A vulnerability in the HTTP/HTTPS service used by J-Web, Web Authentication, Dynamic-VPN (DVPN), Firewall Authentication Pass-Through with Web-Redirect, and Captive Portal allows an unauthenticated attacker to cause an extended Denial of Service (DoS) for these services by sending a high number of specific requests. This issue affects: Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S17 on EX Series.

12.3X48 versions prior to 12.3X48-D105 on SRX Series.

15.1 versions prior to 15.1R7-S8.

15.1X49 versions prior to 15.1X49-D230 on SRX Series.

16.1 versions prior to 16.1R7-S8.

17.4 versions prior to 17.4R2-S12, 17.4R3-S3.

18.1 versions prior to 18.1R3-S11.

18.2 versions prior to 18.2R3-S6.

18.3 versions prior to 18.3R2-S4, 18.3R3-S3.

18.4 versions prior to 18.4R2-S5, 18.4R3-S4.

19.1 versions prior to 19.1R2-S2, 19.1R3-S2.

19.2 versions prior to 19.2R1-S5, 19.2R3.

19.3 versions prior to 19.3R2-S4, 19.3R3.

19.4 versions prior to 19.4R1-S3, 19.4R2-S2, 19.4R3.

20.1 versions prior to 20.1R1-S3, 20.1R2.

20.2 versions prior to 20.2R1-S1, 20.2R2.