CVE-2014-9509: Input Validation
Problem Description: A request URL with arbitrary arguments, but still pointing to the home page of a TYPO3 installation can be cached if the configuration option config.prefixLocalAnchors is used with the values "all" or "cached". The impact of this vulnerability is that unfamiliar looking links to the home page can end up in the cache, which leads to a reload of the page in the browser when section links are followed by web page visitors, instead of just directly jumping to the requested section of the page. TYPO3 versions 4.6.x and higher are only affected if the homepage is not a shortcut to a different page.
Solution: Removing the configuration options config.prefixLocalAnchors (and optionally also config.baseUrl) in favor of config.absRefPrefix
Credits: Thanks to Gernot Leitgab who discovered and reported the vulnerability.
Other sources
The frontend rendering component in TYPO3 4.5.x before 4.5.39, 4.6.x through 6.2.x before 6.2.9, and 7.x before 7.0.2, when config.prefixLocalAnchors is set to all or cached, allows remote attackers to have an unspecified impact (possibly resource consumption) via a "Cache Poisoning" attack using a URL with arbitrary arguments, which triggers a reload of the page.
— MITRE
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2014-9509?
CVE-2014-9509 is considered to have a moderate severity level due to its potential impact on TYPO3 installations.
How do I fix CVE-2014-9509?
To fix CVE-2014-9509, you should upgrade to TYPO3 versions 4.5.21, 4.6.19, 4.7.21, 6.0.15, 6.1.13, or 6.2.9.
Which versions of TYPO3 are affected by CVE-2014-9509?
CVE-2014-9509 affects TYPO3 versions from 4.5.0 to 6.1.12 and 6.2.0 to 6.2.8.
What are the consequences of exploiting CVE-2014-9509?
Exploiting CVE-2014-9509 may lead to caching issues that cause leakage of sensitive information through unexpected URLs.
Is there any workaround for CVE-2014-9509?
A temporary workaround for CVE-2014-9509 may involve disabling the `config.prefixLocalAnchors` option until an upgrade can be performed.