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<?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="201903-05">
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<title>Tar: Denial of service</title>
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<synopsis>A vulnerability in Tar could led to a Denial of Service condition.</synopsis>
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<product type="ebuild">tar</product>
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<announced>2019-03-10</announced>
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<revised count="1">2019-03-10</revised>
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<bug>674210</bug>
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<access>local</access>
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<affected>
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<package name="app-arch/tar" auto="yes" arch="*">
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<unaffected range="ge">1.30-r1</unaffected>
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<vulnerable range="lt">1.30-r1</vulnerable>
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</package>
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</affected>
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<background>
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<p>The Tar program provides the ability to create and manipulate tar
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archives.
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</p>
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</background>
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<description>
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<p>The sparse_dump_region function in sparse.c file in Tar allows an
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infinite loop using the --sparse option.
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</p>
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</description>
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<impact type="normal">
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<p>A local attacker could cause a Denial of Service condition by modifying
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a file that is supposed to be archived by a different user’s process
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(e.g., a system backup running as root).
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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 Tar 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 ">=app-arch/tar-1.30-r1"
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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/vuln/detail/CVE-2018-20482">CVE-2018-20482</uri>
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</references>
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<metadata tag="requester" timestamp="2019-03-10T16:20:01Z">Zlogene</metadata>
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<metadata tag="submitter" timestamp="2019-03-10T20:04:34Z">Zlogene</metadata>
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</glsa>
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