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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="202011-05">
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<title>libssh: Denial of service</title>
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<synopsis>A vulnerability in libssh could lead to a Denial of Service
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condition.
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</synopsis>
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<product type="ebuild">libssh</product>
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<announced>2020-11-03</announced>
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<revised count="1">2020-11-03</revised>
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<bug>734624</bug>
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<access>remote</access>
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<affected>
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<package name="net-libs/libssh" auto="yes" arch="*">
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<unaffected range="ge">0.9.5</unaffected>
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<vulnerable range="lt">0.9.5</vulnerable>
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</package>
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</affected>
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<background>
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<p>libssh is a multiplatform C library implementing the SSHv2 protocol on
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client and server side.
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</p>
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</background>
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<description>
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<p>libssh was found to have a NULL pointer dereference in tftpserver.c if
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the function ssh_buffer_new returns NULL.
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</p>
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</description>
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<impact type="normal">
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<p>An attacker could cause a possible Denial of Service condition.</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 libssh 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 ">=net-libs/libssh-0.9.5"
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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-2020-16135">CVE-2020-16135</uri>
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</references>
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<metadata tag="requester" timestamp="2020-10-15T18:56:19Z">sam_c</metadata>
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<metadata tag="submitter" timestamp="2020-11-03T00:34:45Z">sam_c</metadata>
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</glsa>
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