Amazon Linux 2023 Security Advisory: ALAS-2024-649
Advisory Release Date: 2024-06-26 21:55 Pacific
Advisory Updated Date: 2024-07-01 12:30 Pacific
Severity:
Important
Issue Overview:
A signal handler race condition was found in OpenSSH's server (sshd), where a client does not authenticate within LoginGraceTime seconds (120 by default, 600 in old OpenSSH versions), then sshd's SIGALRM handler is called asynchronously. However, this signal handler calls various functions that are not async-signal-safe, for example, syslog().
Affected Packages:
openssh
Issue Correction:
Run dnf update openssh --releasever 2023.5.20240701 to update your system.
New Packages:
aarch64:
openssh-keycat-debuginfo-8.7p1-8.amzn2023.0.11.aarch64
openssh-server-debuginfo-8.7p1-8.amzn2023.0.11.aarch64
openssh-debuginfo-8.7p1-8.amzn2023.0.11.aarch64
openssh-server-8.7p1-8.amzn2023.0.11.aarch64
openssh-keycat-8.7p1-8.amzn2023.0.11.aarch64
pam_ssh_agent_auth-debuginfo-0.10.4-4.8.amzn2023.0.11.aarch64
openssh-8.7p1-8.amzn2023.0.11.aarch64
pam_ssh_agent_auth-0.10.4-4.8.amzn2023.0.11.aarch64
openssh-clients-8.7p1-8.amzn2023.0.11.aarch64
openssh-clients-debuginfo-8.7p1-8.amzn2023.0.11.aarch64
openssh-debugsource-8.7p1-8.amzn2023.0.11.aarch64
src:
openssh-8.7p1-8.amzn2023.0.11.src
x86_64:
openssh-clients-debuginfo-8.7p1-8.amzn2023.0.11.x86_64
openssh-debuginfo-8.7p1-8.amzn2023.0.11.x86_64
openssh-server-8.7p1-8.amzn2023.0.11.x86_64
openssh-server-debuginfo-8.7p1-8.amzn2023.0.11.x86_64
pam_ssh_agent_auth-debuginfo-0.10.4-4.8.amzn2023.0.11.x86_64
pam_ssh_agent_auth-0.10.4-4.8.amzn2023.0.11.x86_64
openssh-keycat-debuginfo-8.7p1-8.amzn2023.0.11.x86_64
openssh-keycat-8.7p1-8.amzn2023.0.11.x86_64
openssh-8.7p1-8.amzn2023.0.11.x86_64
openssh-clients-8.7p1-8.amzn2023.0.11.x86_64
openssh-debugsource-8.7p1-8.amzn2023.0.11.x86_64