TYPO3 CMS Recursive Error Handler DoS (v<9.5.38/10.4.33/11.5.20/12.1.1)
CVE-2022-23500 Published on December 14, 2022
TYPO3 subject to Uncontrolled Recursion resulting in Denial of Service
TYPO3 is an open source PHP based web content management system. In versions prior to 9.5.38, 10.4.33, 11.5.20, and 12.1.1, requesting invalid or non-existing resources via HTTP triggers the page error handler, which again could retrieve content to be shown as an error message from another page. This leads to a scenario in which the application is calling itself recursively - amplifying the impact of the initial attack until the limits of the web server are exceeded. This vulnerability is very similar, but not identical, to the one described in CVE-2021-21359. This issue is patched in versions 9.5.38 ELTS, 10.4.33, 11.5.20 or 12.1.1.
Vulnerability Analysis
CVE-2022-23500 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Stack Exhaustion Vulnerability?
The product does not properly control the amount of recursion which takes place, consuming excessive resources, such as allocated memory or the program stack.
CVE-2022-23500 has been classified to as a Stack Exhaustion vulnerability or weakness.
Products Associated with CVE-2022-23500
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Affected Versions
typo3:- Version >= 9.0.0, < 9.5.38 is affected.
- Version >= 10.0.0, < 10.4.33 is affected.
- Version >= 11.0.0, < 11.5.20 is affected.
- Version >= 12.0.0, < 12.1.0 is affected.
Vulnerable Packages
The following package name and versions may be associated with CVE-2022-23500
| Package Manager | Vulnerable Package | Versions | Fixed In |
|---|---|---|---|
| composer | typo3/cms-core | >= 9.0.0, < 9.5.38 | 9.5.38 |
| composer | typo3/cms-core | >= 10.0.0, < 10.4.33 | 10.4.33 |
| composer | typo3/cms-core | >= 11.0.0, < 11.5.20 | 11.5.20 |
| composer | typo3/cms | >= 10.0.0, < 10.4.33 | 10.4.33 |
| composer | typo3/cms | >= 11.0.0, < 11.5.20 | 11.5.20 |
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.