CVE-2024-21595
Reported by juniper · Published January 12, 2024
An Improper Validation of Syntactic Correctness of Input vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS). If an attacker sends high rate of specific ICMP traffic to a device with VXLAN configured, this causes a deadlock of the PFE and results in the device becoming unresponsive. A manual restart will be required to recover the device. This issue only affects EX4100, EX4400, EX4600, QFX5000 Series devices. This issue affects: Juniper Networks Junos OS * 21.4R3 versions earlier than 21.4R3-S4; * 22.1R3 versions earlier than 22.1R3-S3; * 22.2R2 versions earlier than 22.2R3-S1; * 22.3 versions earlier than 22.3R2-S2, 22.3R3; * 22.4 versions earlier than 22.4R2; * 23.1 versions earlier than 23.1R2.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| junos | juniper | 23.1R2, 22.4R2, 22.3R3, 22.3R2-S2, 22.2R3-S1, 22.1R3-S3, 21.4R3-S4 |
| Junos OS | Juniper Networks | 23.1R2, 22.4R2, 22.3R2-S2, 22.3R3, 22.2R3-S1, 22.1R3-S3, 21.4R3-S4 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Juniper Networks | Junos OS | 21.4R3, 22.1R3, 22.2R2 |
| juniper | junos | 21.4R3, 22.1R3, 22.2R2 |
| Juniper Networks | Junos OS | 22.2R2, 22.4, 21.4R3 |
Timeline
- Jan 10, 2024 CVE Published
- Jan 18, 2024 EPSS Score (30 in total, the first dated here)
- Apr 10, 2025 CVE Updated
- Jun 2, 2026 Security Advisory
- Jul 20, 2026 Coalition ESS Score
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2024-21595
vulnetix vdb fixes CVE-2024-21595Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2024-21595/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart