Multiple cross-site scripting (XSS) vulnerabilities in TYPO3 4.0.0 through 4.0.9, 4.1.0 through 4.1.7, and 4.2.0 through 4.2.3 allow remote attackers to inject arbitrary web script or HTML via the (1) name and (2) content of indexed files to the (a) Indexed Search Engine (indexed_search) system extension; (b) unspecified test scripts in the ADOdb system extension; and (c) unspecified vectors in the Workspace module.

Secunia reports :

Some vulnerabilities have been reported in Typo3, which can be exploited by malicious people to bypass certain security restrictions, conduct cross-site scripting and session fixation attacks, and compromise a vulnerable system.

The 'Install tool' system extension uses insufficiently random entropy sources to generate an encryption key, resulting in weak security.

The authentication library does not properly invalidate supplied session tokens, which can be exploited to hijack a user's session.

Certain unspecified input passed to the 'Indexed Search Engine' system extension is not properly sanitised before being used to invoke commands. This can be exploited to inject and execute arbitrary shell commands.

Input passed via the name and content of files to the 'Indexed Search Engine' system extension is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

Certain unspecified input passed to the Workspace module is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

Note: It is also reported that certain unspecified input passed to test scripts of the 'ADOdb' system extension is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected website.

Several remotely exploitable vulnerabilities have been discovered in the TYPO3 web content management framework. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2009-0255     Chris John Riley discovered that the TYPO3-wide used     encryption key is generated with an insufficiently     random seed resulting in low entropy which makes it     easier for attackers to crack this key.

  - CVE-2009-0256     Marcus Krause discovered that TYPO3 is not invalidating     a supplied session on authentication which allows an     attacker to take over a victims session via a session     fixation attack.

  - CVE-2009-0257     Multiple cross-site scripting vulnerabilities allow     remote attackers to inject arbitrary web script or HTML     via various arguments and user-supplied strings used in     the indexed search system extension, adodb extension     test scripts or the workspace module.

  - CVE-2009-0258     Mads Olesen discovered a remote command injection     vulnerability in the indexed search system extension     which allows attackers to execute arbitrary code via a     crafted file name which is passed unescaped to various     system tools that extract file content for the indexing.

Because of CVE-2009-0255, please make sure that besides installing this update, you also create a new encryption key after the installation.

ID	Name	Product	Family	Severity
35624	FreeBSD : typo3 -- multiple vulnerabilities (653606e9-f6ac-11dd-94d9-0030843d3802)	Nessus	FreeBSD Local Security Checks	critical
35463	Debian DSA-1711-1 : typo3-src - several vulnerabilities	Nessus	Debian Local Security Checks	critical

Detections

Analytics

CVE-2009-0257

medium

Tenable Plugins

critical

critical