"Hulu" App for Android uses a hard-coded API key for an external service


"Hulu" App for Android provided by HJ Holdings, Inc. uses a hard-coded API key for an external service (CWE-798).

Ryo Sato of BroadBand Security, Inc. reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 4.0 (Medium) [IPA Score]
  • Attack Vector: Local
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: Low
  • Integrity Impact: None
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 2.1 (Low) [IPA Score]
  • Access Vector: Local
  • Access Complexity: Low
  • Authentication: None
  • Confidentiality Impact: Partial
  • Integrity Impact: None
  • Availability Impact: None
Affected Products

HJ Holdings, Inc.
  • Hulu App for Android version 3.0.47 or later, and prior to 3.1.2


The hard-coded API key may be retrieved via reverse-engineering the application binary.
Note that the application users are not directly affected by this vulnerability.

The hard-coded API key has been revoked by the developer on June 7, 2022 and this vulnerability is not exploitable now.
The developer has released "Hulu" App for Android version 3.1.2 without any API key hard-coded.
Vendor Information

HJ Holdings, Inc.
CWE (What is CWE?)

  1. No Mapping(CWE-Other) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2022-35734

  1. JVN : JVN#40907489
Revision History

  • [2022/07/28]
      Web page was published