Junos OS and Junos OS Evolved: Stack overflow vulnerability in CLI command processing

A Stack-based Buffer Overflow vulnerability in the CLI command of Juniper Networks Junos and Junos EVO allows a low privileged attacker to execute a specific CLI commands leading to Denial of Service.

Repeated actions by the attacker will create a sustained Denial of Service (DoS) condition.

This issue affects Juniper Networks:

Junos OS:

• All versions prior to 19.1R3-S10;
• 19.2 versions prior to 19.2R3-S7;
• 19.3 versions prior to 19.3R3-S8;
• 19.4 versions prior to 19.4R3-S12;
• 20.2 versions prior to 20.2R3-S8;
• 20.4 versions prior to 20.4R3-S8;
• 21.2 versions prior to 21.2R3-S6;
• 21.3 versions prior to 21.3R3-S5;
• 21.4 versions prior to 21.4R3-S4;
• 22.1 versions prior to 22.1R3-S3;
• 22.2 versions prior to 22.2R3-S1;
• 22.3 versions prior to 22.3R3;
• 22.4 versions prior to 22.4R2.

Junos OS Evolved:

• All versions prior to 20.4R3-S8-EVO;
• 21.2 versions prior to 21.2R3-S6-EVO;
• 21.3 versions prior to 21.3R3-S5-EVO;
• 21.4 versions prior to 21.4R3-S4-EVO;
• 22.1 versions prior to 22.1R3-S3-EVO;
• 22.2 versions prior to 22.2R3-S1-EVO;
• 22.3 versions prior to 22.3R3-EVO;
• 22.4 versions prior to 22.4R2-EVO.