Junos OS: Denial of service in telnetd
Published Oct 10, 2018
5.3
MEDIUMCVSS 3.0
EPSS 2.27%
Description
A denial of service vulnerability in the telnetd service on Junos OS allows remote unauthenticated users to cause high CPU usage which may affect system performance. Affected releases are Juniper Networks Junos OS: 12.1X46 versions prior to 12.1X46-D81 on SRX Series; 12.3 versions prior to 12.3R12-S11; 12.3X48 versions prior to 12.3X48-D80 on SRX Series; 15.1 versions prior to 15.1R7; 15.1X49 versions prior to 15.1X49-D150, 15.1X49-D160 on SRX Series; 15.1X53 versions prior to 15.1X53-D59 on EX2300/EX3400 Series; 15.1X53 versions prior to 15.1X53-D68 on QFX10K Series; 15.1X53 versions prior to 15.1X53-D235 on QFX5200/QFX5110 Series; 15.1X53 versions prior to 15.1X53-D495 on NFX Series; 16.1 versions prior to 16.1R4-S12, 16.1R6-S6, 16.1R7; 16.2 versions prior to 16.2R2-S7, 16.2R3; 17.1 versions prior to 17.1R2-S9, 17.1R3; 17.2 versions prior to 17.2R2-S6, 17.2R3; 17.2X75 versions prior to 17.2X75-D100; 17.3 versions prior to 17.3R2-S4, 17.3R3; 17.4 versions prior to 17.4R1-S5, 17.4R2; 18.2X75 versions prior to 18.2X75-D5.
Affected products
-
- Version 12.1X46StatusaffectedConstraints<12.1X46-D81
- Version 12.3StatusaffectedConstraints<12.3R12-S11
- Version 12.3X48StatusaffectedConstraints<12.3X48-D80
- Version 15.1StatusaffectedConstraints<15.1R7
- Version 15.1X49StatusaffectedConstraints<15.1X49-D150, 15.1X49-D160
- Version 15.1X53StatusaffectedConstraints<15.1X53-D235
- Version 15.1X53StatusaffectedConstraints<15.1X53-D495
- Version 15.1X53StatusaffectedConstraints<15.1X53-D59
- Version 15.1X53StatusaffectedConstraints<15.1X53-D68
- Version 16.1StatusaffectedConstraints<16.1R4-S12, 16.1R6-S6, 16.1R7
- Version 16.2StatusaffectedConstraints<16.2R2-S7, 16.2R3
- Version 17.1StatusaffectedConstraints<17.1R2-S9, 17.1R3
- Version 17.2StatusaffectedConstraints<17.2R2-S6, 17.2R3
- Version 17.2X75StatusaffectedConstraints<17.2X75-D100
- Version 17.3StatusaffectedConstraints<17.3R2-S4, 17.3R3
- Version 17.4StatusaffectedConstraints<17.4R1-S5, 17.4R2
- Version 18.2X75StatusaffectedConstraints<18.2X75-D5
- 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
- 12.1x46
- 12.1x46
- 12.1x46
- 12.1x46
- 12.1x46
- 12.1x46
- 12.1x46
- 12.1x46
- 12.1x46
- 12.1x46
- 12.1x46
- 12.1x46
- 12.1x46
Configuration 2
Configuration 3
- 12.3x48
- 12.3x48
- 12.3x48
- 12.3x48
- 12.3x48
- 12.3x48
- 12.3x48
- 12.3x48
- 12.3x48
- 12.3x48
- 12.3x48
- 12.3x48
- 12.3x48
- 12.3x48
- 12.3x48
Configuration 4
Configuration 5
- 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
- 15.1x49
- 15.1x49
- 15.1x49
- 15.1x49
- 15.1x49
- 15.1x49
Configuration 6
Configuration 7
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
- 15.1x53
Configuration 8
Configuration 9
Configuration 10
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: 12.1X46-D81, 12.3R12-S11, 12.3R13, 12.3X48-D80, 15.1R7, 15.1X49-D150, 15.1X49-D160, 15.1X53-D235, 15.1X53-D495, 15.1X53-D59, 15.1X53-D68, 16.1R4-S12, 16.1R6-S6, 16.1R7, 16.2R2-S7, 16.2R3, 17.1R2-S9, 17.1R3, 17.2R2-S6, 17.2R3, 17.2X75-D100, 17.2X75-D110, 17.3R2-S4, 17.3R3, 17.4R1-S5, 17.4R2, 18.1R1, 18.1R2, 18.2R1, 18.2X75-D5, and all subsequent releases.
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:L
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 v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.27% (0.02265) | 82.40th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.27% (0.02265) | 80.67th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.17% (0.00173) | 54.82th | v3 (v2023.03.01) |
| May 29, 2024 | 0.17% (0.00173) | 54.32th | v3 (v2023.03.01) |
| Mar 2, 2024 | 0.19% (0.00189) | 55.50th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.17% (0.00166) | 51.53th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.05% (0.01055) | 50.47th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.05% (0.01055) | 48.43th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.05% (0.01055) | 27.52th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.98% (0.00976) | 26.54th | v1 |
| Jan 6, 2022 | 0.98% (0.00976) | 25.91th | v1 |
| Sep 1, 2021 | 0.98% (0.00976) | 61.78th | v1 |
| Apr 14, 2021 | 0.98% (0.00976) | 0.00th | v1 |
References (2)
- http://www.securitytracker.com/id/1041859 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://kb.juniper.net/JSA10896 x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securitytracker.com/id/1041859 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://kb.juniper.net/JSA10896 | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.