<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> <glsa id="202105-35"> <title>OpenSSH: Multiple vulnerabilities</title> <synopsis>Multiple vulnerabilities have been found in OpenSSH, the worst of which could allow a remote attacker to execute arbitrary code. </synopsis> <product type="ebuild">openssh</product> <announced>2021-05-26</announced> <revised count="1">2021-05-26</revised> <bug>763048</bug> <bug>774090</bug> <access>local, remote</access> <affected> <package name="net-misc/openssh" auto="yes" arch="*"> <unaffected range="ge">8.5_p1</unaffected> <vulnerable range="lt">8.5_p1</vulnerable> </package> </affected> <background> <p>OpenSSH is a complete SSH protocol implementation that includes SFTP client and server support. </p> </background> <description> <p>Multiple vulnerabilities have been discovered in OpenSSH. Please review the CVE identifiers referenced below for details. </p> </description> <impact type="normal"> <p>A remote attacker, able to access the socket of the forwarding agent, might be able to execute arbitrary code with the privileges of the process or cause a Denial of Service condition. Furthermore, a remote attacker might conduct a man-in-the-middle attack targeting initial connection attempts where no host key for the server has been cached by client yet. </p> </impact> <workaround> <p>There is no known workaround at this time.</p> </workaround> <resolution> <p>All OpenSSH users should upgrade to the latest version:</p> <code> # emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/openssh-8.5_p1" </code> </resolution> <references> <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-14145">CVE-2020-14145</uri> <uri link="https://nvd.nist.gov/vuln/detail/CVE-2021-28041">CVE-2021-28041</uri> </references> <metadata tag="requester" timestamp="2021-05-24T00:47:38Z">whissi</metadata> <metadata tag="submitter" timestamp="2021-05-26T10:35:06Z">whissi</metadata> </glsa>