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Juniper Junos OS: 2021-04 Security Bulletin: Junos OS: J-Web can be compromised through reflected client-side HTTP parameter pollution attacks. (JSA11160) (CVE-2021-0269)

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Juniper Junos OS: 2021-04 Security Bulletin: Junos OS: J-Web can be compromised through reflected client-side HTTP parameter pollution attacks. (JSA11160) (CVE-2021-0269)

Severity
5
CVSS
(AV:N/AC:H/Au:N/C:P/I:P/A:P)
Published
04/16/2021
Created
04/16/2021
Added
04/16/2021
Modified
05/06/2021

Description

The improper handling of client-side parameters in J-Web of Juniper Networks Junos OS allows an attacker to perform a number of different malicious actions against a target device when a user is authenticated to J-Web. An attacker may be able to supersede existing parameters, including hardcoded parameters within the HTTP/S session, access and exploit variables, bypass web application firewall rules or input validation mechanisms, and otherwise alter and modify J-Web's normal behavior. An attacker may be able to transition victims to malicious web services, or exfiltrate sensitive information from otherwise secure web forms. This issue affects: Juniper Networks Junos OS: All versions prior to 17.4R3-S3; 18.1 versions prior to 18.1R3-S12; 18.2 versions prior to 18.2R3-S6; 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R3-S6; 19.1 versions prior to 19.1R3-S4; 19.2 versions prior to 19.2R3-S1; 19.3 versions prior to 19.3R3-S1; 19.4 versions prior to 19.4R2-S2, 19.4R3; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2.

Solution(s)

  • juniper-junos-os-upgrade-latest

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