CVE-2021-31356: falha de alta gravidade em Juniper Networks Junos OS Evolved
Junos OS Evolved: Multiple shell-injection vulnerabilities in EVO UI wrapper scripts
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21Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 7.8epss 0.9%
A command injection vulnerability in command processing on Juniper Networks Junos OS Evolved allows an attacker with authenticated CLI access to be able to bypass configured access protections to execute arbitrary shell commands within the context of the current user. The vulnerability allows an attacker to bypass command authorization restrictions assigned to their specific user account and execute commands that are available to the privilege level for which the user is assigned. For example, a user that is in the super-user login class, but restricted to executing specific CLI commands could exploit the vulnerability to execute any other command available to an unrestricted admin user. This vulnerability does not increase the privilege level of the user, but rather bypasses any CLI command restrictions by allowing full access to the shell. This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R3-S1-EVO; All versions of 21.1-EVO and 21.2-EVO.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Produtos afetados
Juniper Networks · Junos OS EvolvedCVEs relacionadas — Juniper Networks Junos OS Evolved
No mesmo produto, das mais perigosas para as menos.
CVE-2026-21902CRITICALJunos OS Evolved: PTX Series: A vulnerability allows a unauthenticated, network-based attacker to execute code as rootEPSS 18.5%CVE-2026-101967CRITICALJunos OS Evolved: PTX Series: An attacker controlled DHCP response causes root-level compromise when zero-touch provisioning is usedEPSS 3.9%CVE-2026-101978HIGHJunos OS Evolved: PTX Series: An attacker controlled gRPC response causes root-level compromise when zero-touch provisioning is usedEPSS 3.9%CVE-2026-102059HIGHJunos OS and Junos OS Evolved: EX Series, SRX Series, QFX Series: A rogue DHCP server causes root-level command execution when the phone-home client processes specific informationEPSS 3.9%CVE-2026-102031CRITICALJunos OS Evolved: A low-privileged TACACS+ user causes root command execution when authorization refresh is enabledEPSS 2.1%CVE-2023-28983HIGHJunos OS Evolved: Shell Injection vulnerability in the gNOI serverEPSS 1.5%
Referências
https://kb.juniper.net/JSA11221