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TYPO3-CORE-SA-2019-016: Possible deserialization side-effects in symfony/cache

Categories: Development Created by Frank Nägler
It has been discovered that a third party dependency used by TYPO3 CMS is susceptible of being used during insecure deserialization.
  • Component Type: TYPO3 CMS
  • Vulnerable subcomponent: 3rd party component symfony/cache
  • Release Date: June 25, 2019
  • Vulnerability Type: Known Vulnerability, Modification of Dynamically-Determined Object Attributes (CWE-915)
  • Affected Versions: 9.4.0-9.5.7
  • Severity: Medium
  • Suggested CVSS v3.0: AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H/E:F/RL:O/RC:C
  • CVE: CVE-2019-10912

Problem Description

Third party component symfony/cache could have been potentially leading to removal of arbitrary files in combination with other insecure deserialization vulnerabilities.

Find more details in Symfony’s security advisory at https://symfony.com/blog/cve-2019-10912-prevent-destructors-with-side-effects-from-being-unserialized

Solution

Update to TYPO3 version 9.5.8 that fix the problem described.

Credits

Thanks to TYPO3 security team member Oliver Hader who reported this issue and to TYPO3 core team member Frank Nägler  who fixed the issue.

General Advice

Follow the recommendations that are given in the TYPO3 Security Guide. Please subscribe to the typo3-announce mailing list.

General Note

All security related code changes are tagged so that you can easily look them up in our review system.