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2018-07 Security Bulletin: Junos OS: SRX Series: Credentials exposed when using HTTP and HTTPS Firewall Pass-through User Authentication (CVE-2018-0025)

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Product Affected:
Junos OS
When an SRX Series device is configured to use HTTP/HTTPS pass-through authentication services, a client sending authentication credentials in the initial HTTP/HTTPS session is at risk that these credentials may be captured during follow-on HTTP/HTTPS requests by a malicious actor through a man-in-the-middle attack or by authentic servers subverted by malicious actors.

FTP, and Telnet pass-through authentication services are not affected.

Affected releases are Juniper Networks SRX Series:
12.1X46 versions prior to 12.1X46-D67 on SRX Series;
12.3X48 versions prior to 12.3X48-D25 on SRX Series;
15.1X49 versions prior to 15.1X49-D35 on SRX Series.

For further information on configuration stanza please refer to the URLs below.

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue was seen during production usage.
This issue has been assigned CVE-2018-0025.


The following software releases have been updated to resolve this specific issue: Junos OS:12.1X46-D67, 12.3X48-D25, 15.1X49-D35, 17.3R1 all subsequent releases.
This issue is being tracked as PR 1122278 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).

1. Discontinue use of HTTP/HTTPS Pass-through Firewall User Authentication
2. Use web-redirect when using Pass-through Firewall User Authentication

set security policies from-zone * to-zone * policy * then permit firewall-authentication pass-through web-redirect
For additional configuration guidance, customers should contact JTAC Support.
Software Releases, patches and updates are available at
Modification History:
2018-07-11: Initial Publication.
Related Links:
CVSS Score:
6.1 (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N)
Severity Level:
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."