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The Sourcefire Vulnerability Research Team (VRT) has learned of a worm
traversing the Internet that targets known vulnerabilities in certain
PHP and CGI scripts. The worm, known as Lupper or Plupii, makes
requests on port 80 for various scripts such as xmlrpc.php and
awstats.pl.
The Sourcefire VRT has confirmed that a rule identified as sid 3827,
released on July 22, 2005, will generate events when this worm tries
to exploit the vulnerability in the PHP XML-RPC module. The Sourcefire
VRT has also confirmed that a rule identified as sid 3813, released on
June 30, 2005, will generate events when the worm tries to use the
awstats vulnerability as an attack vector.
Details:
Analysis of the worm indicates that it attempts to exploit a weakness
in the PHP XML-RPC module by making a malicious POST request to the
xmlrpc.php script used by some PHP based applications. The worm may
also try to exploit a weakness in the awstats application that can
allow command execution on an affected host.
Successful exploitation results in the worm downloading a Trojan Horse
program named lupii, that opens either port 7111 or 7222 to establish
a UDP based control channel. The infected host then starts to perform
a scan to detect other potential victims at random IP addresses. Once
a host is identified, the worm then attempts to spread using the
attack vectors outlined above.
A detailed advisory is available at
http://www.snort.org/rules/advisories/vrt-rules-2005-11-08.html
- - Sourcefire VRT
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