CVE has been marked for Analysis. Normally once in this state the CVE will be analyzed by NVD staff within 24 hours.
Products
OpenSSH
Source
secteam@freebsd.org
Tags
CVE-2024-7589 details
Last Modified : Aug. 12, 2024, 4:35 p.m.
Description
A signal handler in sshd(8) may call a logging function that is not async-signal-safe. The signal handler is invoked when a client does not authenticate within the LoginGraceTime seconds (120 by default). This signal handler executes in the context of the sshd(8)'s privileged code, which is not sandboxed and runs with full root privileges. This issue is another instance of the problem in CVE-2024-6387 addressed by FreeBSD-SA-24:04.openssh. The faulty code in this case is from the integration of blacklistd in OpenSSH in FreeBSD. As a result of calling functions that are not async-signal-safe in the privileged sshd(8) context, a race condition exists that a determined attacker may be able to exploit to allow an unauthenticated remote code execution as root.
CVSS Score
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8.1 | 9 | 10 |
|---|
Weakness
| Weakness | Name | Description |
|---|---|---|
| CWE-364 | Signal Handler Race Condition | The product uses a signal handler that introduces a race condition. |
CVSS Data
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Base Score
8.1
Exploitability Score
2.2
Impact Score
5.9
Base Severity
HIGH
Vector String : CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
References
| URL | Source |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-SA-24:08.openssh.asc | secteam@freebsd.org |
| https://www.cve.org/CVERecord?id=CVE-2006-5051 | secteam@freebsd.org |
| https://www.cve.org/CVERecord?id=CVE-2024-6387 | secteam@freebsd.org |