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2020-07 Security Bulletin: Junos OS: MX Series: Denial of Service vulnerability in MS-PIC component on MS-MIC or MS-MPC (CVE-2020-1650)

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Article ID: JSA11037 SECURITY_ADVISORIES Last Updated: 08 Jul 2020Version: 1.0
Product Affected:
This issue affects Junos OS 17.2, 17.3, 17.4, 18.1, 18.2, 18.3, 18.4, 19.1, 19.2, 19.3. Affected platforms: MX Series.
Problem:

On Juniper Networks Junos MX Series with service card configured, receipt of a stream of specific packets may crash the MS-PIC component on MS-MIC or MS-MPC.

By continuously sending these specific packets, an attacker can repeatedly bring down MS-PIC on MS-MIC/MS-MPC causing a prolonged Denial of Service.

This issue affects MX Series devices using MS-PIC, MS-MIC or MS-MPC service cards with any service configured.

This issue affects Juniper Networks Junos OS on MX Series:

17.2R2-S7;

17.3R3-S4, 17.3R3-S5;

17.4R2-S4 and the subsequent SRs (17.4R2-S5, 17.4R2-S6, etc.);

17.4R3;

18.1R3-S3, 18.1R3-S4, 18.1R3-S5, 18.1R3-S6, 18.1R3-S7, 18.1R3-S8;

18.2R3, 18.2R3-S1, 18.2R3-S2;

18.3R2 and the SRs based on 18.3R2;

18.4R2 and the SRs based on 18.4R2;

19.1R1 and the SRs based on 19.1R1;

19.2R1 and the SRs based on 19.2R1;

19.3R1 and the SRs based on 19.3R1.

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-2020-1650.

Solution:

The following software releases have been updated to resolve this specific issue: 17.2R2-S8, 17.3R3-S6, 17.4R3-S1, 18.1R3-S9, 18.2R3-S3, 18.3R3, 18.4R3, 19.1R2, 19.2R2, 19.3R2, 19.4R1, and all subsequent releases.

This issue is being tracked as 1453811.

Workaround:

There are no known workarounds for this issue.

Implementation:
Software releases or updates are available for download at https://www.juniper.net/support/downloads/.
Modification History:
‚Äč2020-07-08: Initial publication
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:
Medium
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."

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