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TI-2024-20138 Aliases CVE-2024-30410GHSA-96r2-52xr-8x9x

Junos OS: EX4300 Series: Loopback filter not blocking traffic despite having discard term.

Priority LOW 36CWE-696Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

An Incorrect Behavior Order in the routing engine (RE) of Juniper Networks Junos OS on EX4300 Series allows traffic intended to the device to reach the RE instead of being discarded when the discard term is set in loopback (lo0) interface. The intended function is that the lo0 firewall filter takes precedence over the revenue interface firewall filter.  This issue affects only IPv6 firewall filter. This issue only affects the EX4300 switch. No other products or platforms are affected by this vulnerability.  This issue affects Juniper Networks Junos OS: * All versions before 20.4R3-S10, * from 21.2 before 21.2R3-S7, * from 21.4 before 21.4R3-S6.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00363 30th percentileScored 2026-11-07
Fix Fixed Junos (Juniper Networks): 20.4R3-S10, 21.2R3-S7, 21.4R3-S6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
JuniperJunosbefore 20.4R3-S10; 21.2 to before 21.2R3-S7; 21.4 to before 21.4R3-S620.4R3-S10, 21.2R3-S7, 21.4R3-S6Patch availableCNA
  • Junos VendorJuniper Affected before 20.4R3-S10; 21.2 to before 21.2R3-S7; 21.4 to before 21.4R3-S6 Fixed in 20.4R3-S10, 21.2R3-S7, 21.4R3-S6 Patch available CNA

