Vulnerability Name:

CVE-2020-1627 (CCN-179301)

Assigned:2019-11-04
Published:2020-04-08
Updated:2021-07-21
Summary:A vulnerability in Juniper Networks Junos OS on vMX and MX150 devices may allow an attacker to cause a Denial of Service (DoS) by sending specific packets requiring special processing in microcode that the flow cache can't handle, causing the riot forwarding daemon to crash. By continuously sending the same specific packets, an attacker can repeatedly crash the riot process causing a sustained Denial of Service. Flow cache is specific to vMX based products and the MX150, and is enabled by default in performance mode. This issue can only be triggered by traffic destined to the device. Transit traffic will not cause the riot daemon to crash. When the issue occurs, a core dump and riot log file entry are generated. For example: /var/crash/core.J-UKERN.mpc0.1557255993.3864.gz /home/pfe/RIOT logs: fpc0 riot[1888]: PANIC in lu_reorder_send_packet_postproc(): fpc0 riot[6655]: PANIC in lu_reorder_send_packet_postproc(): This issue affects Juniper Networks Junos OS: 18.1 versions prior to 18.1R3 on vMX and MX150; 18.2 versions prior to 18.2R3 on vMX and MX150; 18.2X75 versions prior to 18.2X75-D60 on vMX and MX150; 18.3 versions prior to 18.3R3 on vMX and MX150; 18.4 versions prior to 18.4R2 on vMX and MX150; 19.1 versions prior to 19.1R2 on vMX and MX150. This issue does not affect Junos OS versions prior to 18.1R1.
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: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
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-20
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2020-1627

Source: XF
Type: UNKNOWN
juniper-cve20201627-dos(179301)

Source: CCN
Type: Juniper Networks Security Bulletin JSA11006
Junos OS: vMX and MX150: Denial of Service vulnerability in packet processing (CVE-2020-1627)

Source: CONFIRM
Type: Vendor Advisory
https://kb.juniper.net/JSA11006

Vulnerable Configuration:Configuration 1:
  • cpe:/o:juniper:junos:18.1:-:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.1:r2:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.1:r2-s1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.1:r2-s2:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.1:r2-s4:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.2:-:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.2:r1:-:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.2:r1-s3:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.2:r1-s5:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.2:r2-s1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.2:r2-s2:*:*:*:*:*:*
  • 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:18.2x75:-:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.2x75:d20:*:*:*:*:*:*
  • 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:18.3:r1-s3:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.2:r2-s3:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.2:r2-s4:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.4:r1-s2:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.2x75:d40:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.2:r2-s5:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.2:r2-s6:*:*:*:*:*:*
  • 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:18.2x75:d30:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.1:r1:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.1:-:*:*:*:*:*:*
  • 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:*:*:*:*:*:*
  • AND
  • cpe:/a:juniper:vmx:-:*:*:*:*:*:*:*
  • OR cpe:/h:juniper:mx150:-:*:*:*:*:*:*:*

  • Configuration CCN 1:
  • cpe:/a:juniper:junos:18.1:-:*:*:*:*:*:*
  • OR cpe:/a:juniper:junos:18.2:*:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.2x75:*:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.3:-:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:18.4:-:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:19.1:-:*:*:*:*:*:*

  • * Denotes that component is vulnerable
    BACK
    juniper junos 18.1 -
    juniper junos 18.1 r2
    juniper junos 18.1 r2-s1
    juniper junos 18.1 r2-s2
    juniper junos 18.1 r2-s4
    juniper junos 18.2 -
    juniper junos 18.2 r1
    juniper junos 18.2 r1-s3
    juniper junos 18.2 r1-s5
    juniper junos 18.2 r2-s1
    juniper junos 18.2 r2-s2
    juniper junos 18.3 r1-s1
    juniper junos 18.3 r2
    juniper junos 18.3 r1
    juniper junos 18.4 r1
    juniper junos 18.2x75 -
    juniper junos 18.2x75 d20
    juniper junos 18.3 r1-s2
    juniper junos 18.3 -
    juniper junos 18.4 -
    juniper junos 18.4 r1-s1
    juniper junos 18.3 r1-s3
    juniper junos 18.2 r2-s3
    juniper junos 18.2 r2-s4
    juniper junos 18.4 r1-s2
    juniper junos 18.2x75 d40
    juniper junos 18.2 r2-s5
    juniper junos 18.2 r2-s6
    juniper junos 18.4 r1-s5
    juniper junos 18.3 r1-s5
    juniper junos 18.3 r2-s1
    juniper junos 18.3 r2-s2
    juniper junos 18.2x75 d30
    juniper junos 19.1 r1
    juniper junos 19.1 -
    juniper junos 19.1 r1-s1
    juniper junos 19.1 r1-s3
    juniper junos 19.1 r1-s2
    juniper vmx -
    juniper mx150 -
    juniper junos 18.1 -
    juniper junos 18.2
    juniper junos 18.2x75
    juniper junos 18.3 -
    juniper junos 18.4 -
    juniper junos 19.1 -