CVE-2009-0256 Authentication library in TYPO3 vulnerable to session fixation

What is CVE-2009-0256?

CVE-2009-0256 is a high-severity authentication bypass vulnerability in Typo3 Typo3, published on 22 Jan 2009. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Session fixation vulnerability in the authentication library in TYPO3 4.0.0 through 4.0.9, 4.1.0 through 4.1.7, and 4.2.0 through 4.2.3 allows remote attackers to hijack web sessions via unspecified vectors related to (1) frontend and (2) backend authentication.

Weakness: CWE-287

Which versions are affected by CVE-2009-0256?

6 open source packages ship an affected version, including typo3/cms. It affects 1 product.

Products include Typo3 Typo3.

How do I fix CVE-2009-0256?

Upgrade typo3/cms to a fixed version for your release line: 4.0.10, 4.1.8 or 4.2.4.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2009-0256 being exploited?

There is no known exploitation of CVE-2009-0256 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-q45q-5233-229p.