CVE-2020-11066: Typo3/cms core Class Destructors Causing Side-effects When Vulnerability
HIGHCVE-2020-11066 is a HIGH (CVSS 8.7) class destructors causing side-effects when vulnerability (CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')) affecting Typo3/cms core libraries in the Packagist ecosystem. The issue involves class destructors causing side-effects when being unserialized in typo3 cms. Remediation is available by upgrading affected packages to version 9.5.17, 10.4.2.
CVE-2020-11066 at a Glance
Security Impact
CVSS: 8.7
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:H).
How to Fix CVE-2020-11066
To remediate this vulnerability, upgrade all affected Typo3/cms core 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 typo3/cms-core to 9.5.17Upgrade typo3/cms-core to 10.4.2Upgrade typo3/cms to 10.4.2Upgrade typo3/cms to 9.5.17Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for typo3/cms-coreHow to Check if You Are Affected
To determine whether your application is affected by CVE-2020-11066, inspect your project dependencies for Typo3/cms core:
inspect dependencies for typo3/cms-coreAnalyze the terminal output to locate any version of Typo3/cms core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 9.5.17), 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-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution'), where the product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype. In Typo3/cms core, 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-2020-11066 Affected Typo3/cms core Versions
4 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
typo3/cms-core
|
Packagist |
≥ 9.0.0
< 9.5.17
|
9.5.17
|
|
typo3/cms-core
|
Packagist |
≥ 10.0.0
< 10.4.2
|
10.4.2
|
|
typo3/cms
|
Packagist |
≥ 10.0.0
< 10.4.2
|
10.4.2
|
|
typo3/cms
|
Packagist |
≥ 9.0.0
< 9.5.17
|
9.5.17
|
References
Frequently Asked Questions
What is CVE-2020-11066?
Which Typo3/cms core versions are affected?
What version fixes CVE-2020-11066?
Is typo3/cms-core affected?
Is typo3/cms affected?
What is the CVSS score of CVE-2020-11066?
What CWE is associated with CVE-2020-11066?
How can I check Packagist dependencies for CVE-2020-11066?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-2rxh-h6h9-qrqc",
"modified" : "2021-01-08T20:16:34Z",
"published" : "2020-05-13T23:18:38Z",
"aliases" : [ "CVE-2020-11066" ],
"summary" : "Class destructors causing side-effects when being unserialized in TYPO3 CMS",
"details" : "Calling unserialize() on malicious user-submitted content can result in the following scenarios:\n- trigger deletion of arbitrary directory in file system (if writable for web server)\n- trigger message submission via email using identity of web site (mail relay)\n\nAnother insecure deserialization vulnerability is required to actually exploit mentioned aspects.\n\nUpdate to TYPO3 versions 9.5.17 or 10.4.2 that fix the problem described.\n\n### References\n* https://typo3.org/security/advisory/typo3-core-sa-2020-004",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Packagist",
"name" : "typo3/cms-core"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "9.0.0"
}, {
"fixed" : "9.5.17"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "typo3/cms-core"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "10.0.0"
}, {
"fixed" : "10.4.2"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "typo3/cms"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "10.0.0"
}, {
"fixed" : "10.4.2"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "typo3/cms"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "9.0.0"
}, {
"fixed" : "9.5.17"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-2rxh-h6h9-qrqc"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-11066"
}, {
"type" : "WEB",
"url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-11066.yaml"
}, {
"type" : "WEB",
"url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-11066.yaml"
}, {
"type" : "WEB",
"url" : "https://typo3.org/security/advisory/typo3-core-sa-2020-004"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-1321", "CWE-915" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2020-05-13T23:17:19Z",
"nvd_published_at" : "2020-05-14T00:15:00Z"
}
}