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Vulnerability · Published Jul 29, 2020 · Assigned by GitHub_M

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

High 8.1

In plain English

A high-severity information exposure in TYPO3 CMS from TYPO3. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.8% (higher than 78% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High
Exploit odds (30 days)1.8%top 21.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Packagisttypo3/cms10.4.6GHSA-3x94-fv5h-5q2c
Packagisttypo3/cms9.5.20GHSA-3x94-fv5h-5q2c
Packagisttypo3/cms-core9.5.20GHSA-3x94-fv5h-5q2c
Packagisttypo3/cms-core10.4.6GHSA-3x94-fv5h-5q2c

Affected products (as reported)

VendorProductVersions
TYPO3 TYPO3 CMS >= 9.0.0, < 9.5.20>= 10.0.0, 10.4.6

Weakness: CWE-200, CWE-20 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References