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2020-01 Security Bulletin: Junos OS: MX Series: In BBE configurations, receipt of a specific packet causes a Denial of Service (CVE-2020-1608)

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Article ID: JSA10987 SECURITY_ADVISORIES Last Updated: 13 Feb 2020Version: 5.0
Product Affected:
This issue affects Junos OS 17.2, 17.3, 17.4, 18.1, 18.2, 18.2X75, 18.3, 18.4, 19.1, 19.2. Affected platforms: MX Series.
Problem:

Receipt of a specific packet on the core facing interface of an MX Series device configured for Broadband Edge (BBE) service may trigger a kernel crash (vmcore), causing the device to reboot.

The issue is specific to the processing of packets destined to BBE clients connected to MX Series subscriber management platforms.

This issue affects MX Series running Juniper Networks Junos OS:

17.2 versions starting from17.2R2-S6, 17.2R3 and later releases, prior to 17.2R3-S3;

17.3 versions starting from 17.3R2-S4, 17.3R3-S2 and later releases, prior to 17.3R2-S5, 17.3R3-S5;

17.4 versions starting from 17.4R2 and later releases, prior to 17.4R2-S7,17.4R3;

18.1 versions starting from 18.1R2-S3, 18.1R3 and later releases, prior to 18.1R3-S6;

18.2 versions starting from18.2R1-S1, 18.2R2 and later releases, prior to 18.2R3-S2;

18.2X75 versions prior to 18.2X75-D51, 18.2X75-D60;

18.3 versions prior to 18.3R3;

18.4 versions prior to 18.4R2;

19.1 versions prior to 19.1R1-S3, 19.1R2;

19.2 versions prior to 19.2R1-S2, 19.2R2.

This issue does not affect Juniper Networks Junos OS versions prior to 17.2R1.

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

This issue was seen during production usage.

This issue has been assigned CVE-2020-1608.

Solution:

The following software releases have been updated to resolve this specific issue: 17.2R3-S3, 17.3R2-S5, 17.3R3-S5, 17.4R2-S7, 17.4R3, 18.1R3-S6, 18.2R3-S2, 18.2X75-D51, 18.2X75-D60, 18.3R3, 18.4R2, 19.1R1-S3, 19.1R2, 19.2R1-S2, 19.2R2, 19.3R1, and all subsequent releases.

This issue is being tracked as 1432957.

Workaround:

There are no known workarounds for this issue.

Implementation:
Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/.
Modification History:
2020-01-08: Initial Publication.
2020-01-14: Update on affected releases for 17.3, 17.4, 18.1, 18.2.
2020-02-13: Title & Description update about type of packet.
CVSS Score:
7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Severity Level:
High

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