Through routine static code analysis of the Juniper Networks Junos OS software codebase, the Secure Development Life Cycle team identified a Use After Free vulnerability in PFE packet processing on the QFX10002-60C switching platform. Exploitation of this vulnerability may allow a logically adjacent attacker to trigger a Denial of Service (DoS). Continued exploitation of this vulnerability will sustain the Denial of Service (DoS) condition.

This issue only affects QFX10002-60C devices. No other product or platform is vulnerable to this issue.

This issue affects Juniper Networks Junos OS on QFX10002-60C:

• 19.1 version 19.1R3-S1 and later versions;
• 19.1 versions prior to 19.1R3-S3;
• 19.2 version 19.2R2 and later versions;
• 19.2 versions prior to 19.2R3-S1;
• 20.2 versions prior to 20.2R1-S2.

This issue does not affect Juniper Networks Junos OS:

• versions prior to 19.1R3;
• 19.2 versions prior to 19.2R2;
• any version of 19.3;
• version 20.2R2 and later releases.

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

This issue was found during internal product security testing.

This issue has been assigned  CVE-2021-0262 .
 

The following software releases have been updated to resolve this specific issue: Junos OS 19.1R3-S3, 19.2R3-S1, 20.2R1-S2, and all subsequent releases.

This issue is being tracked as  1519453 .
 

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

2021-04-14: Initial Publication.

• KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process [juniper.net]
• KB16765: In which releases are vulnerabilities fixed? [juniper.net]
• KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories [juniper.net]
• Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team
• CVE-2021-0262 at cve.mitre.org