GLSA 202105-35: OpenSSH: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	OpenSSH: Multiple vulnerabilities
Date:	05/26/2021
Bugs:	#763048, #774090
ID:	202105-35

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	Architecture(s)
net-misc/openssh	< 8.5_p1	>= 8.5_p1	All supported architectures

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

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202105-35.xml

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 https://bugs.gentoo.org.