Descripción original
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.
Software afectado
- OpenSSH ≤ 6.9 coincidencia exacta
Detalles
- Publicación
- 2015-08-03
- Última modificación
- 2026-06-17
- Vector CVSS
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H- CWE
- CWE-264, CWE-400
Referencias
- cve.org/CVE-2015-5600
- nvd.nist.gov/vuln/detail/CVE-2015-5600
- cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c
- cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c.diff?r1=1.42&r2=1.43&f=h
- kb.juniper.net/InfoCenter/index?page=content&id=JSA10697
- lists.apple.com/archives/security-announce/2015/Aug/msg00001.html
- lists.fedoraproject.org/pipermail/package-announce/2015-August/165170.html
- lists.fedoraproject.org/pipermail/package-announce/2015-July/162955.html
- lists.opensuse.org/opensuse-security-announce/2015-09/msg00017.html
- openwall.com/lists/oss-security/2015/07/23/4
- rhn.redhat.com/errata/RHSA-2016-0466.html
- seclists.org/fulldisclosure/2015/Jul/92
- www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
- www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
Controla estas versiones en tus propios servidores
InfraGuard recopila las versiones de software instaladas en cada servidor y señala las que tienen vulnerabilidades conocidas. Autoalojado: nada sale de tu red.
Este producto utiliza datos de la API del NVD, pero no está avalado ni certificado por el NVD. CVE® es una marca registrada de The MITRE Corporation; los registros CVE se utilizan conforme a los Términos de uso del CVE Program.