CVE-2020-15099

Exposure of Sensitive Information to an Unauthorized Actor in TYPO3 CMS

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.

Category

8.1
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.19% Top 25%
Vendor Advisory github.com Vendor Advisory typo3.org
Affected: TYPO3 TYPO3 CMS
Published at:
Updated at:

References

Link Tags
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-3x94-fv5h-5q2c vendor advisory
https://typo3.org/security/advisory/typo3-core-sa-2020-007 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-15099?
CVE-2020-15099 has been scored as a high severity vulnerability.
How to fix CVE-2020-15099?
To fix CVE-2020-15099, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-15099 being actively exploited in the wild?
It is possible that CVE-2020-15099 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-15099?
CVE-2020-15099 affects TYPO3 TYPO3 CMS.
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