CVE-2024-7589

Published Aug 12, 2024

Last updated 3 months ago

CVSS high 8.1

Overview

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.
Source: secteam@freebsd.org
NVD status: Analyzed

Risk scores

CVSS 3.1

Type: Primary
Base score: 8.1
Impact score: 5.9
Exploitability score: 2.2
Vector string: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: HIGH

Weaknesses

nvd@nist.gov: CWE-362
134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-364

Hype score: Not currently trending

Configurations

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Overview

Risk scores

CVSS 3.1

Weaknesses

Social media

Configurations

References