CVE-2024-6409
Openssh: possible remote code execution due to a race condition in signal handling affecting red hat enterprise linux 9
We use these services and cookies to improve your user experience. You may opt out if you wish, however, this may limit some features on this site.
Please see our statement on Data Privacy.
Openssh: possible remote code execution due to a race condition in signal handling affecting red hat enterprise linux 9
| Assigner | redhat |
| Reserved | 2024-06-28 |
| Published | 2024-07-08 |
| Updated | 2024-09-12 |
A race condition vulnerability was discovered in how signals are handled by OpenSSH's server (sshd). If a remote attacker does not authenticate within a set time period, then sshd's SIGALRM handler is called asynchronously. However, this signal handler calls various functions that are not async-signal-safe, for example, syslog(). As a consequence of a successful attack, in the worst case scenario, an attacker may be able to perform a remote code execution (RCE) as an unprivileged user running the sshd server.
| CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H |
| 2024-07-01: | Reported to Red Hat. |
| 2024-07-08: | Made public. |
Red Hat would like to thank Solar Designer (CIQ/Rocky Linux) for reporting this issue.
https://access.redhat.com/errata/RHSA-2024:4457 (RHSA-2024:4457)
https://access.redhat.com/errata/RHSA-2024:4613 (RHSA-2024:4613)
https://access.redhat.com/errata/RHSA-2024:4716 (RHSA-2024:4716)
https://access.redhat.com/errata/RHSA-2024:4910 (RHSA-2024:4910)
https://access.redhat.com/errata/RHSA-2024:4955 (RHSA-2024:4955)
https://access.redhat.com/errata/RHSA-2024:4960 (RHSA-2024:4960)
https://access.redhat.com/errata/RHSA-2024:5444 (RHSA-2024:5444)
https://access.redhat.com/security/cve/CVE-2024-6409
https://bugzilla.redhat.com/show_bug.cgi?id=2295085 (RHBZ#2295085)
