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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
+<glsa id="201701-30">
+ <title>vzctl: Security bypass</title>
+ <synopsis>A vulnerability in vzctl might allow attackers to gain control over
+ ploop containers.
+ </synopsis>
+ <product type="ebuild">vzctl</product>
+ <announced>2017-01-11</announced>
+ <revised count="1">2017-01-11</revised>
+ <bug>560522</bug>
+ <access>local, remote</access>
+ <affected>
+ <package name="sys-cluster/vzctl" auto="yes" arch="*">
+ <unaffected range="ge">4.9.4</unaffected>
+ <vulnerable range="lt">4.9.4</vulnerable>
+ </package>
+ </affected>
+ <background>
+ <p>vzctl is a set of control tools for the OpenVZ server virtualization
+ solution.
+ </p>
+ </background>
+ <description>
+ <p>It was discovered that vzctl determined the virtual environment (VE)
+ layout based on the presence of root.hdd/DiskDescriptor.xml in the VE
+ private directory. This allows local simfs container (CT) root users to
+ change the root password for arbitrary ploop containers. This is
+ demonstrated by a symlink attack on the ploop container root.hdd file
+ which can then be used to access a control panel.
+ </p>
+ </description>
+ <impact type="normal">
+ <p>An attacker with root privileges, in a simfs-based container, could gain
+ control over ploop-based containers.
+ </p>
+ </impact>
+ <workaround>
+ <p>There is no known workaround at this time.</p>
+ </workaround>
+ <resolution>
+ <p>All vzctl users should upgrade to the latest version:</p>
+
+ <code>
+ # emerge --sync
+ # emerge --ask --oneshot --verbose "&gt;=sys-cluster/vzctl-4.9.4"
+ </code>
+ </resolution>
+ <references>
+ <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-6927">CVE-2015-6927</uri>
+ </references>
+ <metadata tag="requester" timestamp="2017-01-10T16:32:14Z">whissi</metadata>
+ <metadata tag="submitter" timestamp="2017-01-11T12:39:20Z">whissi</metadata>
+</glsa>