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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 4.0 | typo3-src | 4.0.2+debian-7 | DSA-1711-1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Metasploit 1 module
-
TYPO3 sa-2009-001 Weak Encryption Key File Disclosure
auxiliary/admin/http/typo3_sa_2009_001
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 1
- DSA-1711-1 typo3-src - remote code execution Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://typo3.org/teams/security/security-bulletins/typo3-sa-2009-001/
- 33617 third-party-advisory
- DSA-1711 vendor-advisory
- typo3-installtool-weak-security(48132) vdb-entry
- 33376 vdb-entry
- 33679 third-party-advisory