CVE-2024-47509: Junos OS Evolved: Specific low privileged CLI commands and SNMP GET requests can trigger a resource leak #3
First published: Fri Oct 11 2024(Updated: )
An Allocation of Resources Without Limits or Throttling vulnerability in the PFE management daemon (evo-pfemand) of Juniper Networks Junos OS Evolved allows an authenticated, network-based attacker to cause an FPC crash leading to a Denial of Service (DoS).When specific SNMP GET operations or specific low-priviledged CLI commands are executed, a GUID resource leak will occur, eventually leading to exhaustion and resulting in FPCs to hang. Affected FPCs need to be manually restarted to recover. GUID exhaustion will trigger a syslog message like one of the following: evo-pfemand[<pid>]: get_next_guid: Ran out of Guid Space ... evo-aftmand-zx[<pid>]: get_next_guid: Ran out of Guid Space ... The leak can be monitored by running the following command and taking note of the values in the rightmost column labeled Guids: user@host> show platform application-info allocations app evo-pfemand/evo-pfemand In case one or more of these values are constantly increasing the leak is happening. This issue affects Junos OS Evolved: * All versions before 21.4R2-EVO, * 22.1 versions before 22.1R2-EVO. Please note that this issue is similar to, but different from CVE-2024-47505 and CVE-2024-47508.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Juniper Networks Junos OS | <21.4R2-EVO<22.1R2-EVO |
Remedy
The following software releases have been updated to resolve this specific issue: 21.4R2-EVO, 22.1R2-EVO, 22.2R1-EVO, and all subsequent releases.
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-47509?
CVE-2024-47509 has a high severity rating due to its potential to cause Denial of Service (DoS) by crashing the Forwarding Plane Card (FPC).
How do I fix CVE-2024-47509?
To mitigate CVE-2024-47509, users should upgrade to a version of Junos OS Evolved that is not affected, specifically versions beyond 22.1R2-EVO.
Who is affected by CVE-2024-47509?
CVE-2024-47509 affects authenticated users of the Juniper Networks Junos OS Evolved versions up to 22.1R2-EVO.
What type of vulnerability is CVE-2024-47509?
CVE-2024-47509 is classified as an Allocation of Resources Without Limits or Throttling vulnerability.
What impact does CVE-2024-47509 have on systems?
CVE-2024-47509 can lead to an FPC crash, ultimately resulting in a Denial of Service, affecting the availability of the network.
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