Exposure of Sensitive Information to an Unauthorized Actor in TYPO3 CMS
CVE-2020-15099

8.1HIGH

Key Information:

Vendor

Typo3

Status
Typo3 Cms
Vendor
CVE Published:
29 July 2020

What is CVE-2020-15099?

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.

Affected Version(s)

TYPO3 CMS >= 9.0.0, < 9.5.20 < 9.0.0, 9.5.20

TYPO3 CMS >= 10.0.0, 10.4.6 >= 10.0.0, 10.4.6

References

https://github.com/TYPO3/TYPO3.CMS/security/advisories/GH...
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https://typo3.org/security/advisory/typo3-core-sa-2020-007
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CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.