CVE-2021-0264

CVSS V2 Medium 5 CVSS V3 High 7.5
Description
A vulnerability in the processing of traffic matching a firewall filter containing a syslog action in Juniper Networks Junos OS on MX Series with MPC10/MPC11 cards installed, PTX10003 and PTX10008 Series devices, will cause the line card to crash and restart, creating a Denial of Service (DoS). Continued receipt and processing of packets matching the firewall filter can create a sustained Denial of Service (DoS) condition. When traffic hits the firewall filter, configured on lo0 or any physical interface on the line card, containing a term with a syslog action (e.g. 'term <name> then syslog'), the affected line card will crash and restart, impacting traffic processing through the ports of the line card. This issue only affects MX Series routers with MPC10 or MPC11 line cards, and PTX10003 or PTX10008 Series packet transport routers. No other platforms or models of line cards are affected by this issue. Note: This issue has also been identified and described in technical service bulletin TSB17931 (login required). This issue affects: Juniper Networks Junos OS on MX Series: 19.3 versions prior to 19.3R3-S2; 19.4 versions prior to 19.4R3-S2; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R2-S2, 20.2R3; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R2. Juniper Networks Junos OS Evolved on PTX10003, PTX10008: All versions prior to 20.4R2-EVO. This issue does not affect Juniper Networks Junos OS versions prior to 19.3R1.
Overview
  • CVE ID
  • CVE-2021-0264
  • Assigner
  • sirt@juniper.net
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-04-22T20:15:09
  • Last Modified Date
  • 2021-04-30T18:34:32
Weakness Enumerations
CWE URL
CWE-755 http://cwe.mitre.org/data/definitions/755.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:juniper:junos:19.3:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.3:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.3:r1-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.3:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.3:r2-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.3:r2-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.3:r2-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.3:r2-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.3:r2-s5:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.3:r3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.4:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.4:r1-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.4:r1-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.4:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.4:r2-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.4:r2-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.4:r3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.4:r3-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:20.1:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:20.1:r1-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:20.1:r1-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:20.1:r1-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:20.1:r1-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:20.1:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:20.1:r2-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:20.2:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:20.2:r1-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:20.2:r1-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:20.2:r1-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:20.2:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:20.2:r2-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:20.3:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:20.3:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:20.4:r1:*:*:*:*:*:* 1 OR
cpe:2.3:h:juniper:mx10:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:mx10000:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:mx10003:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:mx10008:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:mx10016:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:mx104:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:mx150:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:mx2008:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:mx2010:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:mx2020:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:mx204:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:mx240:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:mx40:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:mx480:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:mx5:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:mx80:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:mx960:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:juniper:junos_os_evolved:18.3:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos_os_evolved:19.1:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos_os_evolved:19.1:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos_os_evolved:19.2:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos_os_evolved:19.2:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos_os_evolved:19.3:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos_os_evolved:19.3:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos_os_evolved:20.1:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos_os_evolved:20.1:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos_os_evolved:20.2:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos_os_evolved:20.2:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos_os_evolved:20.3:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos_os_evolved:20.3:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos_os_evolved:20.4:r1:*:*:*:*:*:* 1 OR
cpe:2.3:h:juniper:ptx10003:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:juniper:ptx10008:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:N/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • 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:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 7.5
  • Base Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://kb.juniper.net/JSA11155 Vendor Advisory
https://kb.juniper.net/TSB17931 Permissions Required Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-0264
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0264
History
Created Old Value New Value Data Type Notes
2022-05-10 07:13:36 Added to TrackCVE
2022-12-06 02:21:55 2021-04-22T20:15Z 2021-04-22T20:15:09 CVE Published Date updated
2022-12-06 02:21:55 2021-04-30T18:34:32 CVE Modified Date updated
2022-12-06 02:21:55 Analyzed Vulnerability Status updated