Product Affected

This issue affects Junos OS 17.3, 17.4, 18.1, 18.2, 18.3, 18.4, 19.1, 19.2, 19.3, 19.4, 20.1, 20.2, 20.3, 20.4. Affected platforms: EX9200 Series, MX Series.
Medium
6.5 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Problem

A vulnerability in the processing of specific MPLS packets in Juniper Networks Junos OS on MX Series, EX9200 Series with Trio-based MPC (Modular Port Concentrator) may cause FPC to crash and lead to a Denial of Service (DoS) condition. Continued receipt of this packet will sustain the Denial of Service (DoS) condition.

This issue affects MX Series and EX9200 Series with Trio-based PFEs (Packet Forwarding Engines).

This issue affects Juniper Networks Junos OS on MX Series, EX9200 Series:

  • 17.3 versions prior to 17.3R3-S12;
  • 17.4 versions prior to 17.4R2-S13, 17.4R3-S5;
  • 18.1 versions prior to 18.1R3-S13;
  • 18.2 versions prior to 18.2R3-S8;
  • 18.3 versions prior to 18.3R3-S5;
  • 18.4 versions prior to 18.4R2-S8, 18.4R3-S8;
  • 19.1 versions prior to 19.1R3-S5;
  • 19.2 versions prior to 19.2R3-S2;
  • 19.3 versions prior to 19.3R2-S6, 19.3R3-S3;
  • 19.4 versions prior to 19.4R1-S4, 19.4R2-S4, 19.4R3-S2;
  • 20.1 versions prior to 20.1R3;
  • 20.2 versions prior to 20.2R2-S2, 20.2R3;
  • 20.3 versions prior to 20.3R2;
  • 20.4 versions prior to 20.4R2;


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-2021-0288 .
 

Solution

The following software releases have been updated to resolve this specific issue: Junos OS 17.3R3-S12, 17.4R2-S13, 17.4R3-S5, 18.1R3-S13, 18.2R3-S8, 18.3R3-S5, 18.4R2-S8, 18.4R3-S8, 19.1R3-S5, 19.2R3-S2, 19.3R2-S6, 19.3R3-S3, 19.4R2-S4, 19.4R3-S2, 20.1R3, 20.2R2-S2, 20.2R3, 20.3R2, 20.4R2, 21.1R1, and all subsequent releases.

This issue is being tracked as 1556576 .
 

Software releases or updates are available for download at https://support.juniper.net/support/downloads/
 

Workaround

There are no viable workarounds for this issue.
 

Severity Assessment

Information for how Juniper Networks uses CVSS can be found at KB 16446 [juniper.net] "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."

Modification History

2021-07-14: Initial Publication.

Related Information