Junos: QFX Series: Insufficient entropy on QFX3500 and QFX3600 platforms when the system boots up
Published Feb 28, 2020
6.5
MEDIUMCVSS 3.1
EPSS 0.77%
Description
On the QFX3500 and QFX3600 platforms, the number of bytes collected from the RANDOM_INTERRUPT entropy source when the device boots up is insufficient, possibly leading to weak or duplicate SSH keys or self-signed SSL/TLS certificates. Entropy increases after the system has been up and running for some time, but immediately after boot, the entropy is very low. This issue only affects the QFX3500 and QFX3600 switches. No other Juniper Networks products or platforms are affected by this weak entropy vulnerability.
Affected products
No data.
- 12.2x50
- 12.2x50
- 12.2x50
- 12.2x50
- 12.2x50
- 13.1x50
- 13.1x50
- 13.2x51
- 13.2x51
- 13.2x51
- 13.2x51
- 13.2x52
- 13.2x52
- 14.1x53
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
The following software releases have been updated to resolve this specific issue: Junos OS 12.2X50-D70 13.1X50-D30 13.2X51-D25 13.2X51-D30 13.2X52-D15 14.1X53-D10, and all subsequent releases. It is recommended to regenerate SSH keys or self signed certificates.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:S/C:C/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.77% (0.00771) | 54.00th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.77% (0.00771) | 50.66th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.21% (0.00212) | 41.73th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.07% (0.00065) | 30.58th | v3 (v2023.03.01) |
| Jun 14, 2024 | 0.07% (0.00065) | 28.56th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.07% (0.00065) | 26.56th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00885) | 26.24th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
References (1)
- https://kb.juniper.net/JSA10678 x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://kb.juniper.net/JSA10678 | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.