CVE-2024-21594

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-122CWE-787

Affected software

VendorProductVersions
Juniper NetworksJunos OS< 20.4R3-S6; >= 21.1, < 21.1R3-S5; >= 21.2, < 21.2R3-S4; >= 21.3, < 21.3R3-S3; >= 21.4, < 21.4R3-S3; >= 22.1, < 22.1R3-S1; >= 22.2, < 22.2R3; >= 22.3, < 22.3R2

References

Timeline

Published
Jan 12, 2024
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2024

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CVE-2024-21594: Medium severity, CVSS 5.5 | Vulnix