CVE-2020-1685

CVSS V2 Medium 5 CVSS V3 Medium 5.8
Description
When configuring stateless firewall filters in Juniper Networks EX4600 and QFX 5000 Series devices using Virtual Extensible LAN protocol (VXLAN), the discard action will fail to discard traffic under certain conditions. Given a firewall filter configuration similar to: family ethernet-switching { filter L2-VLAN { term ALLOW { from { user-vlan-id 100; } then { accept; } } term NON-MATCH { then { discard; } } when there is only one term containing a 'user-vlan-id' match condition, and no other terms in the firewall filter except discard, the discard action for non-matching traffic will only discard traffic with the same VLAN ID specified under 'user-vlan-id'. Other traffic (e.g. VLAN ID 200) will not be discarded. This unexpected behavior can lead to unintended traffic passing through the interface where the firewall filter is applied. This issue only affects systems using VXLANs. This issue affects Juniper Networks Junos OS on QFX5K Series: 18.1 versions prior to 18.1R3-S7, except 18.1R3; 18.2 versions prior to 18.2R2-S7, 18.2R3-S1; 18.3 versions prior to 18.3R1-S5, 18.3R2-S4, 18.3R3; 18.4 versions prior to 18.4R1-S7, 18.4R2-S1, 18.4R3; 19.1 versions prior to 19.1R1-S5, 19.1R2; 19.2 versions prior to 19.2R1-S5, 19.2R2.
Overview
  • CVE ID
  • CVE-2020-1685
  • Assigner
  • sirt@juniper.net
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2020-10-16T21:15:14
  • Last Modified Date
  • 2021-02-05T16:49:04
Weakness Enumerations
CWE URL
CWE-203 http://cwe.mitre.org/data/definitions/203.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:juniper:junos:18.1:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r2-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r2-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r2-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r3-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r3-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r3-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r3-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r3-s6:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r1:-:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r1-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r1-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r1-s5:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r2-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r2-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r2-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r2-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r2-s5:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r2-s6:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r1-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r1-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r1-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r1-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r2-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r2-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r2-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r1-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r1-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r1-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r1-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r1-s5:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r1-s6:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.1:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.1:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.1:r1-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.1:r1-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.1:r1-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.1:r1-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.2:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.2:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.2:r1-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.2:r1-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.2:r1-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.2:r1-s4:*:*:*:*:*:* 1 OR
cpe:2.3:h:juniper:qfx5100:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:qfx5110:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:qfx5120:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:qfx5130:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:qfx5200:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:qfx5210:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:qfx5220:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:P/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • Base Score
  • 5
  • Severity
  • MEDIUM
  • Exploitability Score
  • 10
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • CHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • NONE
  • Base Score
  • 5.8
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 3.9
  • Impact Score
  • 1.4
References
Reference URL Reference Tags
https://kb.juniper.net/JSA11082 Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2020-1685
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-1685
History
Created Old Value New Value Data Type Notes
2022-05-10 07:24:16 Added to TrackCVE
2022-12-05 00:17:08 2020-10-16T21:15Z 2020-10-16T21:15:14 CVE Published Date updated
2022-12-05 00:17:08 2021-02-05T16:49:04 CVE Modified Date updated
2022-12-05 00:17:08 Analyzed Vulnerability Status updated