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<?xml version="1.0" encoding="utf-8"?>
<glsa id="200512-02">
<title>Webmin, Usermin: Format string vulnerability</title>
Webmin and Usermin are vulnerable to a format string vulnerability which
may lead to the execution of arbitrary code.
<product type="ebuild">webmin usermin</product>
<announced>December 07, 2005</announced>
<revised>December 07, 2005: 01</revised>
<package name="app-admin/webmin" auto="yes" arch="*">
<unaffected range="ge">1.250</unaffected>
<vulnerable range="lt">1.250</vulnerable>
<package name="app-admin/usermin" auto="yes" arch="*">
<unaffected range="ge">1.180</unaffected>
<vulnerable range="lt">1.180</vulnerable>
Webmin is a web-based interface for Unix-like systems. Usermin is
a simplified version of Webmin designed for use by normal users rather
than system administrators.
Jack Louis discovered that the Webmin and Usermin ""
web server component is vulnerable to a Perl format string
vulnerability. Login with the supplied username is logged via the Perl
"syslog" facility in an unsafe manner.
<impact type="high">
A remote attacker can trigger this vulnerability via a specially
crafted username containing format string data. This can be exploited
to consume a large amount of CPU and memory resources on a vulnerable
system, and possibly to execute arbitrary code of the attacker's choice
with the permissions of the user running Webmin.
There is no known workaround at this time.
All Webmin users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=app-admin/webmin-1.250&quot;</code>
All Usermin users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=app-admin/usermin-1.180&quot;</code>
<uri link="">CVE-2005-3912</uri>
<uri link="">Dyad Security Advisory</uri>
<metadata tag="requester" timestamp="Thu, 01 Dec 2005 16:39:12 +0000">
<metadata tag="bugReady" timestamp="Sun, 04 Dec 2005 19:02:00 +0000">
<metadata tag="submitter" timestamp="Mon, 05 Dec 2005 03:16:21 +0000">