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CVE-2020-1604

Junos OS: EX4300/EX4600/QFX3500/QFX5100 Series: Stateless IP firewall filter may fail to evaluate certain packets

Medium6.5EPSS 0.85%
Published
Updated
Reserved
Assigned by
juniper

Description

On EX4300, EX4600, QFX3500, and QFX5100 Series, a vulnerability in the IP firewall filter component may cause the firewall filter evaluation of certain packets to fail. This issue only affects firewall filter evaluation of certain packets destined to the device Routing Engine (RE). This issue does not affect the Layer 2 firewall filter evaluation nor does it affect the Layer 3 firewall filter evaluation destined to connected hosts. This issue may occur when evaluating both IPv4 or IPv6 packets. This issue affects Juniper Networks Junos OS: 14.1X53 versions prior to 14.1X53-D12 on QFX5100 Series and EX4600 Series; 14.1X53 versions prior to 14.1X53-D52 on QFX3500 Series; 14.1X53 versions prior to 14.1X53-D48 on EX4300 Series; 15.1 versions prior to 15.1R7-S3 on EX4300 Series; 16.1 versions prior to 16.1R7 on EX4300 Series; 17.1 versions prior to 17.1R3 on EX4300 Series; 17.2 versions prior to 17.2R3 on EX4300 Series; 17.3 versions prior to 17.3R2-S5, 17.3R3 on EX4300 Series; 17.4 versions prior to 17.4R2 on EX4300 Series; 18.1 versions prior to 18.1R3 on EX4300 Series; 18.2 versions prior to 18.2R2 on EX4300 Series.

Scores

CVSS scores of CVE-2020-1604, by who scored it
Scored byCVSSScoreVector
juniperCNA (assigner)3.1Medium6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
NVDNVD · Modified3.1Medium5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS (exploitation in 30 days)
0.85% · top 42% of all CVEs (6 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 14.1X53 – < 14.1X53-D12

  • Juniper Networks · Junos OS

    • affected 14.1X53 – < 14.1X53-D52

  • Juniper Networks · Junos OS

    • affected 14.1X53 – < 14.1X53-D48
    • affected 15.1 – < 15.1R7-S3
    • affected 16.1 – < 16.1R7
    • affected 17.1 – < 17.1R3
    • affected 17.2 – < 17.2R3
    • affected 17.3 – < 17.3R2-S5, 17.3R3
    • affected 17.4 – < 17.4R2
    • affected 18.1 – < 18.1R3
    • affected 18.2 – < 18.2R2

What to do

Solution: For QFX5100 Series and EX4600 Series: The following software releases have been updated to resolve this specific issue: 14.1X53-D12 and all subsequent releases. For QFX3500 Series: The following software releases have been updated to resolve this specific issue: 14.1X53-D52 and all subsequent releases. For EX4300 Series: The following software releases have been updated to resolve this specific issue: 14.1X53-D48, 15.1R7-S3, 16.1R7, 17.1R3, 17.2R3, 17.3R2-S5, 17.3R3, 17.4R2, 18.1R3, 18.2R2, 18.3R1 and all subsequent releases.

Workaround: There are no known 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 .