A Missing Release of Memory after Effective Lifetime vulnerability in Flexible PIC Concentrator (FPC) of Juniper Networks Junos OS allows an adjacent, unauthenticated attacker from the same shared physical or logical network, to cause a heap memory leak and leading to FPC crash.
 

On all Junos PTX Series and QFX10000 Series, when specific EVPN VXLAN Multicast packets are processed, an FPC memory leak is observed.
 

The FPC memory usage can be monitored using the CLI command "show heap extensive". Following is an example output. Observe the column "Peak used %". It would go higher and eventually result in heap memory leak.

ID      Base      Total(b)       Free(b)       Used(b)   %   Name         Peak used %
--  --------     ---------     ---------     ---------  ---   -----------  -----------
0  37dcf000    3221225472    1694526368    1526699104   47        Kernel        47
1  17dcf000       1048576       1048576             0    0       TOE DMA         0
2  17ecf000       1048576       1048576             0    0           DMA         0
3  17fcf000     534773760     280968336     253805424   47    Packet DMA        47

This issue affects:

Juniper Networks Junos OS PTX Series and QFX10000 Series

• 20.2 versions prior to 20.2R3-S6;
• 20.3 versions prior to 20.3R3-S6;
• 20.4 versions prior to 20.4R3-S4;
• 21.1 versions prior to 21.1R3-S3;
• 21.2 versions prior to 21.2R3-S1;
• 21.3 versions prior to 21.3R3;
• 21.4 versions prior to 21.4R3;
• 22.1 versions prior to 22.1R2;
• 22.2 versions prior to 22.2R2.

This issue does not affect Juniper Networks Junos OS versions prior to 20.1R1 on PTX Series and QFX10000 Series.

This issue can occur when multicast and EVPN are configured: 

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue was seen during production usage.

This issue has been assigned CVE-2023-22414.

The following software releases have been updated to resolve this specific issue: 20.2R3-S6, 20.3R3-S6, 20.4R3-S4, 21.1R3-S3, 21.2R3-S1, 21.3R3, 21.4R3, 22.1R2, 22.2R2, 22.3R1, and all subsequent releases.
 

This issue is being tracked as 1661286.
 

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).

• 2023-01-11: Initial Publication

• KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process [juniper.net]
• KB16765: In which releases are vulnerabilities fixed? [juniper.net]
• KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories [juniper.net]
• Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team
• CVE-2023-22414 at cve.mitre.org