CVE-2009-0255

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 9.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-01-22 · updated 2026-06-16
Weakness: CWE-330

Description

The System extension Install tool in TYPO3 4.0.0 through 4.0.9, 4.1.0 through 4.1.7, and 4.2.0 through 4.2.3 creates the encryption key with an insufficiently random seed, which makes it easier for attackers to crack the key.

Affected products

Debian Linux: 4.0
typo3: from 4.0 before 4.0.10; from 4.1.0 before 4.1.8; from 4.2.0 before 4.2.4 — fixed in 4.0.10, 4.1.8, 4.2.4

How to fix

Upgrade to a fixed version: typo3 4.0.10, 4.1.8, 4.2.4. Check the vendor advisory for mitigations.

References

http://secunia.com/advisories/33617
http://secunia.com/advisories/33679
http://typo3.org/teams/security/security-bulletins/typo3-sa-2009-001/
http://www.debian.org/security/2009/dsa-1711
http://www.securityfocus.com/bid/33376
https://exchange.xforce.ibmcloud.com/vulnerabilities/48132
http://secunia.com/advisories/33617
http://secunia.com/advisories/33679
http://typo3.org/teams/security/security-bulletins/typo3-sa-2009-001/
http://www.debian.org/security/2009/dsa-1711
http://www.securityfocus.com/bid/33376
https://exchange.xforce.ibmcloud.com/vulnerabilities/48132

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