Juniper Junos OS Denial of Service Condition Vulnerability

Impact

• Denial of Service

System / Technologies affected

Juniper Networks Junos OS on EX Series and QFX Series

• 17.4R3 versions prior to 17.4R3-S3
• 18.1R3 versions between 18.1R3-S6 and 18.1R3-S11
• 18.2R3 versions prior to 18.2R3-S6
• 18.3R3 versions prior to 18.3R3-S4
• 18.4R2 versions prior to 18.4R2-S5
• 18.4R3 versions prior to 18.4R3-S6
• 19.1 versions between 19.1R2 and 19.1R3-S3
• 19.2 versions prior to 19.2R3-S1
• 19.3 versions prior to 19.3R2-S5, 19.3R3
• 19.4 versions prior to 19.4R2-S2, 19.4R3
• 20.1 versions prior to 20.1R2
• 20.2 versions prior to 20.2R1-S2, 20.2R2

Junos OS versions prior to 17.4R3 are unaffected by this vulnerability.

Solutions

Before installation of the software, please visit the vendor web-site for more details.

• Apply fixes issued by the vendor. For detail, please refer to the link below:
  https://kb.juniper.net/InfoCenter/index?page=content&id=JSA11107

Vulnerability Identifier

• CVE-2021-0217

Source

• Juniper Network
• AusCERT

Related Link

• https://kb.juniper.net/InfoCenter/index?page=content&id=JSA11107
• http://www.auscert.org.au/bulletins/ESB-2021.0203/