CVE-2018-0017 SRX Series: Denial of service vulnerability in flowd daemon on devices configured with NAT-PT

What is CVE-2018-0017?

CVE-2018-0017 is a high-severity denial of service vulnerability in Juniper Junos, published on 11 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the Network Address Translation - Protocol Translation (NAT-PT) feature of Junos OS on SRX series devices may allow a certain valid IPv6 packet to crash the flowd daemon. Repeated crashes of the flowd daemon can result in an extended denial of service condition for the SRX device. Affected releases are Juniper Networks Junos OS: 12.1X46 versions prior to 12.1X46-D72; 12.3X48 versions prior to 12.3X48-D55; 15.1X49 versions prior to 15.1X49-D90.

Weakness: CWE-20

Which versions are affected by CVE-2018-0017?

It affects 1 product.

Products include Juniper Junos.

How do I fix CVE-2018-0017?

No fix has been published for CVE-2018-0017 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2018-0017 being exploited?

There is no known exploitation of CVE-2018-0017 in the wild and no public exploit code.

Other vulnerabilities in Juniper Junos

• CVE-2023-36845 Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Exploited Critical 9.8
• CVE-2020-1631 Juniper Junos OS Path Traversal Exploited High 8.8
• CVE-2025-21590 Juniper Junos OS Improper Isolation or Compartmentalization Exploited Medium 6.7
• CVE-2023-36851 Juniper Junos OS SRX Series Missing Authentication for Critical Function Exploited Medium 5.3
• CVE-2023-36844 Juniper Junos OS EX Series PHP External Variable Modification Exploited Medium 5.3

All Juniper Junos vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-f925-p85f-x8m2.