Vulnerability Name:

CVE-2020-1686 (CCN-189882)

Assigned:2019-11-04
Published:2020-10-14
Updated:2022-10-19
Summary:On Juniper Networks Junos OS devices, receipt of a malformed IPv6 packet may cause the system to crash and restart (vmcore). This issue can be trigged by a malformed IPv6 packet destined to the Routing Engine. An attacker can repeatedly send the offending packet resulting in an extended Denial of Service condition. Only IPv6 packets can trigger this issue. IPv4 packets cannot trigger this issue. This issue affects Juniper Networks Junos OS 18.4 versions prior to 18.4R2-S4, 18.4R3-S1; 19.1 versions prior to 19.1R2-S1, 19.1R3; 19.2 versions prior to 19.2R1-S5, 19.2R2; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2. This issue does not affect Juniper Networks Junos OS prior to 18.4R1.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:7.8 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-noinfo
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2020-1686

Source: XF
Type: UNKNOWN
juniper-cve20201686-dos(189882)

Source: CCN
Type: Juniper Networks Security Bulletin JSA11083
Junos OS: Kernel crash (vmcore) upon receipt of a malformed IPv6 packet. (CVE-2020-1686)

Source: CONFIRM
Type: Vendor Advisory
https://kb.juniper.net/JSA11083

Vulnerable Configuration:Configuration 1:
  • cpe:/o:juniper:junos:18.4:r1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.4:-:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.4:r1-s1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.4:r1-s2:*:*:*:*:*:*
  • 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:18.4:r2:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.1:r1-s1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.4:r1-s5:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.4:r2-s1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.4:r2-s2:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.1:r1-s2:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.1:r1-s3:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.2:-:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.2:r1-s1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.2:r1-s2:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.2:r1-s3:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.3:-:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.3:r1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.4:r1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.4:r2-s3:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.4:r3:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.1:r2:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.3:r1-s1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.3:r2:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.3:r2-s1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.4:r1-s6:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.1:r1-s4:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.2:r1-s4:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.3:r2-s2:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.3:r2-s3:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.4:r1-s1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.4:r1-s2:*:*:*:*:*:*

    • Configuration CCN 1:
  • 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:19.3:-:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.4:r1:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    juniper junos 18.4 r1
    juniper junos 18.4 -
    juniper junos 18.4 r1-s1
    juniper junos 18.4 r1-s2
    juniper junos 19.1 r1
    juniper junos 19.1 -
    juniper junos 19.2 r1
    juniper junos 18.4 r2
    juniper junos 19.1 r1-s1
    juniper junos 18.4 r1-s5
    juniper junos 18.4 r2-s1
    juniper junos 18.4 r2-s2
    juniper junos 19.1 r1-s2
    juniper junos 19.1 r1-s3
    juniper junos 19.2 -
    juniper junos 19.2 r1-s1
    juniper junos 19.2 r1-s2
    juniper junos 19.2 r1-s3
    juniper junos 19.3 -
    juniper junos 19.3 r1
    juniper junos 19.4 r1
    juniper junos 18.4 r2-s3
    juniper junos 18.4 r3
    juniper junos 19.1 r2
    juniper junos 19.3 r1-s1
    juniper junos 19.3 r2
    juniper junos 19.3 r2-s1
    juniper junos 18.4 r1-s6
    juniper junos 19.1 r1-s4
    juniper junos 19.2 r1-s4
    juniper junos 19.3 r2-s2
    juniper junos 19.3 r2-s3
    juniper junos 19.4 r1-s1
    juniper junos 19.4 r1-s2
    juniper junos 18.4 -
    juniper junos 19.1 -
    juniper junos 19.2 -
    juniper junos 19.3 -
    juniper junos 19.4 r1