Summary
Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2024-6387: 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().
Fixed packages 11
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2023 | openssh | 0:8.7p1-8.amzn2023.0.11 |
| Amazon Linux · 2023 | openssh-clients | 0:8.7p1-8.amzn2023.0.11 |
| Amazon Linux · 2023 | openssh-clients-debuginfo | 0:8.7p1-8.amzn2023.0.11 |
| Amazon Linux · 2023 | openssh-debuginfo | 0:8.7p1-8.amzn2023.0.11 |
| Amazon Linux · 2023 | openssh-debugsource | 0:8.7p1-8.amzn2023.0.11 |
| Amazon Linux · 2023 | openssh-keycat | 0:8.7p1-8.amzn2023.0.11 |
| Amazon Linux · 2023 | openssh-keycat-debuginfo | 0:8.7p1-8.amzn2023.0.11 |
| Amazon Linux · 2023 | openssh-server | 0:8.7p1-8.amzn2023.0.11 |
| Amazon Linux · 2023 | openssh-server-debuginfo | 0:8.7p1-8.amzn2023.0.11 |
| Amazon Linux · 2023 | pam_ssh_agent_auth | 0:0.10.4-4.8.amzn2023.0.11 |
| Amazon Linux · 2023 | pam_ssh_agent_auth-debuginfo | 0:0.10.4-4.8.amzn2023.0.11 |
Vulnerabilities 1
-
High 8.1
Openssh: regresshion - race condition in ssh allows rce/dos
A security regression (CVE-2006-5051) was discovered in OpenSSH's server (sshd). There is a race condition which can lead sshd to handle some signals in an unsafe manner. An unauthenticated, remote attacker may be able to trigger it by failing to authenticate…
References
-
web
https://alas.aws.amazon.com/cve/html/CVE-2024-6387.html