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FreeBSD : OpenSSH -- Pre-authentication async signal safety issue (58750d49-7302-11ef-8c95-195d300202b3)

high Nessus Plugin ID 207372

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 58750d49-7302-11ef-8c95-195d300202b3 advisory.

 The FreeBSD Project reports:

 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.


Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://nvd.nist.gov/vuln/detail/CVE-2024-7589

http://www.nessus.org/u?818f4f2e

Plugin Details

Severity: High

ID: 207372

File Name: freebsd_pkg_58750d49730211ef8c95195d300202b3.nasl

Version: 1.2

Type: local

Published: 9/18/2024

Updated: 9/21/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 8.4

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 5.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2024-7589

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:openssh-portable, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 9/15/2024

Vulnerability Publication Date: 8/11/2024

Reference Information

CVE: CVE-2024-7589

IAVA: 2024-A-0485-S