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TITLE:
Typo3 Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA33617

VERIFY ADVISORY:
http://secunia.com/advisories/33617/

CRITICAL:
Highly critical

IMPACT:
Hijacking, Security Bypass, Cross Site Scripting, System access

WHERE:
>From remote

SOFTWARE:
TYPO3 4.x
http://secunia.com/advisories/product/12113/

DESCRIPTION:
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.

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

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

3) 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.

4) 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.

5) 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.

SOLUTION:
Update to Typo3 version 4.0.10, 4.1.8, or 4.2.4.

Generate a new encryption key (see vendor's advisory for more
information).

PROVIDED AND/OR DISCOVERED BY:
The vendor credits:
1) Chris John Riley of Raiffeisen Informatik, CERT Security
Competence Center Zwettl
2) Marcus Krause
3, 4) Mads Olesen
5) Daniel Fabian, SEC Consult

ORIGINAL ADVISORY:
TYPO3-SA-2009-001:
http://typo3.org/teams/security/security-bulletins/typo3-sa-2009-001/

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