CVE-2024-47491: Junos OS and Junos OS Evolved: Receipt of a specific malformed BGP path attribute leads to an RPD crash
First published: Fri Oct 11 2024(Updated: )
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.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Juniper Junos | <21.4R3-S8>=undefined>=undefined>=undefined>=undefined>=23.4R2<23.5 | |
| Juniper Networks Junos OS | <21.4R3-S8-EVO>=undefined>=undefined>=undefined>=undefined>=23.4R2-EVO<23.5-EVO |
Remedy
The following software releases have been updated to resolve this specific issue: Junos OS: 21.4R3-S8, 22.2R3-S4, 22.4R3-S3, 23.2R2-S1, 23.4R1-S2, 23.4R2, 24.2R1, and all subsequent releases. Junos OS Evolved: 21.4R3-S8-EVO, 22.2R3-S4-EVO, 22.4R3-S3-EVO, 23.2R2-S1-EVO, 23.4R1-S2-EVO, 23.4R2-EVO, 24.2R1-EVO, and all subsequent releases.
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-47491?
CVE-2024-47491 has been classified as a critical vulnerability due to its potential to cause Denial of Service.
How do I fix CVE-2024-47491?
To mitigate CVE-2024-47491, users should upgrade their Junos OS or Junos OS Evolved to the latest version that addresses this issue.
What types of systems are affected by CVE-2024-47491?
CVE-2024-47491 affects Juniper Networks Junos OS and Junos OS Evolved versions up to 21.4R3-S8 and specific versions in the 23.x series.
Can CVE-2024-47491 be exploited remotely?
Yes, CVE-2024-47491 can be exploited remotely by unauthenticated attackers via a malformed BGP UPDATE message.
What impact does CVE-2024-47491 have on network performance?
CVE-2024-47491 can lead to a Denial of Service, severely impacting network performance and availability.
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