Junos: RPD core due to BGP UPDATE with malformed optional transitive attributes
Published Oct 13, 2017
5.9
MEDIUMCVSS 3.0
EPSS 1.51%
Description
When the 'bgp-error-tolerance' feature â€" designed to help mitigate remote session resets from malformed path attributes â€" is enabled, a BGP UPDATE containing a specifically crafted set of transitive attributes can cause the RPD routing process to crash and restart. Devices with BGP enabled that do not have 'bgp-error-tolerance' configured are not vulnerable to this issue. Affected releases are Juniper Networks Junos OS 13.3 prior to 13.3R10-S2; 14.1 prior to 14.1R8-S4, 14.1R9; 14.1X50 prior to 14.1X50-D185; 14.1X53 prior to 14.1X53-D45, 14.1X53-D50; 14.2 prior to 14.2R7-S7, 14.2R8; 15.1 prior to 15.1F5-S8, 15.1F6-S7, 15.1R5-S6, 15.1R6-S2, 15.1R7; 15.1X49 prior to 15.1X49-D100; 15.1X53 prior to 15.1X53-D64, 15.1X53-D70; 16.1 prior to 16.1R3-S4, 16.1R4-S3, 16.1R5; 16.2 prior to 16.2R1-S5, 16.2R2; 17.1 prior to 17.1R1-S3, 17.1R2; 17.2 prior to 17.2R1-S2, 17.2R2; 17.2X75 prior to 17.2X75-D50. No other Juniper Networks products or platforms are affected by this issue.
Affected products
-
- Version 13.3 prior to 13.3R10-S2StatusaffectedConstraints-
- Version 14.1 prior to 14.1R8-S4, 14.1R9StatusaffectedConstraints-
- Version 14.1X50 prior to 14.1X50-D185StatusaffectedConstraints-
- Version 14.1X53 prior to 14.1X53-D45, 14.1X53-D50StatusaffectedConstraints-
- Version 14.2 prior to 14.2R7-S7, 14.2R8StatusaffectedConstraints-
- Version 15.1 prior to 15.1F5-S8, 15.1F6-S7, 15.1R5-S6, 15.1R6-S2, 15.1R7StatusaffectedConstraints-
- Version 15.1X49 prior to 15.1X49-D100StatusaffectedConstraints-
- Version 15.1X53 prior to 15.1X53-D64, 15.1X53-D70StatusaffectedConstraints-
- Version 16.1 prior to 16.1R3-S4, 16.1R4-S3, 16.1R5StatusaffectedConstraints-
- Version 16.2 prior to 16.2R1-S5, 16.2R2StatusaffectedConstraints-
- Version 17.1 prior to 17.1R1-S3, 17.1R2StatusaffectedConstraints-
- Version 17.2 prior to 17.2R1-S2, 17.2R2StatusaffectedConstraints-
- Version 17.2X75 prior to 17.2X75-D50StatusaffectedConstraints-
- 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 4
- 14.1x53
- 14.1x53
- 14.1x53
- 14.1x53
- 14.1x53
- 14.1x53
- 14.1x53
- 14.1x53
- 14.1x53
- 14.1x53
- 14.1x53
- 14.1x53
- 14.1x53
- 14.1x53
Configuration 5
Configuration 6
- 15.1
- 15.1
- 15.1
- 15.1
- 15.1
- 15.1
- 15.1
- 15.1
- 15.1
- 15.1
- 15.1
- 15.1
- 15.1
- 15.1
- 15.1
- 15.1
- 15.1
- 15.1
- 15.1
Configuration 7
- 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 8
- 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
- 15.1x53
- 15.1x53
- 15.1x53
Configuration 9
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
If 'bgp-error-tolerance' is enabled, disabling this option under 'protocols bgp' will mitigate this issue.
Note that when the error handling feature is off, the router is vulnerable to session resets from malformed path attributes. However, this is RFC 4271 compliant behavior.
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
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
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 | 1.51% (0.01512) | 73.53th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.51% (0.01512) | 73.32th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.24% (0.00239) | 62.36th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.24% (0.00239) | 61.24th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.34% (0.00340) | 66.83th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00954) | 16.28th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.83% (0.00833) | 24.58th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.83% (0.00833) | 0.00th | v1 |
No CWE recorded.
References (3)
- https://kb.juniper.net/JSA10820 x_refsource_CONFIRMMitigationVendor Advisory
- https://www.juniper.net/documentation/en_US/junos/topics/concept/bgp-error-handling-overview.html x_refsource_MISCVendor Advisory
- https://www.juniper.net/documentation/en_US/junos/topics/reference/configuration-statement/bgp-error-tolerance.html x_refsource_MISCVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://kb.juniper.net/JSA10820 | x_refsource_CONFIRMMitigationVendor Advisory | |
| https://www.juniper.net/documentation/en_US/junos/topics/concept/bgp-error-handling-overview.html | x_refsource_MISCVendor Advisory | |
| https://www.juniper.net/documentation/en_US/junos/topics/reference/configuration-statement/bgp-error-tolerance.html | x_refsource_MISCVendor Advisory |
Change history (0)
No recorded changes yet.