[gentoo-announce] [ GLSA 202105-35 ] OpenSSH: Multiple vulnerabilities

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Severity: Normal Title: OpenSSH: Multiple vulnerabilities Date: May 26, 2021 Bugs: #763048, #774090 ID: 202105-35
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Synopsis ========
Multiple vulnerabilities have been found in OpenSSH, the worst of which could allow a remote attacker to execute arbitrary code.
Background ==========
OpenSSH is a complete SSH protocol implementation that includes SFTP client and server support.
Affected packages =================
——————————————————————- Package / Vulnerable / Unaffected ——————————————————————- 1 net-misc/openssh < 8.5_p1 >= 8.5_p1
Description ===========
Multiple vulnerabilities have been discovered in OpenSSH. Please review the CVE identifiers referenced below for details.
Impact ======
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.
Workaround ==========
There is no known workaround at this time.
Resolution ==========
All OpenSSH users should upgrade to the latest version:
# emerge –sync # emerge –ask –oneshot –verbose “>=net-misc/openssh-8.5_p1”
References ==========
[ 1 ] CVE-2020-14145 nvd.nist.gov/vuln/detail/CVE-2020-14145 [ 2 ] CVE-2021-28041 nvd.nist.gov/vuln/detail/CVE-2021-28041
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
security.gentoo.org/glsa/202105-35
Concerns? =========
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users’ machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at bugs.gentoo.org.
License =======
Copyright 2021 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons – Attribution / Share Alike license.
creativecommons.org/licenses/by-sa/2.5