CVE-2020-15099 Exposure of Sensitive Information to an Unauthorized Actor in TYPO3 CMS
Attackers with valid HMAC keys can read sensitive configuration files, leading to database access and remote code execution 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-2020-15099?
CVE-2020-15099 is a high-severity vulnerability in Typo3 Typo3, published on 29 Jul 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 9.5.20, and greater than or equal to 10.0.0 and less than 10.4.6, in a case where an attacker manages to generate a valid cryptographic message authentication code (HMAC-SHA1) - either by using a different existing vulnerability or in case the internal encryptionKey was exposed - it is possible to retrieve arbitrary files of a TYPO3 installation. This includes the possibility to fetch typo3conf/LocalConfiguration.php, which again contains the encryptionKey as well as credentials of the database management system being used. In case a database server is directly accessible either via internet or in a shared hosting network, this allows the ability to completely retrieve, manipulate or delete database contents. This includes creating an administration user account - which can be used to trigger remote code execution by injecting custom extensions. This has been patched in versions 9.5.20 and 10.4.6.
Which versions are affected by CVE-2020-15099?
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 | 10.4.6 |
typo3/cms Packagist | From 10.0.0 | 10.4.6 |
typo3/cms Packagist | From 9.0.0 | 9.5.20 |
typo3/cms Packagist | From 9.0.0 | 9.5.20 |
typo3 Bitnami | From 9.0.0 | 9.5.20, 10.4.6 |
typo3/cms-core Packagist | From 10.0.0 | 10.4.6 |
3 more packages
typo3/cms-core Packagist | From 10.0.0 | 10.4.6 |
typo3/cms-core Packagist | From 9.0.0 | 9.5.20 |
typo3/cms-core Packagist | From 9.0.0 | 9.5.20 |
Products include Typo3 Typo3.
How do I fix CVE-2020-15099?
Upgrade typo3/cms to a fixed version for your release line: 10.4.6 or 9.5.20.
Is CVE-2020-15099 being exploited?
There is no known exploitation of CVE-2020-15099 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-typo3-2020-15099, GHSA-3x94-fv5h-5q2c.