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ID de Prueba:1.3.6.1.4.1.25623.1.1.10.2022.0436
Categoría:Mageia Linux Local Security Checks
Título:Mageia: Security Advisory (MGASA-2022-0436)
Resumen:The remote host is missing an update for the 'dropbear' package(s) announced via the MGASA-2022-0436 advisory.
Descripción:Summary:
The remote host is missing an update for the 'dropbear' package(s) announced via the MGASA-2022-0436 advisory.

Vulnerability Insight:
Updated dropbear package fixes a security vulnerability in dbclient:.
Due to a non-RFC-compliant check of the available authentication methods
in the client-side SSH code, it is possible for an SSH server to change
the login process in its favor. This attack can bypass additional security
measures such as FIDO2 tokens or SSH-Askpass. Thus, it allows an attacker
to abuse a forwarded agent for logging on to another server unnoticed.

The fix adds a new option, DisableTrivialAuth, to dbclient to disable this
attack vector. Invoke dbclient as
'dbclient -o DisableTrivialAuth=yes localhost ...' to enable this mitigation
on each dbclient invocation.

Affected Software/OS:
'dropbear' package(s) on Mageia 8.

Solution:
Please install the updated package(s).

CVSS Score:
7.8

CVSS Vector:
AV:N/AC:L/Au:N/C:N/I:C/A:N

Referencia Cruzada: Common Vulnerability Exposure (CVE) ID: CVE-2021-36369
https://github.com/mkj/dropbear/pull/128
https://github.com/mkj/dropbear/releases
https://github.com/mkj/dropbear/releases/tag/DROPBEAR_2022.82
https://lists.debian.org/debian-lts-announce/2022/11/msg00015.html
CopyrightCopyright (C) 2022 Greenbone AG

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