Informazioni sul CVE-2022-22215

Junos OS and Junos OS Evolved: /var/run/<pid>.env files are potentially not deleted during termination of a gRPC connection causing inode exhaustion

CWE ID: N/A

Base Score (CVSS): N/A

CVE: CVE-2022-22215

Descrizione: A Missing Release of File Descriptor or Handle after Effective Lifetime vulnerability in plugable authentication module (PAM) of Juniper Networks Junos OS and Junos OS Evolved allows a locally authenticated attacker with low privileges to cause a Denial of Service (DoS). It is possible that after the termination of a gRPC connection the respective/var/run/.env file is not getting deleted which if occurring repeatedly can cause inode exhaustion. Inode exhaustion can present itself in two different ways: 1. The following log message can be observed: host kernel: pid (), uid inumber on /.mount/var: out of inodes which by itself is a clear indication. 2. The following log message can be observed: host []: … : No space left on device which is not deterministic and just a representation of a write error which could have several reasons. So the following check needs to be done: user@host> show system storage no-forwarding Filesystem Size Used Avail Capacity Mounted on /dev/ada1p1 475M 300M 137M 69% /.mount/var which indicates that the write error is not actually due to a lack of disk space. If either 1. or 2. has been confirmed, then the output of: user@host> file list /var/run/*.env | count need to be checked and if it indicates a high (>10000) number of files the system has been affected by this issue. This issue affects: Juniper Networks Junos OS All versions prior to 19.1R3-S8; 19.2 versions prior to 19.2R3-S6; 19.3 versions prior to 19.3R3-S5; 19.4 versions prior to 19.4R2-S6, 19.4R3-S7; 20.1 version 20.1R1 and later versions; 20.2 versions prior to 20.2R3-S5; 20.3 versions prior to 20.3R3-S4; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R3; 21.2 versions prior to 21.2R2. Juniper Networks Junos OS Evolved All versions prior to 20.4R3-EVO; 21.1 versions prior to 21.1R3-S1-EVO; 21.2 versions prior to 21.2R1-S1-EVO, 21.2R2-EVO.

Vettore di attacco CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Punteggio CVSS

Il CVSS è un sistema di valutazione che misura la gravità di una vulnerabilità informatica considerando fattori come l’impatto potenziale, la probabilità di attacco e la facilità di esecuzione.

Punteggio Base (calcolato da AziendaSicura): 6.4 (Medium)

Riassunto: Accesso: Network, Privilegi: Low, Interazione utente: None, Confidenzialità: None, Integrità: None, Disponibilità: High.

Dettaglio del Vettore

Metrica Valore Significato Descrizione
Attack Vector (AV) N Network L’attacco può essere eseguito da remoto attraverso la rete.
Attack Complexity (AC) L Low L’attacco non richiede condizioni particolari.
Privileges Required (PR) L Low Richiede pochi privilegi.
User Interaction (UI) N None Non è richiesta interazione dell’utente.
Scope (S) U Unchanged Il raggio d’azione non cambia.
Confidentiality Impact (C) N None Nessun impatto sulla riservatezza.
Integrity Impact (I) N None Nessun impatto sull’integrità.
Availability Impact (A) H High Rende il sistema inutilizzabile.

Riferimenti esterni

Prodotti interessati

  • Juniper Networks – Junos OS
  • Juniper Networks – Junos OS Evolved

Relazioni con altri prodotti

Produttore:Juniper Networks
Prodotto: Junos OS
Anno: 2022
CWE:
CVSS: 0.0

Produttore:Juniper Networks
Prodotto: Junos OS Evolved
Anno: 2022
CWE:
CVSS: 0.0

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