CPE configurations NVD · 60

CPEVersionsRoleVendor
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*before 20.4VulnerableJuniper
cpe:2.3:o:juniper:junos:20.4:-:*:*:*:*:*:*20.4VulnerableJuniper
cpe:2.3:o:juniper:junos:20.4:r1:*:*:*:*:*:*20.4 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:20.4:r1-s1:*:*:*:*:*:*20.4 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:20.4:r2:*:*:*:*:*:*20.4 r2VulnerableJuniper
cpe:2.3:o:juniper:junos:20.4:r2-s1:*:*:*:*:*:*20.4 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:20.4:r2-s2:*:*:*:*:*:*20.4 r2-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:20.4:r3:*:*:*:*:*:*20.4 r3VulnerableJuniper
cpe:2.3:o:juniper:junos:20.4:r3-s1:*:*:*:*:*:*20.4 r3-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:20.4:r3-s2:*:*:*:*:*:*20.4 r3-s2VulnerableJuniper
  • cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* Versions before 20.4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:20.4:-:*:*:*:*:*:* Versions 20.4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:20.4:r1:*:*:*:*:*:* Versions 20.4 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:20.4:r1-s1:*:*:*:*:*:* Versions 20.4 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:20.4:r2:*:*:*:*:*:* Versions 20.4 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:20.4:r2-s1:*:*:*:*:*:* Versions 20.4 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:20.4:r2-s2:*:*:*:*:*:* Versions 20.4 r2-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:20.4:r3:*:*:*:*:*:* Versions 20.4 r3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:20.4:r3-s1:*:*:*:*:*:* Versions 20.4 r3-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:20.4:r3-s2:*:*:*:*:*:* Versions 20.4 r3-s2 Vulnerable ·Juniper
Show 50 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:juniper:junos:20.4:r3-s3:*:*:*:*:*:*20.4 r3-s3VulnerableJuniper
cpe:2.3:o:juniper:junos:20.4:r3-s4:*:*:*:*:*:*20.4 r3-s4VulnerableJuniper
cpe:2.3:o:juniper:junos:20.4:r3-s5:*:*:*:*:*:*20.4 r3-s5VulnerableJuniper
cpe:2.3:o:juniper:junos:20.4:r3-s6:*:*:*:*:*:*20.4 r3-s6VulnerableJuniper
cpe:2.3:o:juniper:junos:20.4:r3-s7:*:*:*:*:*:*20.4 r3-s7VulnerableJuniper
cpe:2.3:o:juniper:junos:20.4:r3-s8:*:*:*:*:*:*20.4 r3-s8VulnerableJuniper
cpe:2.3:o:juniper:junos:20.4:r3-s9:*:*:*:*:*:*20.4 r3-s9VulnerableJuniper
cpe:2.3:o:juniper:junos:21.2:-:*:*:*:*:*:*21.2VulnerableJuniper
cpe:2.3:o:juniper:junos:21.2:r1:*:*:*:*:*:*21.2 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:21.2:r1-s1:*:*:*:*:*:*21.2 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:21.2:r1-s2:*:*:*:*:*:*21.2 r1-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:21.2:r2:*:*:*:*:*:*21.2 r2VulnerableJuniper
cpe:2.3:o:juniper:junos:21.2:r2-s1:*:*:*:*:*:*21.2 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:21.2:r2-s2:*:*:*:*:*:*21.2 r2-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:21.2:r3:*:*:*:*:*:*21.2 r3VulnerableJuniper
cpe:2.3:o:juniper:junos:21.2:r3-s1:*:*:*:*:*:*21.2 r3-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:21.2:r3-s2:*:*:*:*:*:*21.2 r3-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:21.2:r3-s3:*:*:*:*:*:*21.2 r3-s3VulnerableJuniper
cpe:2.3:o:juniper:junos:21.2:r3-s4:*:*:*:*:*:*21.2 r3-s4VulnerableJuniper
cpe:2.3:o:juniper:junos:21.2:r3-s5:*:*:*:*:*:*21.2 r3-s5VulnerableJuniper
cpe:2.3:o:juniper:junos:21.2:r3-s6:*:*:*:*:*:*21.2 r3-s6VulnerableJuniper
cpe:2.3:o:juniper:junos:21.4:r1:*:*:*:*:*:*21.4 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:21.4:r1-s1:*:*:*:*:*:*21.4 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:21.4:r1-s2:*:*:*:*:*:*21.4 r1-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:21.4:r2:*:*:*:*:*:*21.4 r2VulnerableJuniper
cpe:2.3:o:juniper:junos:21.4:r2-s1:*:*:*:*:*:*21.4 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:21.4:r2-s2:*:*:*:*:*:*21.4 r2-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:21.4:r3:*:*:*:*:*:*21.4 r3VulnerableJuniper
cpe:2.3:o:juniper:junos:21.4:r3-s1:*:*:*:*:*:*21.4 r3-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:21.4:r3-s2:*:*:*:*:*:*21.4 r3-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:21.4:r3-s3:*:*:*:*:*:*21.4 r3-s3VulnerableJuniper
cpe:2.3:o:juniper:junos:21.4:r3-s4:*:*:*:*:*:*21.4 r3-s4VulnerableJuniper
cpe:2.3:o:juniper:junos:21.4:r3-s5:*:*:*:*:*:*21.4 r3-s5VulnerableJuniper
cpe:2.3:h:juniper:ex4300:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ex4300-24p:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ex4300-24p-s:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ex4300-24t:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ex4300-24t-s:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ex4300-32f:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ex4300-32f-dc:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ex4300-32f-s:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ex4300-48mp:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ex4300-48mp-s:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ex4300-48p:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ex4300-48p-s:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ex4300-48t:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ex4300-48t-afi:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ex4300-48t-dc:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ex4300-48t-dc-afi:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ex4300-48t-s:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
