A Heap-based Buffer Overflow vulnerability in the Network Services Daemon (NSD) of Juniper Networks Junos OS allows authenticated, low privileged, local attacker to cause a Denial of Service (DoS).
On an SRX 5000 Series device, when executing a specific command repeatedly, memory is corrupted, which leads to a Flow Processing Daemon (flowd) crash.
The NSD process has to be restarted to restore services.
If this issue occurs, it can be checked with the following command:
user@host> request security policies check
The following log message can also be observed:
Error: policies are out of sync for PFE node<number>.fpc<number>.pic<number>.
This issue affects:
Juniper Networks Junos OS on SRX 5000 Series
All versions earlier than 20.4R3-S6;
21.1 versions earlier than 21.1R3-S5;
21.2 versions earlier than 21.2R3-S4;
21.3 versions earlier than 21.3R3-S3;
21.4 versions earlier than 21.4R3-S3;
22.1 versions earlier than 22.1R3-S1;
22.2 versions earlier than 22.2R3;
22.3 versions earlier than 22.3R2.
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-2024-21594.
The following software releases have been updated to resolve this specific issue: 20.4R3-S6, 21.1R3-S5, 21.2R3-S4, 21.3R3-S3, 21.3R3-S4, 21.4R3-S3, 22.1R3-S1, 22.2R3, 22.3R2, 22.4R1, 22.4R2, 23.1R1, and all subsequent releases.
This issue is being tracked as PR 1694960 which is visible on the Customer Support website.
Note: Juniper SIRT's policy [juniper.net] is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).
There are no known workarounds for this issue.
2024-01-10: Initial Publication