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CVE-2021-0223

Junos OS: telnetd.real Local Privilege Escalation vulnerabilities in SUID binaries

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 15.1R7-S9, 17.3R3-S11, 18.1R3-S11, 18.2R3-S6, 19.3R3-S1, and 1 more
None on Exploit-DB, Metasploit or GitHub

Summary

A local privilege escalation vulnerability in telnetd.real of Juniper Networks Junos OS may allow a locally authenticated shell user to escalate privileges and execute arbitrary commands as root. telnetd.real is shipped with setuid permissions enabled and is owned by the root user, allowing local users to run telnetd.real with root privileges. 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 18.3R2-S4, 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; 20.1 versions prior to 20.1R1-S4, 20.1R2; 20.2 versions prior to 20.2R2.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Juniper Networks Junos OS

    fixed in 15.1R7-S9; From 17.3 · fixed in 17.3R3-S11; From 18.1 · fixed in 18.1R3-S11; From 18.2 · fixed in 18.2R3-S6; From 19.3 · fixed in 19.3R3-S1; From 20.2 · fixed in 20.2R2

References 1

kb.juniper.net