Track vulnerabilities like this one. Sign up free to get alerted when software you use is affected.
5.9

Juniper SRX devices may let any TCP traffic through

CVE-2018-0009 · published 8 years ago
Summary

Certain versions of Juniper's Junos operating system on SRX firewalls treat custom application identifiers that start with zeros as a match for all TCP traffic. This can let traffic that should be blocked pass through the firewall. Upgrade to the latest Junos release for your SRX model or apply the vendor's recommended patch to correct the rule handling.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
juniper junos 12.1x46
12.3x48
15.1x49
cpe:2.3:o:juniper:junos:12.1x46:*:*:*:*:*:*:*
Original advisory text
On Juniper Networks SRX series devices, firewall rules configured to match custom application UUIDs starting with zeros can match all TCP traffic. Due to this issue, traffic that should have been b...
On Juniper Networks SRX series devices, firewall rules configured to match custom application UUIDs starting with zeros can match all TCP traffic. Due to this issue, traffic that should have been blocked by other rules is permitted to flow through the device resulting in a firewall bypass condition. Affected releases are Juniper Networks Junos OS: 12.1X46 versions prior to 12.1X46-D71 on SRX series; 12.3X48 versions prior to 12.3X48-D55 on SRX series; 15.1X49 versions prior to 15.1X49-D100 on SRX series.
References
Fix within
Internet-facing 14 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically (estimated)
  • Gives an attacker partial control (estimated)
Severity
5.9 Medium
Exploitation
1% chance of attack within 30 days
Timeline
Published10 Jan 2018
Updated31 Oct 2026
First seen29 Sep 2026
Sources
CVE-2018-0009 · NVD
Track software like this
Free during beta