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CVE-2019-0068

Junos OS: SRX Series: Denial of Service vulnerability in flowd due to multicast packets

Medium6.5EPSS 1.3%
Published
Updated
Reserved
Assigned by
juniper

Description

The SRX flowd process, responsible for packet forwarding, may crash and restart when processing specific multicast packets. By continuously sending the specific multicast packets, an attacker can repeatedly crash the flowd process causing a sustained Denial of Service. This issue affects Juniper Networks Junos OS on SRX Series: 12.3X48 versions prior to 12.3X48-D90; 15.1X49 versions prior to 15.1X49-D180; 17.3 versions; 17.4 versions prior to 17.4R2-S5, 17.4R3; 18.1 versions prior to 18.1R3-S6; 18.2 versions prior to 18.2R2-S4, 18.2R3; 18.3 versions prior to 18.3R2-S1, 18.3R3; 18.4 versions prior to 18.4R2; 19.1 versions prior to 19.1R1-S1, 19.1R2.

Scores

CVSS scores of CVE-2019-0068, by who scored it
Scored byCVSSScoreVector
juniperCNA (assigner)3.1Medium6.5CVSS:3.1/AV:A/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)
1.3% · top 29% 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: Medium 6.5.

Weakness

Affected products

  • Juniper Networks · Junos OS

    • affected 17.3
    • affected 12.3X48 – < 12.3X48-D90
    • affected 15.1X49 – < 15.1X49-D180
    • affected 17.4 – < 17.4R2-S5, 17.4R3
    • affected 18.1 – < 18.1R3-S6
    • affected 18.2 – < 18.2R2-S4, 18.2R3
    • affected 18.3 – < 18.3R2-S1, 18.3R3
    • affected 18.4 – < 18.4R2
    • affected 19.1 – < 19.1R1-S1, 19.1R2

What to do

Solution: The following software releases have been updated to resolve this specific issue: 12.3X48-D90, 15.1X49-D180, 17.4R2-S5, 17.4R3, 18.1R3-S6, 18.2R2-S4, 18.2R3, 18.3R2-S1, 18.3R3, 18.4R2, 19.1R1-S1, 19.1R2, 19.2R1, and all subsequent releases.

Workaround: There are no available workarounds for this issue.

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

References (1)

Sources

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

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Record last updated .