glsa-202208-21.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="202208-21">
    <title>libebml: Heap buffer overflow vulnerability</title>
    <synopsis>A heap-based buffer overflow in libeml might allow attackers to execute arbitrary code.</synopsis>
    <product type="ebuild">libebml</product>
    <announced>2022-08-14</announced>
    <revised count="1">2022-08-14</revised>
    <bug>772272</bug>
    <access>remote</access>
    <affected>
        <package name="dev-libs/libebml" auto="yes" arch="arm ppc sparc x86">
            <unaffected range="ge">1.4.2</unaffected>
            <vulnerable range="lt">1.4.2</vulnerable>
        </package>
    </affected>
    <background>
        <p>libebml is a C++ library to parse EBML files.</p>
    </background>
    <description>
        <p>On 32bit builds of libebml, the length of a string is miscalculated, potentially leading to an exploitable heap overflow.</p>
    </description>
    <impact type="high">
        <p>An attacker able to provide arbitrary input to libebml could achieve arbitrary code execution.</p>
    </impact>
    <workaround>
        <p>There is no known workaround at this time.</p>
    </workaround>
    <resolution>
        <p>Users of libebml on 32 bit architectures should upgrade to the latest version:</p>
        
        <code>
          # emerge --sync
          # emerge --ask --oneshot --verbose ">=dev-libs/libebml-1.4.2"
        </code>
    </resolution>
    <references>
        <uri link="https://nvd.nist.gov/vuln/detail/CVE-2021-3405">CVE-2021-3405</uri>
    </references>
    <metadata tag="requester" timestamp="2022-08-14T00:09:54.090013Z">ajak</metadata>
    <metadata tag="submitter" timestamp="2022-08-14T00:09:54.093255Z">ajak</metadata>
</glsa>