MX series, SRX series: Junos OS: Denial of service vulnerability in Flowd on devices with ALG enabled.
Published Jan 10, 2018
8.2
HIGHCVSS 3.0
EPSS 1.54%
Description
On SRX Series and MX Series devices with a Service PIC with any ALG enabled, a crafted TCP/IP response packet processed through the device results in memory corruption leading to a flowd daemon crash. Sustained crafted response packets lead to repeated crashes of the flowd daemon which results in an extended Denial of Service condition. Affected releases are Juniper Networks Junos OS: 12.1X46 versions prior to 12.1X46-D60 on SRX series; 12.3X48 versions prior to 12.3X48-D35 on SRX series; 14.1 versions prior to 14.1R9 on MX series; 14.2 versions prior to 14.2R8 on MX series; 15.1X49 versions prior to 15.1X49-D60 on SRX series; 15.1 versions prior to 15.1R5-S8, 15.1F6-S9, 15.1R6-S4, 15.1R7 on MX series; 16.1 versions prior to 16.1R6 on MX series; 16.2 versions prior to 16.2R3 on MX series; 17.1 versions prior to 17.1R2-S4, 17.1R3 on MX series. No other Juniper Networks products or platforms are affected by this issue.
Affected products
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- Version 12.1X46StatusaffectedConstraints<12.1X46-D60
- Version 12.3X48StatusaffectedConstraints<12.3X48-D35
- Version 14.1StatusaffectedConstraints<14.1R9
- Version 14.2StatusaffectedConstraints<14.2R8
- Version 15.1StatusaffectedConstraints<15.1R5-S8, 15.1F6-S9, 15.1R6-S4, 15.1R7
- Version 15.1X49StatusaffectedConstraints<15.1X49-D60
- Version 16.1StatusaffectedConstraints<16.1R6
- Version 16.2StatusaffectedConstraints<16.2R3
- Version 17.1StatusaffectedConstraints<17.1R2-S4, 17.1R3
- 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 | ||||||||||||||||||||||||||||||
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| Juniper Networks | Junos OS | n/a |
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Configuration 1
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Configuration 2
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Configuration 3
Configuration 4
Configuration 5
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Configuration 6
Configuration 7
Configuration 8
Configuration 9
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-D60, 12.3X48-D35, 14.1R9, 14.2R8, 15.1X49-D60, 15.1R5-S8, 15.1R6-S4, 15.1F6-S9, 15.1R7, 16.1R6, 16.2R3, 17.1R2-S4, 17.1R3, 17.2R1 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:H/PR:N/UI:N/S:U/C:N/I:N/A:H
1 other source (CVE.org) ▾
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
AV:N/AC:M/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
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.54% (0.01544) | 74.06th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.57% (0.01574) | 72.13th | v5 (v2026.06.15) |
| Mar 17, 2025 | 1.84% (0.01840) | 81.77th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.10% (0.00096) | 40.79th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.10% (0.00095) | 39.27th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.08% (0.00079) | 32.40th | 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 | 0.64% (0.00635) | 17.82th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.64% (0.00635) | 0.00th | v1 |
References (2)
- http://www.securitytracker.com/id/1040178 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://kb.juniper.net/JSA10829 x_refsource_CONFIRMMitigationPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securitytracker.com/id/1040178 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://kb.juniper.net/JSA10829 | x_refsource_CONFIRMMitigationPatchVendor Advisory |
Change history (0)
No recorded changes yet.