CVEvulnerability

CVE-2015-5600

8.1 HIGH Published 2015-08-03 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2015-08-03
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
8.1 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
8.5 HIGH — AV:N/AC:L/Au:N/C:P/I:N/A:C
Weaknesses
CWE-264, CWE-400

Description

The kbdint_next_device function in auth2-chall.c in sshd in OpenSSH through 6.9 does not properly restrict the processing of keyboard-interactive devices within a single connection, which makes it easier for remote attackers to conduct brute-force attacks or cause a denial of service (CPU consumption) via a long and duplicative list in the ssh -oKbdInteractiveDevices option, as demonstrated by a modified client that provides a different password for each pam element on this list.

Affected configurations

• openbsd openssh (<= 6.9)

Related

Weakness · not in database (1)

Weakness · CWE (1)

  • CWE-400 Uncontrolled Resource Consumption weakness

References