A heap-based buffer overflow vulnerability in sudo, used in Juniper Secure Analytics, allows an unprivileged locally authenticated user to gain root privileges. This vulnerability is caused by the way sudo parses command line arguments. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
 

This issue affects:

Juniper Networks Juniper Secure Analytics

7.3 versions prior to 7.3.3 FixPack 7 on JSA Series;

7.4 versions prior to 7.4.2 FixPack 2 on JSA Series.
 

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

This issue was discovered during external security research.
 

This issue has been assigned CVE-2021-3156.

The following software releases have been updated to resolve these specific issue: Juniper Secure Analytics 7.3.3 FixPack 7, 7.4.2 FixPack 2, and all subsequent releases.

This issue is being tracked as PR 1571401 which is visible on the Customer Support website.

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).

Implementation

Software Releases, patches and updates are available at https://support.juniper.net/support/downloads/.

2022-04-13: 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-2021-3156 at cve.mitre.org