Vulnerability CVE-2020-1667 - CERT Civis.Net

Vulnerability Name:

CVE-2020-1667 (CCN-189905)

Assigned:

2019-11-04

Published:

2020-10-14

Updated:

2020-10-27

Summary:

When DNS filtering is enabled on Juniper Networks Junos MX Series with one of the following cards MS-PIC, MS-MIC or MS-MPC, an incoming stream of packets processed by the Multiservices PIC Management Daemon (mspmand) process might be bypassed due to a race condition. Due to this vulnerability, mspmand process, responsible for managing "URL Filtering service", can crash, causing the Services PIC to restart. While the Services PIC is restarting, all PIC services including DNS filtering service (DNS sink holing) will be bypassed until the Services PIC completes its boot process. This issue affects Juniper Networks Junos OS: 17.3 versions prior to 17.3R3-S8; 18.3 versions prior to 18.3R3-S1; 18.4 versions prior to 18.4R3; 19.1 versions prior to 19.1R3; 19.2 versions prior to 19.2R2; 19.3 versions prior to 19.3R3. This issue does not affect Juniper Networks Junos OS 17.4, 18.1, and 18.2.

CVSS v3 Severity:

8.3 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L)
7.2 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/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): Changed
Impact Metrics:	Confidentiality (C): Low Integrity (I): Low Availibility (A): Low

8.3 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L)
7.2 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/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): Changed
Impact Metrics:	Confidentiality (C): Low Integrity (I): Low Availibility (A): Low

CVSS v2 Severity:

4.0 Medium (CVSS v2 Vector: AV:N/AC:H/Au:N/C:N/I:P/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): High Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): Partial Availibility (A): Partial

7.5 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): Partial Availibility (A): Partial

Vulnerability Type:

Vulnerability Consequences:

Bypass Security

References:

Source: MITRE
Type: CNA
CVE-2020-1667

Source: XF
Type: UNKNOWN
juniper-cve20201667-sec-bypass(189905)

Source: MISC
Type: Vendor Advisory
https://kb.juniper.net/

Source: MISC
Type: Vendor Advisory
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA11064&cat=MX_SERIES&actp=LIST

Source: CCN
Type: Juniper Networks Security Bulletin JSA11064
Junos OS: MX Series: Services card might restart due to a race condition when DNS filtering is enabled. (CVE-2020-1667)

Vulnerable Configuration:

Configuration 1:

cpe:/o:juniper:junos:17.3:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:17.3:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:17.3:r2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:17.3:r2-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:17.3:r2-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:17.3:r2-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:17.3:r2-s4:*:*:*:*:*:*

OR cpe:/o:juniper:junos:17.3:r2-s5:*:*:*:*:*:*

OR cpe:/o:juniper:junos:17.3:r3:-:*:*:*:*:*

OR cpe:/o:juniper:junos:17.3:r3-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:17.3:r3-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:17.3:r3-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r1-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:17.3:r3-s4:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r1-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r1-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r1-s5:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r1-s5:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r2-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r2-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r2-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r2-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r1-s6:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r2-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:17.3:r3-s7:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r1-s6:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r2-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:r1-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:r1-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:r1-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:r1-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:r2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:r2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:r2-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:r2-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:r1-s4:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r2-s4:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:r2-s1:*:*:*:*:*:*

Configuration CCN 1:

cpe:/o:juniper:junos:17.3:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:12.3:-:*:*:*:*:*:*

Denotes that component is vulnerable