The vMX Series software uses a predictable IP ID Sequence Number. This leaves the system as well as clients connecting through the device susceptible to a family of attacks which rely on the use of predictable IP ID sequence numbers as their base method of attack.

This issue was found during internal product security testing.

Affected releases are Juniper Networks Junos OS:

• 15.1 versions prior to 15.1F5 on vMX Series.

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

This issue was found during internal product security testing or research.

This issue has been assigned CVE-2019-0007 .

The following software releases have been updated to resolve this specific issue: 15.1F5, and all subsequent releases.

This issue is being tracked as PR 1140895 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).

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

When used in whole, the following workaround methods may reduce the risk of information exfiltration from the customer environment, and reduce the chance of being subjected to, or propagating D/DoS attacks against other targets.

Deny incoming packets with invalid source addresses From reaching the device.

Utilize egress filtering to prevent invalid / spoofed packets from leaving your network(s).

Enable stateful firewall filters where possible.

Utilize SYN-based anti-flood protection mechanisms where possible to reduce or avoid D/DoS attacks.

• 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-2019-0007 at cve.mitre.org