CVE-2024-30388Junos OS: QFX5000 Series and EX Series: Specific malformed LACP packets will cause flaps
- 7.1HighCVSS base score
- 0.29%Exploitation in 30 daysEPSS · top 78% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
An Improper Isolation or Compartmentalization vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on QFX5000 Series and EX Series allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS). If a specific malformed LACP packet is received by a QFX5000 Series, or an EX4400, EX4100 or EX4650 Series device, an LACP flap will occur resulting in traffic loss. This issue affects Junos OS on QFX5000 Series, and on EX4400, EX4100 or EX4650 Series: * 20.4 versions from 20.4R3-S4 before 20.4R3-S8, * 21.2 versions from 21.2R3-S2 before 21.2R3-S6, * 21.4 versions from 21.4R2 before 21.4R3-S4, * 22.1 versions from 22.1R2 before 22.1R3-S3, * 22.2 versions before 22.2R3-S1, * 22.3 versions before 22.3R2-S2, 22.3R3, * 22.4 versions before 22.4R2-S1, 22.4R3.
Timeline
ID reserved
By juniper
- 17 days later
· 17 days later
Published
- 4 months later
· 4 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| juniperCNA (assigner) | 4.0 | High7.1 | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L |
| juniperCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Analyzed | 4.0 | High7.1 | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.29% · top 78% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.
Affected products
- affected 20.4R3-S4 – < 20.4R3-S8
- affected 21.2R3-S2 – < 21.2R3-S6
- affected 21.4R2 – < 21.4R3-S4
- affected 22.1R2 – < 22.1R3-S3
- affected 22.2 – < 22.2R3-S1
- affected 22.3 – < 22.3R2-S2, 22.3R3
- affected 22.4 – < 22.4R2-S1, 22.4R3
What to do
Solution: The following software releases have been updated to resolve this specific issue: 20.4R3-S8, 21.2R3-S6, 21.3R3-S5, 21.4R3-S4, 22.1R3-S3, 22.2R3-S1, 22.3R2-S2, 22.3R3, 22.4R2-S1, 22.4R3, 23.2R1, and all subsequent releases.
Workaround: There are no known workarounds for this issue.
Exploitation: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
References
References2
- http://supportportal.juniper.net/JSA79089 (opens in a new tab)vendor-advisoryx_transferred
- https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L (opens in a new tab)technical-descriptionx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-28309 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-30388)Record last updated .