CVE-2021-0261 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://kb.juniper.net/JSA11152

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5