azure-umqtt-c vulnerable to denial-of-service (DoS)


azure-umqtt-c contains a denial-of-service (DoS) vulnerability (CWE-400).

Masataka Sakaguchi, Bintatsu Noda and Hisashi Kojima of FUJITSU LABORATORIES LTD. 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 7.5 (High) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: High
CVSS V2 Severity:
Base Metrics 5.0 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Partial
Affected Products

Microsoft Japan Co., Ltd.
  • azure-umqtt-c that was available through GitHub prior to 2017 October 6


An attacker may be able to cause a denial-of-service (DoS).

[Apply the update]
Update azure-umqtt-c according to the information provided by the developer.
Vendor Information

Microsoft Japan Co., Ltd.
CWE (What is CWE?)

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

  1. CVE-2019-5917

  1. JVN : JVN#05875753
  2. National Vulnerability Database (NVD) : CVE-2019-5917
Revision History

  • [2019/02/20]
      Web page was published
  • [2019/09/27]
      References : Content was added