Juniper Networks Junos OS Multiple Local Privilege Escalation vulnerabilities in SUID binaries

Multiple local privilege escalation vulnerabilities in Juniper Networks Junos OS have been reported due to the setuid bit being enabled on multiple binaries. These binaries will run as the owner of the executable (typically “root”) and inherit their privileges. Hence these binary files can be used to escalate privileges to disclose sensitive information or execute arbitrary command as root.

This issue affects Juniper Networks Junos OS:

• all versions prior to 15.1R7-S9;
• 17.3 versions prior to 17.3R3-S11;
• 17.4 versions prior to 17.4R2-S12, 17.4R3-S3;
• 18.1 versions prior to 18.1R3-S11;
• 18.2 versions prior to 18.2R3-S6;
• 18.3 versions prior to 18.3R3-S4;
• 18.4 versions prior to 18.4R2-S7, 18.4R3-S6;
• 19.1 versions prior to 19.1R2-S2, 19.1R3-S4;
• 19.2 versions prior to 19.2R1-S6, 19.2R3-S1;
• 19.3 versions prior to 19.3R3-S1;
• 19.4 versions prior to 19.4R2-S2, 19.4R3-S1;
• 20.1 versions prior to 20.1R1-S4, 20.1R2;
• 20.2 versions prior to 20.2R2.

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue was discovered during a external security research.

CVE numbers CVE-2021-0223 and CVE-2021-0204

The following software releases have been updated to resolve these specific issues: Junos OS 15.1R7-S9*, 17.3R3-S11*, 17.4R2-S12, 17.4R3-S3, 18.1R3-S11, 18.2R3-S6, 18.3R3-S4, 18.4R2-S7, 18.4R3-S6, 19.1R2-S2, 19.1R3-S4, 19.2R1-S6, 19.2R3-S1, 19.3R3-S1, 19.4R2-S2, 19.4R3-S1, 20.1R1-S4, 20.1R2, 20.2R2, 20.3R1, and all subsequent releases.

This issue is being tracked as 1525318 and 1529210.