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.
References
| Link | Resource |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-SA-24:08.openssh.asc | Vendor Advisory |
| https://www.cve.org/CVERecord?id=CVE-2006-5051 | Not Applicable |
| https://www.cve.org/CVERecord?id=CVE-2024-6387 | Third Party Advisory |
Configurations
Configuration 1 (hide)
|
History
13 Aug 2024, 16:58
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:freebsd:freebsd:13.3:p2:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.1:p2:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.3:p3:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.3:p1:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.0:beta5:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.0:p2:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.0:p1:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.0:p7:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.0:rc4-p1:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.0:p5:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.0:p6:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.3:p4:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.0:p8:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.1:p1:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.0:p3:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.0:p4:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.0:rc3:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:* |
|
| References | () https://security.freebsd.org/advisories/FreeBSD-SA-24:08.openssh.asc - Vendor Advisory | |
| References | () https://www.cve.org/CVERecord?id=CVE-2024-6387 - Third Party Advisory | |
| References | () https://www.cve.org/CVERecord?id=CVE-2006-5051 - Not Applicable | |
| CWE | CWE-362 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 8.1 |
| First Time |
Freebsd
Freebsd freebsd |
12 Aug 2024, 13:41
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-08-12 13:38
Updated : 2024-08-13 16:58
NVD link : CVE-2024-7589
Mitre link : CVE-2024-7589
JSON object : View
Products Affected
freebsd
- freebsd
CWE
CWE-362
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')