"nvd_published_at" : null
}
}