CVE-2021-31384

Summary

Due to a Missing Authorization weakness and Insufficient Granularity of Access Control in a specific device configuration, a vulnerability exists in Juniper Networks Junos OS on SRX Series whereby an attacker who attempts to access J-Web administrative interfaces can successfully do so from any device interface regardless of the web-management configuration and filter rules which may otherwise protect access to J-Web. This issue affects: Juniper Networks Junos OS SRX Series 20.4 version 20.4R1 and later versions prior to 20.4R2-S1, 20.4R3; 21.1 versions prior to 21.1R1-S1, 21.1R2. This issue does not affect Juniper Networks Junos OS versions prior to 20.4R1.

Affected Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OSunspecified < 20.4R1unaffected
Juniper NetworksJunos OS20.4R1 < 20.4*affected
Juniper NetworksJunos OS21.1 < 21.1R1-S1, 21.1R2affected

Weaknesses

  • CWE-285: CWE-285: Improper Authorization
  • CWE-862: CWE-862: Missing Authorization
  • CWE-551: CWE-551: Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
  • CWE-939: CWE-939: Improper Authorization in Handler for Custom URL Scheme
  • CWE-1220: CWE-1220: Insufficient Granularity of Access Control

Workarounds

There are no viable workarounds for this issue other than disabling J-Web.

ADP Enrichment

CVE Program Container

Additional References

References