Vulnerability Name:

CVE-2019-0041 (CCN-159423)

Assigned:2018-10-11
Published:2019-04-10
Updated:2020-09-29
Summary:On EX4300-MP Series devices with any lo0 filters applied, transit network traffic may reach the control plane via loopback interface (lo0). The device may fail to forward such traffic. This issue affects Juniper Networks Junos OS 18.2 versions prior to 18.2R1-S2, 18.2R2 on EX4300-MP Series. This issue does not affect any other EX series devices.
CVSS v3 Severity:8.6 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
7.5 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): Low
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
6.4 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): Partial
Vulnerability Type:CWE-noinfo
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2019-0041

Source: XF
Type: UNKNOWN
juniper-cve20190041-dos(159423)

Source: CCN
Type: Juniper Networks Security Bulletin JSA10933
Junos OS: EX4300-MP Series: IP transit traffic can reach the control plane via loopback interface. (CVE-2019-0041)

Source: CONFIRM
Type: Mitigation, Vendor Advisory
https://kb.juniper.net/JSA10933

Vulnerable Configuration:Configuration 1:
  • cpe:/o:juniper:junos:18.2:-:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.2:r1:*:*:*:*:*:*
  • AND
  • cpe:/h:juniper:ex4300-mp:-:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:juniper:junos:18.2:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    juniper junos 18.2 -
    juniper junos 18.2 r1
    juniper ex4300-mp -
    juniper junos 18.2