phpBB 2.0.23 Session Hijacking Vulnerability

2009.09.03

Credit: nbbn

Risk: Medium

Local: No

Remote: Yes

CVE: CVE-2008-7143

CWE: CWE-200

CVSS Base Score: 6.8/10

Impact Subscore: 6.4/10

Exploitability Subscore: 8.6/10

Exploit range: Remote

Attack complexity: Medium

Authentication: No required

Confidentiality impact: Partial

Integrity impact: Partial

Availability impact: Partial

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
phpBB 2.0.23 Session Hijacking Vulnerability +
found by NBBN 13 Mar 2008 +
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
::Information about this vulnerabilty
If a moderator or an admin close a thread in phpBB 2.0.X, the sessionid
is sending with GET:
http://site.tld/phpBB2/modcp.php?t=1&mode=lock&sid=[session]
The admin/moderator are going to be redirected to the thread(with the
session). If an attacker has posted an image in his post, he can see the
referer and so the session id. And if the attacker have a good day and
the admin close the thread, he can use all admin-functions with csrf.
::Fix
No fix
::Workaround
Upgrade to phpBB3
::Tested under:
phpBB 2.0.23 (localhost)

References:

http://www.securityfocus.com/archive/1/archive/1/489815/100/0/threaded

http://osvdb.org/51121

See this note in RAW Version

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phpBB 2.0.23 Session Hijacking Vulnerability

References:

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