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OpenAdvisories
High ALAS2-2023-2176 1 CVE

Important: openssh security update (Amazon Linux 2)

Published Aug 3, 2023 · Updated Aug 8, 2023

Summary

Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2023-38408: The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path, leading to remote code execution if the target user's ssh-agent is forwarded to an attacker-controlled system (the code in /usr/lib is not necessarily safe for loading into ssh-agent). Exploitation can also be prevented by starting ssh-agent with an empty PKCS#11/FIDO allowlist (ssh-agent -P '') or by configuring an allowlist that contains only specific provider libraries. NOTE: this issue exists because of an incomplete fix for CVE-2016-10009.

Fixed packages 10

ReleasePackageFixed in
Amazon Linux · 2 openssh 0:7.4p1-22.amzn2.0.3
Amazon Linux · 2 openssh-askpass 0:7.4p1-22.amzn2.0.3
Amazon Linux · 2 openssh-cavs 0:7.4p1-22.amzn2.0.3
Amazon Linux · 2 openssh-clients 0:7.4p1-22.amzn2.0.3
Amazon Linux · 2 openssh-debuginfo 0:7.4p1-22.amzn2.0.3
Amazon Linux · 2 openssh-keycat 0:7.4p1-22.amzn2.0.3
Amazon Linux · 2 openssh-ldap 0:7.4p1-22.amzn2.0.3
Amazon Linux · 2 openssh-server 0:7.4p1-22.amzn2.0.3
Amazon Linux · 2 openssh-server-sysvinit 0:7.4p1-22.amzn2.0.3
Amazon Linux · 2 pam_ssh_agent_auth 0:0.10.3-2.22.amzn2.0.3

Vulnerabilities 1

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2023-38408.html