  • cpe:2.3:o:juniper:junos:20.4:r3-s3:*:*:*:*:*:* Versions 20.4 r3-s3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:20.4:r3-s4:*:*:*:*:*:* Versions 20.4 r3-s4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:20.4:r3-s5:*:*:*:*:*:* Versions 20.4 r3-s5 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:20.4:r3-s6:*:*:*:*:*:* Versions 20.4 r3-s6 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:20.4:r3-s7:*:*:*:*:*:* Versions 20.4 r3-s7 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:20.4:r3-s8:*:*:*:*:*:* Versions 20.4 r3-s8 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:20.4:r3-s9:*:*:*:*:*:* Versions 20.4 r3-s9 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.2:-:*:*:*:*:*:* Versions 21.2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.2:r1:*:*:*:*:*:* Versions 21.2 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.2:r1-s1:*:*:*:*:*:* Versions 21.2 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.2:r1-s2:*:*:*:*:*:* Versions 21.2 r1-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.2:r2:*:*:*:*:*:* Versions 21.2 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.2:r2-s1:*:*:*:*:*:* Versions 21.2 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.2:r2-s2:*:*:*:*:*:* Versions 21.2 r2-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.2:r3:*:*:*:*:*:* Versions 21.2 r3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.2:r3-s1:*:*:*:*:*:* Versions 21.2 r3-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.2:r3-s2:*:*:*:*:*:* Versions 21.2 r3-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.2:r3-s3:*:*:*:*:*:* Versions 21.2 r3-s3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.2:r3-s4:*:*:*:*:*:* Versions 21.2 r3-s4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.2:r3-s5:*:*:*:*:*:* Versions 21.2 r3-s5 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.2:r3-s6:*:*:*:*:*:* Versions 21.2 r3-s6 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.4:r1:*:*:*:*:*:* Versions 21.4 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.4:r1-s1:*:*:*:*:*:* Versions 21.4 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.4:r1-s2:*:*:*:*:*:* Versions 21.4 r1-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.4:r2:*:*:*:*:*:* Versions 21.4 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.4:r2-s1:*:*:*:*:*:* Versions 21.4 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.4:r2-s2:*:*:*:*:*:* Versions 21.4 r2-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.4:r3:*:*:*:*:*:* Versions 21.4 r3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.4:r3-s1:*:*:*:*:*:* Versions 21.4 r3-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.4:r3-s2:*:*:*:*:*:* Versions 21.4 r3-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.4:r3-s3:*:*:*:*:*:* Versions 21.4 r3-s3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.4:r3-s4:*:*:*:*:*:* Versions 21.4 r3-s4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:21.4:r3-s5:*:*:*:*:*:* Versions 21.4 r3-s5 Vulnerable ·Juniper
  • cpe:2.3:h:juniper:ex4300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ex4300-24p:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ex4300-24p-s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ex4300-24t:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ex4300-24t-s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ex4300-32f:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ex4300-32f-dc:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ex4300-32f-s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ex4300-48mp:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ex4300-48mp-s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ex4300-48p:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ex4300-48p-s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ex4300-48t:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ex4300-48t-afi:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ex4300-48t-dc:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ex4300-48t-dc-afi:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ex4300-48t-s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper

Remediation

  • Fix · CNA Junos (Juniper Networks) Fixed in 20.4R3-S10, 21.2R3-S7, 21.4R3-S6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-30410
  2. 2026-10-03 Alias added: GHSA-96r2-52xr-8x9x

References

Advisory 1

Other 1

  • TI-2023-18638 Junos OS: EX and SRX Series: A PHP vulnerability in J-Web allows an unauthenticated to… KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-01585 Out of Cycle Security Advisory: Junos OS: Security vulnerability in J-Web and web based (HTTP/HTTPS) services KEVCVSS 3.1CRITICAL 9.8
  • TI-2015-04610 Assertion failure in ISC BIND named via TKEY queries KEVCVSS 3.1HIGH 7.5
  • TI-2025-15550 Junos OS: An local attacker with shell access can execute arbitrary code KEVCVSS 4.0MEDIUM 6.7
  • TI-2023-18644 Junos OS: SRX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload and download arbitrary files KEVCVSS 3.1MEDIUM 5.3
  • TI-2023-18640 Junos OS: EX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload arbitrary files KEVCVSS 3.1MEDIUM 5.3
See all 792 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences