2018-01 Security Bulletin: SRX Series: Firewall bypass vulnerability when UUID with leading zeros is configured. (CVE-2018-0009)

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Product Affected:
This issue affects Junos OS 12.1X46, 12.3X48, 15.1X49. Affected platforms: SRX series.
Problem:

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.

This issue is only applicable to SRX series devices with a custom application configuration containing UUIDs that start with one or more zeros.

Example 1:

set applications application <application-name> uuid 01234567-1234-1234-1234-123456789abc

Example 2:

set applications application <application-name> term <term-name> uuid 01234567-1234-1234-1234-123456789abc

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

This issue was seen in a production network.

This issue has been assigned CVE-2018-0009.

Solution:

The following software releases have been updated to resolve this specific issue: 12.1X46-D71, 12.3X48-D55, 15.1X49-D100, 17.3R1, and all subsequent releases.

This issue is being tracked as 1261522 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).

Workaround:
Do not use UUIDs starting with zeros in the configuration.
Implementation:
Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/.
Modification History:
2018-01-10: Initial publication
Related Links:
CVSS Score:
5.4 (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N)
Risk Level:
Medium
Risk Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."