glsa-202407-09.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="202407-09">
    <title>OpenSSH: Remote Code Execution</title>
    <synopsis>A vulnerability has been discovered in OpenSSH, which can lead to remote code execution with root privileges.</synopsis>
    <product type="ebuild">openssh</product>
    <announced>2024-07-01</announced>
    <revised count="1">2024-07-01</revised>
    <bug>935271</bug>
    <access>remote</access>
    <affected>
        <package name="net-misc/openssh" auto="yes" arch="*">
            <unaffected range="ge">9.7_p1-r6</unaffected>
            <vulnerable range="lt">9.7_p1-r6</vulnerable>
        </package>
    </affected>
    <background>
        <p>OpenSSH is a free application suite consisting of server and clients that replace tools like telnet, rlogin, rcp and ftp with more secure versions offering additional functionality.</p>
    </background>
    <description>
        <p>A vulnerability has been discovered in OpenSSH. Please review the CVE identifier referenced below for details.</p>
    </description>
    <impact type="high">
        <p>A critical vulnerability in sshd(8) was present in Portable OpenSSH
versions that may allow arbitrary code execution with root privileges.

Successful exploitation has been demonstrated on 32-bit Linux/glibc
systems with ASLR. Under lab conditions, the attack requires on
average 6-8 hours of continuous connections up to the maximum the
server will accept. Exploitation on 64-bit systems is believed to be
possible but has not been demonstrated at this time. It&#39;s likely that
these attacks will be improved upon.</p>
    </impact>
    <workaround>
        <p>There is no known workaround at this time.

Note that Gentoo has backported the fix to the following versions:

net-misc/openssh-9.6_p1-r5
net-misc/openssh-9.7_p1-r6</p>
    </workaround>
    <resolution>
        <p>All OpenSSH users should upgrade to the latest version and restart the sshd server (to ensure access for new sessions and no vulnerable code keeps running).</p>
        
        <code>
          # emerge --sync
          # emerge --ask --oneshot --verbose ">=net-misc/openssh-9.7_p1-r6"
        </code>
        
        <p>With OpenRC:</p>
        
        <code>
          # rc-service sshd restart
        </code>
        
        <p>With systemd:</p>
        
        <code>
          #  systemctl try-restart sshd.service
        </code>
    </resolution>
    <references>
        <uri link="https://nvd.nist.gov/vuln/detail/CVE-2024-6387">CVE-2024-6387</uri>
    </references>
    <metadata tag="requester" timestamp="2024-07-01T18:03:48.914047Z">graaff</metadata>
    <metadata tag="submitter" timestamp="2024-07-01T18:03:48.917560Z">graaff</metadata>
</glsa>