CVE-2024-47491

Summary

An Improper Handling of Exceptional Conditions vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a network-based, unauthenticated attacker to cause Denial of Service (DoS).

When a BGP UPDATE with malformed path attribute is received over an established BGP session, rpd crashes and restarts.

Continuous receipt of a BGP UPDATE with a specifically malformed path attribute will create a sustained Denial of Service (DoS) condition for impacted devices. While this issue affects systems running 32-bit and 64-bit systems, the probability of impact on 64-bit system is extremely low.  According to KB25803 https://supportportal.juniper.net/s/article/Junos-How-to-check-if-Junos-OS-is-64-or-32-bit-on-a-router , customers can confirm 32-bit or 64-bit system via the ' show version detail ' command:

     lab@router> show version detail| match 32      JUNOS 32-bit kernel Software Suite 

     lab@router> show version detail| match 64      JUNOS 64-bit kernel Software Suite 

This issue affects:

 Juniper Networks Junos OS: 

• All versions before 21.4R3-S8, 
• from 22.2 before 22.2R3-S4, 
• from 22.4 before 22.4R3-S3, 
• from 23.2 before 23.2R2-S1, 
• from 23.4 before 23.4R1-S2, 23.4R2.

 Juniper Networks Junos OS Evolved:  * All versions before 21.4R3-S8-EVO,

• from 22.2 before 22.2R3-S4-EVO,
• from 22.4 before 22.4R3-S3-EVO,
• from 23.2 before 23.2R2-S1-EVO,
• from 23.4 before 23.4R1-S2-EVO, 23.4R2-EVO.

Affected Software

Weaknesses

• CWE-755: CWE-755 Improper Handling of Exceptional Conditions

Workarounds

There are no known workarounds for this issue.

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://supportportal.juniper.net/

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