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CVE-2019-0028

Junos OS: RPD process crashes due to specific BGP peer restarts condition.

High7.5EPSS 1.2%
Published
Updated
Reserved
Assigned by
juniper

Description

On Junos devices with the BGP graceful restart helper mode enabled or the BGP graceful restart mechanism enabled, a BGP session restart on a remote peer that has the graceful restart mechanism enabled may cause the local routing protocol daemon (RPD) process to crash and restart. By simulating a specific BGP session restart, an attacker can repeatedly crash the RPD process causing prolonged denial of service (DoS). Graceful restart helper mode for BGP is enabled by default. No other Juniper Networks products or platforms are affected by this issue. Affected releases are Juniper Networks Junos OS: 16.1 versions prior to 16.1R7; 16.1X65 versions prior to 16.1X65-D48; 16.2 versions prior to 16.2R2-S8; 17.1 versions prior to 17.1R2-S7, 17.1R3; 17.2 versions prior to 17.2R1-S7, 17.2R3; 17.2X75 versions prior to 17.2X75-D92, 17.2X75-D102, 17.2X75-D110; 17.3 versions prior to 17.3R2-S2, 17.3R3; 17.4 versions prior to 17.4R1-S4, 17.4R2; 18.1 versions prior to 18.1R2. Junos OS releases prior to 16.1R1 are not affected.

Scores

CVSS scores of CVE-2019-0028, by who scored it
Scored byCVSSScoreVector
juniperCNA (assigner)3.0High7.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVDNVD · Modified3.1High7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
1.2% · top 31% of all CVEs (5 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

Affected products

  • Juniper Networks · Junos OS

    • unaffected unspecified – < 16.1R1
    • affected 16.1 – < 16.1R7
    • affected 16.1X65 – < 16.1X65-D48
    • affected 16.2 – < 16.2R2-S8
    • affected 17.1 – < 17.1R2-S7, 17.1R3
    • affected 17.2 – < 17.2R1-S7, 17.2R3
    • affected 17.2X75 – < 17.2X75-D92,17.2X75-D102, 17.2X75-D110
    • affected 17.3 – < 17.3R2-S2, 17.3R3
    • affected 17.4 – < 17.4R1-S4, 17.4R2
    • affected 18.1 – < 18.1R2

What to do

Solution: The following software releases have been updated to resolve this specific issue: 16.1R7, 16.1X65-D48, 16.2R2-S8, 17.1R2-S7, 17.1R3, 17.2R1-S7, 17.2R3, 17.2X75-D102, 17.2X75-D110, 17.2X75-D92, 17.3R2-S2, 17.3R3, 17.4R1-S4, 17.4R2, 18.1R2, 18.2R1, 18.2X75-D5, and all subsequent releases.

Workaround: This issue can be prevented by disabling the BGP graceful restart mechanism, including graceful restart helper mode: [protocols bgp graceful-restart disable] Furthermore, the risk associated with this issue can be mitigated by limiting BGP sessions only from trusted peers.

Exploitation: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

References (2)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .