CVE-2020-11066 Improperly Controlled Modification of Dynamically-Determined Object Attributes in TYPO3 CMS
Attackers can exploit insecure deserialization to delete arbitrary directories or send emails via the web server identity in TYPO3 CMS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-11066?
CVE-2020-11066 is a high-severity unsafe deserialization vulnerability in Typo3 Typo3, published on 13 May 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In TYPO3 CMS greater than or equal to 9.0.0 and less than 9.5.17 and greater than or equal to 10.0.0 and less than 10.4.2, calling unserialize() on malicious user-submitted content can lead to modification of dynamically-determined object attributes and result in triggering deletion of an arbitrary directory in the file system, if it is writable for the web server. It can also trigger message submission via email using the identity of the web site (mail relay). Another insecure deserialization vulnerability is required to actually exploit mentioned aspects. This has been fixed in 9.5.17 and 10.4.2.
Which versions are affected by CVE-2020-11066?
9 open source packages ship an affected version, including typo3/cms, typo3 and typo3/cms-core. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
typo3/cms Packagist | From 10.0.0 | 10.4.2 |
typo3/cms Packagist | From 10.0.0 | 10.4.2 |
typo3/cms Packagist | From 9.0.0 | 9.5.17 |
typo3/cms Packagist | From 9.0.0 | 9.5.17 |
typo3 Bitnami | From 9.0.0 | 9.5.17, 10.4.2 |
typo3/cms-core Packagist | From 10.0.0 | 10.4.2 |
3 more packages
typo3/cms-core Packagist | From 10.0.0 | 10.4.2 |
typo3/cms-core Packagist | From 9.0.0 | 9.5.17 |
typo3/cms-core Packagist | From 9.0.0 | 9.5.17 |
Products include Typo3 Typo3.
How do I fix CVE-2020-11066?
Upgrade typo3/cms to a fixed version for your release line: 10.4.2 or 9.5.17.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2020-11066 being exploited?
There is no known exploitation of CVE-2020-11066 in the wild and no public exploit code.
Other vulnerabilities in Typo3 Typo3
- CVE-2009-0258 Indexed Search Engine for TYPO3 Command Execution via Metacharacter Injection
- CVE-2011-3583 Typo3 SQL injection due to faulty prepared statements
- CVE-2011-4628 Typo3 Authentication Bypass
- CVE-2023-24814 Persisted Cross-Site Scripting in Frontend Rendering in typo3
- CVE-2021-41113 Cross-Site-Request-Forgery in Backend URI Handling in Typo3
Sources
Also known as BIT-typo3-2020-11066, GHSA-2rxh-h6h9-qrqc.