CVE-2019-19849 TYPO3 Insecure Deserialization in Query Generator & Query View

What is CVE-2019-19849?

CVE-2019-19849 is a high-severity unsafe deserialization vulnerability in Typo3 Typo3, published on 17 Dec 2019. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

An issue was discovered in TYPO3 before 8.7.30, 9.x before 9.5.12, and 10.x before 10.2.2. It has been discovered that the classes QueryGenerator and QueryView are vulnerable to insecure deserialization. One exploitable scenario requires having the system extension ext:lowlevel (Backend Module: DB Check) installed, with a valid backend user who has administrator privileges. The other exploitable scenario requires having the system extension ext:sys_action installed, with a valid backend user who has limited privileges.

Weakness: CWE-502

Which versions are affected by CVE-2019-19849?

12 open source packages ship an affected version, including typo3/cms and typo3/cms-core. It affects 1 product.

Products include Typo3 Typo3.

How do I fix CVE-2019-19849?

Upgrade typo3/cms to a fixed version for your release line: 10.2.1, 8.7.30 or 9.5.12.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2019-19849 being exploited?

There is no known exploitation of CVE-2019-19849 in the wild and no public exploit code.

Other vulnerabilities in Typo3 Typo3

• CVE-2009-0258 Indexed Search Engine for TYPO3 Command Execution via Metacharacter Injection Critical 10.0
• CVE-2011-3583 Typo3 SQL injection due to faulty prepared statements Critical 9.8
• CVE-2011-4628 Typo3 Authentication Bypass Critical 9.8
• CVE-2023-24814 Persisted Cross-Site Scripting in Frontend Rendering in typo3 High 8.8
• CVE-2021-41113 Cross-Site-Request-Forgery in Backend URI Handling in Typo3 High 8.8

All Typo3 Typo3 vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-rcgc-4xfc-564v.