Junos OS: jdhcpd daemon crash due to invalid IPv6 UDP packets
Published Jul 14, 2017
7.5
HIGHCVSS 3.0
EPSS 1.30%
Description
The Juniper Enhanced jdhcpd daemon may experience high CPU utilization, or crash and restart upon receipt of an invalid IPv6 UDP packet. Both high CPU utilization and repeated crashes of the jdhcpd daemon can result in a denial of service as DHCP service is interrupted. No other Juniper Networks products or platforms are affected by this issue. Affected releases are Juniper Networks Junos OS 14.1X53 prior to 14.1X53-D12, 14.1X53-D38, 14.1X53-D40 on QFX, EX, QFabric System; 15.1 prior to 15.1F2-S18, 15.1R4 on all products and platforms; 15.1X49 prior to 15.1X49-D80 on SRX; 15.1X53 prior to 15.1X53-D51, 15.1X53-D60 on NFX, QFX, EX.
Affected products
-
- Version 14.1X53 prior to 14.1X53-D12, 14.1X53-D38, 14.1X53-D40StatusaffectedConstraints-
- Version 15.1 prior to 15.1F2-S18, 15.1R4StatusaffectedConstraints-
- Version 15.1X49 prior to 15.1X49-D80StatusaffectedConstraints-
- Version 15.1X53 prior to 15.1X53-D51, 15.1X53-D60StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Juniper Networks | Junos OS | n/a |
|
Configuration 1
Configuration 2
Configuration 3
- 15.1x49
- 15.1x49
- 15.1x49
- 15.1x49
- 15.1x49
- 15.1x49
- 15.1x49
- 15.1x49
- 15.1x49
- 15.1x49
- 15.1x49
- 15.1x49
- 15.1x49
Configuration 4
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
Devices that have the ability to transition from Juniper's Enhanced DHCP server, JDHCPD, to the legacy DHCP server, DHCPD, can move back to legacy. Devices that do not support the ability to transition from Enhanced DHCP to Legacy DHCP do not have a workaround available unless customers decide to disable the DHCP services and forward DHCP client requests to other DHCP servers or discontinue the use of DHCP services.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:P
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
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.30% (0.01296) | 69.30th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.30% (0.01296) | 69.05th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.10% (0.00096) | 40.79th | v3 (v2023.03.01) |
| Jun 12, 2024 | 0.10% (0.00096) | 40.49th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.10% (0.00095) | 38.48th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.78% (0.00777) | 21.50th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.78% (0.00777) | 0.00th | v1 |
References (2)
- http://www.securitytracker.com/id/1038899 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://kb.juniper.net/JSA10800 x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securitytracker.com/id/1038899 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://kb.juniper.net/JSA10800 | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.