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
Quick assessment
Affected
Juniper Networks Junos OS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Juniper Networks Junos OS和Juniper Networks Junos OS Evolved都是美国瞻博网络（Juniper Networks）公司的产品。Juniper Networks Junos OS是一套专用于该公司的硬件设备的网络操作系统。该操作系统提供了安全编程接口和Junos SDK。Juniper Networks Junos OS Evolved是Junos OS 的升级版系统。 Juniper Networks Junos OS 和 Junos OS Evol
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2024-21611
Vulnerability Information
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Vulnerability Title
Junos OS and Junos OS Evolved: In a jflow scenario continuous route churn will cause a memory leak and eventually an rpd crash
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在移除最后引用时对内存的释放不恰当(内存泄露)
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS 和 Junos OS Evolved 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS和Juniper Networks Junos OS Evolved都是美国瞻博网络（Juniper Networks）公司的产品。Juniper Networks Junos OS是一套专用于该公司的硬件设备的网络操作系统。该操作系统提供了安全编程接口和Junos SDK。Juniper Networks Junos OS Evolved是Junos OS 的升级版系统。 Juniper Networks Junos OS 和 Junos OS Evol
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Juniper Networks | Junos OS | 21.4 ~ 21.4R3 | - |
|
| Juniper Networks | Junos OS Evolved | 21.4-EVO ~ 21.4R3-EVO | - |
|
II. Public POCs for CVE-2024-21611
| # | POC Description | Source Link | Shenlong Link |
|---|
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News Coverage for CVE-2024-21611 (1)
-
Common Vulnerability Scoring System Version 4.0 Calculator technical-description
Other References for CVE-2024-21611 (1)
-
https://supportportal.juniper.net/JSA75752 vendor-advisory
Same Patch Batch · Juniper Networks · 2024-01-12 · 23 CVEs total
| CVE-2024-21591 | 9.8 CRITICAL | Junos OS: SRX Series and EX Series: Security Vulnerability in J-web allows a preAuth Remot |
| CVE-2024-21616 | 7.5 HIGH | Junos OS: MX Series and SRX Series: Processing of a specific SIP packet causes NAT IP allo |
| CVE-2024-21614 | 7.5 HIGH | Junos OS and Junos OS Evolved: A specific query via DREND causes rpd crash |
| CVE-2024-21612 | 7.5 HIGH | Junos OS Evolved: Specific TCP traffic causes OFP core and restart of RE |
| CVE-2024-21606 | 7.5 HIGH | Junos OS: SRX Series: When "tcp-encap" is configured and specific packets are received flo |
| CVE-2024-21604 | 7.5 HIGH | Junos OS Evolved: A high rate of specific traffic will cause a complete system outage |
| CVE-2024-21602 | 7.5 HIGH | Junos OS Evolved: ACX7024, ACX7100-32C and ACX7100-48L: Traffic stops when a specific IPv4 |
| CVE-2024-21595 | 7.5 HIGH | Junos OS: EX4100, EX4400, EX4600, QFX5000 Series: A high rate of specific ICMP traffic wil |
| CVE-2024-21589 | 7.4 HIGH | Paragon Active Assurance Control Center: Information disclosure vulnerability |
| CVE-2023-36842 | 6.5 MEDIUM | Junos OS: jdhcpd will hang on receiving a specific DHCP packet |
| CVE-2024-21617 | 6.5 MEDIUM | Junos OS: BGP flap on NSR-enabled devices causes memory leak |
| CVE-2024-21587 | 6.5 MEDIUM | Junos OS: MX Series: Memory leak in bbe-smgd process if BFD liveness detection for DHCP su |
| CVE-2024-21599 | 6.5 MEDIUM | Junos OS: MX Series: MPC3E memory leak with PTP configuration |
| CVE-2024-21600 | 6.5 MEDIUM | Junos OS: PTX Series: In an FTI scenario MPLS packets hitting reject next-hop will cause a |
| CVE-2024-21603 | 6.5 MEDIUM | Junos OS: MX Series: Gathering statistics in a scaled SCU/DCU configuration will lead to a |
| CVE-2024-21613 | 6.5 MEDIUM | Junos OS and Junos OS Evolved: A link flap causes patroot memory leak which leads to rpd c |
| CVE-2024-21601 | 5.9 MEDIUM | Junos OS: SRX Series: Due to an error in processing TCP events flowd will crash |
| CVE-2024-21585 | 5.9 MEDIUM | Junos OS and Junos OS Evolved: BGP session flaps on NSR-enabled devices can cause rpd cras |
| CVE-2024-21594 | 5.5 MEDIUM | Junos OS: SRX 5000 Series: Repeated execution of a specific CLI command causes a flowd cra |
| CVE-2024-21597 | 5.3 MEDIUM | Junos OS: MX Series: In an AF scenario traffic can bypass configured lo0 firewall filters |
Showing top 20 of 23 CVEs. View all on vendor page → →
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Same vendor: Juniper Networks
-
CVE-2026-57054
Junos OS: MX Series: Web filtering doesn't block specificall -
CVE-2026-57032
Junos OS: EX Series: Subscribing to an unsupported telemetry -
CVE-2026-57031
Junos OS: MX Series: For subscribers configured on static in -
CVE-2026-57030
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V. Comments for CVE-2024-21611
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