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CVE-2019-0048

Vulnérabilité non évaluée dans Junos OS (Juniper Networks)

CVSS 0.0 · Non évaluée
EPSS 1.0%
Juniper Networks•Junos OS•Versions : 17.3 versions prior to 17.3R3-S3 on EX4300 Series, 17.1 versions prior to 17.1R3 on EX4300 Series, 18.1 versions prior to 18.1R3-S1 on EX4300 Series, 17.2 versions prior to 17.2R3-S2 on EX4300 Series, 18.2 versions prior to 18.2R2 on EX4300 Series, 17.4 versions prior to 17.4R2-S5 and 17.4R3 on EX4300 Series, 18.3 versions prior to 18.3R2 on EX4300 Series, 14.1X53 versions prior to 14.1X53-D51 and 14.1X53-D115 on EX4300 Series

Description

On EX4300 Series switches with TCAM optimization enabled, incoming multicast traffic matches an implicit loopback filter rule first, since it has high priority. This rule is meant for reserved multicast addresses 224.0.0.x, but incorrectly matches on 224.x.x.x. Due to this bug, when a firewall filter is applied on the loopback interface, other firewall filters might stop working for multicast traffic. The command 'show firewall filter' can be used to confirm whether the filter is working. This issue only affects the EX4300 switch. No other products or platforms are affected by this vulnerability. This issue affects: Juniper Networks Junos OS: 14.1X53 versions prior to 14.1X53-D51, 14.1X53-D115 on EX4300 Series; 17.1 versions prior to 17.1R3 on EX4300 Series; 17.2 versions prior to 17.2R3-S2 on EX4300 Series; 17.3 versions prior to 17.3R3-S3 on EX4300 Series; 17.4 versions prior to 17.4R2-S5, 17.4R3 on EX4300 Series; 18.1 versions prior to 18.1R3-S1 on EX4300 Series; 18.2 versions prior to 18.2R2 on EX4300 Series; 18.3 versions prior to 18.3R2 on EX4300 Series.

Gravité et risque d'exploitation

CVE-2019-0048 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.97 %, ce qui la place devant 61.1 % des CVE référencées.

Que faire ?

  • Vérifiez si Junos OS (versions 17.3 versions prior to 17.3R3-S3 on EX4300 Series, 17.1 versions prior to 17.1R3 on EX4300 Series, 18.1 versions prior to 18.1R3-S1 on EX4300 Series, 17.2 versions prior to 17.2R3-S2 on EX4300 Series, 18.2 versions prior to 18.2R2 on EX4300 Series, 17.4 versions prior to 17.4R2-S5 and 17.4R3 on EX4300 Series, 18.3 versions prior to 18.3R2 on EX4300 Series, 14.1X53 versions prior to 14.1X53-D51 and 14.1X53-D115 on EX4300 Series) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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