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