Junos OS and Junos OS Evolved: Loading a malicious certificate from the CLI may result in a stack-based overflow

Summary

A Stack-Based Buffer Overflow vulnerability in Juniper Networks Junos OS and Juniper Networks Junos OS Evolved may allow a local, low-privileged attacker with access to the CLI the ability to load a malicious certificate file, leading to a limited Denial of Service (DoS) or privileged code execution. By exploiting the 'set security certificates' command with a crafted certificate file, a malicious attacker with access to the CLI could cause a crash of the command management daemon (mgd), limited to the local user's command interpreter, or potentially trigger a stack-based buffer overflow. This issue affects:  Junos OS: • All versions before 21.4R3-S7, • from 22.1 before 22.1R3-S6, • from 22.2 before 22.2R3-S4, • from 22.3 before 22.3R3-S3, • from 22.4 before 22.4R3-S2, • from 23.2 before 23.2R2, • from 23.4 before 23.4R1-S1, 23.4R2;  Junos OS Evolved: • All versions before 21.4R3-S7-EVO, • from 22.1-EVO before 22.1R3-S6-EVO, • from 22.2-EVO before 22.2R3-S4-EVO, • from 22.3-EVO before 22.3R3-S3-EVO, • from 22.4-EVO before 22.4R3-S2-EVO, • from 23.2-EVO before 23.2R2-EVO, • from 23.4-EVO before 23.4R1-S1-EVO, 23.4R2-EVO.

Timeline

1. Jul 10, 2024, 10:38 PM UTCCVE published
2. Jul 12, 2024, 12:00 AM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: total

3. Aug 2, 2024, 4:26 AM UTCRecord last updated

Affected versions

• Juniper Networks Junos OS

  fixed in 21.4R3-S7; From 22.1 · fixed in 22.1R3-S6; From 22.2 · fixed in 22.2R3-S4; From 22.3 · fixed in 22.3R3-S3; From 22.4 · fixed in 22.4R3-S2; From 23.2 · fixed in 23.2R2

• Juniper Networks Junos OS Evolved

  fixed in 21.4R3-S7-EVO; From 22.1-EVO · fixed in 22.1R3-S6-EVO; From 22.2-EVO · fixed in 22.2R3-S4-EVO; From 22.3-EVO · fixed in 22.3R3-S3-EVO; From 22.4-EVO · fixed in 22.4R3-S2-EVO; From 23.2-EVO · fixed in 23.2R2-EVO

References 1