CVE-2024-21611: Junos OS and Junos OS Evolved: In a jflow scenario continuous route churn will cause a memory leak and eventually an rpd crash
First published: Fri Jan 12 2024(Updated: )
A Missing Release of Memory after Effective Lifetime vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). In a Juniper Flow Monitoring (jflow) scenario route churn that causes BGP next hops to be updated will cause a slow memory leak and eventually a crash and restart of rpd. Thread level memory utilization for the areas where the leak occurs can be checked using the below command: user@host> show task memory detail | match so_in so_in6 28 32 344450 11022400 344760 11032320 so_in 8 16 1841629 29466064 1841734 29467744 This issue affects: Junos OS * 21.4 versions earlier than 21.4R3; * 22.1 versions earlier than 22.1R3; * 22.2 versions earlier than 22.2R3. Junos OS Evolved * 21.4-EVO versions earlier than 21.4R3-EVO; * 22.1-EVO versions earlier than 22.1R3-EVO; * 22.2-EVO versions earlier than 22.2R3-EVO. This issue does not affect: Juniper Networks Junos OS versions earlier than 21.4R1. Juniper Networks Junos OS Evolved versions earlier than 21.4R1.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Juniper JUNOS | =21.4 | |
| Juniper JUNOS | =21.4-r1 | |
| Juniper JUNOS | =21.4-r1-s1 | |
| Juniper JUNOS | =21.4-r1-s2 | |
| Juniper JUNOS | =21.4-r2 | |
| Juniper JUNOS | =21.4-r2-s1 | |
| Juniper JUNOS | =21.4-r2-s2 | |
| Juniper JUNOS | =22.1 | |
| Juniper JUNOS | =22.1-r1 | |
| Juniper JUNOS | =22.1-r1-s1 | |
| Juniper JUNOS | =22.1-r1-s2 | |
| Juniper JUNOS | =22.1-r2 | |
| Juniper JUNOS | =22.1-r2-s1 | |
| Juniper JUNOS | =22.1-r2-s2 | |
| Juniper JUNOS | =22.2 | |
| Juniper JUNOS | =22.2-r1 | |
| Juniper JUNOS | =22.2-r1-s1 | |
| Juniper JUNOS | =22.2-r1-s2 | |
| Juniper JUNOS | =22.2-r2 | |
| Juniper JUNOS | =22.2-r2-s1 | |
| Juniper JUNOS | =22.2-r2-s2 | |
| Juniper Networks Junos OS Evolved | =21.4 | |
| Juniper Networks Junos OS Evolved | =21.4-r1 | |
| Juniper Networks Junos OS Evolved | =21.4-r1-s1 | |
| Juniper Networks Junos OS Evolved | =21.4-r1-s2 | |
| Juniper Networks Junos OS Evolved | =21.4-r2 | |
| Juniper Networks Junos OS Evolved | =21.4-r2-s1 | |
| Juniper Networks Junos OS Evolved | =21.4-r2-s2 | |
| Juniper Networks Junos OS Evolved | =22.1 | |
| Juniper Networks Junos OS Evolved | =22.1-r1 | |
| Juniper Networks Junos OS Evolved | =22.1-r1-s1 | |
| Juniper Networks Junos OS Evolved | =22.1-r1-s2 | |
| Juniper Networks Junos OS Evolved | =22.1-r2 | |
| Juniper Networks Junos OS Evolved | =22.1-r2-s1 | |
| Juniper Networks Junos OS Evolved | =22.2 | |
| Juniper Networks Junos OS Evolved | =22.2-r1 | |
| Juniper Networks Junos OS Evolved | =22.2-r1-s1 | |
| Juniper Networks Junos OS Evolved | =22.2-r2 | |
| Juniper Networks Junos OS Evolved | =22.2-r2-s1 | |
| Juniper Networks Junos OS Evolved | =22.2-r2-s2 |
Remedy
The following software releases have been updated to resolve this specific issue: Junos OS: 21.4R3, 22.1R3, 22.2R3, 22.3R1, and all subsequent releases. Junos OS Evolved: 21.4R3-EVO, 22.1R3-EVO, 22.2R3-EVO, 22.3R1-EVO, and all subsequent releases.
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-21611?
CVE-2024-21611 has a high severity rating due to its potential to cause a Denial of Service.
How do I fix CVE-2024-21611?
To fix CVE-2024-21611, upgrade Junos OS or Junos OS Evolved to a patched version.
Who is affected by CVE-2024-21611?
CVE-2024-21611 affects users of Junos OS and Junos OS Evolved versions 21.4 and 22.1 and their related releases.
What type of vulnerability is CVE-2024-21611?
CVE-2024-21611 is a Missing Release of Memory after Effective Lifetime vulnerability.
Can CVE-2024-21611 be exploited over the network?
Yes, CVE-2024-21611 can be exploited by an unauthenticated, network-based attacker.
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