53 lines
1.8 KiB
XML
53 lines
1.8 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="202004-08">
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<title>libssh: Denial of Service</title>
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<synopsis>A vulnerability in libssh could allow a remote attacker to cause a
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Denial of Service condition.
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</synopsis>
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<product type="ebuild">libssh</product>
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<announced>2020-04-10</announced>
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<revised count="1">2020-04-10</revised>
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<bug>716788</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">0.9.4</unaffected>
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<vulnerable range="lt">0.9.4</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>It was discovered that libssh could crash when AES-CTR ciphers are used.</p>
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</description>
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<impact type="low">
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<p>A remote attacker running a malicious client or server could possibly
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crash the counterpart implemented with libssh and cause a Denial of
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Service condition.
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</p>
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</impact>
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<workaround>
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<p>Disable AES-CTR ciphers. If you implement a server using libssh it is
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recommended to use a prefork model so each session runs in an own
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process.
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</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-0.9.4"
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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/vuln/detail/CVE-2020-1730">CVE-2020-1730</uri>
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</references>
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<metadata tag="requester" timestamp="2020-04-10T21:38:04Z">whissi</metadata>
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<metadata tag="submitter" timestamp="2020-04-10T21:45:49Z">whissi</metadata>
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</glsa>
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