CVE-2021-0269 (GCVE-0-2021-0269)

Vulnerability from cvelistv5 – Published: 2021-04-22 19:37 – Updated: 2024-09-17 01:12
VLAI?
Title
Junos OS: J-Web can be compromised through reflected client-side HTTP parameter pollution attacks.
Summary
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.
Severity ?
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • CWE-233 - Improper Handling of Parameters
Assigner
References
Impacted products
Vendor Product Version
Juniper Networks Junos OS Affected: unspecified , < 17.4R3-S3 (custom)
Affected: 18.1 , < 18.1R3-S12 (custom)
Affected: 18.2 , < 18.2R3-S6 (custom)
Affected: 18.3 , < 18.3R3-S4 (custom)
Affected: 18.4 , < 18.4R3-S6 (custom)
Affected: 19.1 , < 19.1R3-S4 (custom)
Affected: 19.2 , < 19.2R3-S1 (custom)
Affected: 19.3 , < 19.3R3-S1 (custom)
Affected: 19.4 , < 19.4R2-S2, 19.4R3 (custom)
Affected: 20.1 , < 20.1R2 (custom)
Affected: 20.2 , < 20.2R2 (custom)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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