CVE-2020-17002 — Azure SDK for C Security Feature Bypass Vulnerability

Executive Summary

None

Overview

7.4

CVSS HIGH

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Security Feature Bypass

Released Dec 8 2020

Last Updated Dec 8 2020

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.03233 — 0.86949 percentile

NVD CVSS 7.4 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C

ATTACK VECTOR

Network

ATTACK COMPLEXITY

High

PRIVILEGES REQUIRED

None

USER INTERACTION

None

SCOPE

Unchanged

CONFIDENTIALITY

High

INTEGRITY

High

AVAILABILITY

None

EXPLOIT CODE MATURITY

Unproven

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 6.4

EPSS Score

0.03233

probability of exploitation in the next 30 days

0.86949 percentile - updated 2026-07-25

View on FIRST.org

Affected Products

18 affected products

Product	KB Article	Severity	Impact	Restart Required
azure-c-shared-utility	`Release Notes (Security Update)`	Important	Security Feature Bypass	Maybe
Azure-c-shared-utility Release LTS_02_2020_Ref02	`Release Notes (Security Update)`	Important	Security Feature Bypass	Maybe
Azure-c-shared-utility Release LTS_07_2020_Ref02	`Release Notes (Security Update)`	Important	Security Feature Bypass	Maybe
azure-uamqp-c	`Release Notes (Security Update)`	Important	Security Feature Bypass	Maybe
azure-uamqp-c Release LTS_02_2020_Ref02	`Release Notes (Security Update)`	Important	Security Feature Bypass	Maybe
azure-uamqp-c Release LTS_07_2020_Ref02	`Release Notes (Security Update)`	Important	Security Feature Bypass	Maybe
azure-uhttp-c	`Release Notes (Security Update)`	Important	Security Feature Bypass	Maybe
azure-uhttp-c Release LTS_02_2020_Ref02	`Release Notes (Security Update)`	Important	Security Feature Bypass	Maybe
azure-uhttp-c Release LTS_07_2020_Ref02	`Release Notes (Security Update)`	Important	Security Feature Bypass	Maybe
azure-umqtt-c	`Release Notes (Security Update)`	Important	Security Feature Bypass	Maybe
azure-umqtt-c Release LTS_02_2020_Ref02	`Release Notes (Security Update)`	Important	Security Feature Bypass	Maybe
azure-umqtt-c Release LTS_07_2020_Ref02	`Release Notes (Security Update)`	Important	Security Feature Bypass	Maybe
azure-utpm-c	`Release Notes (Security Update)`	Important	Security Feature Bypass	Maybe
azure-utpm-c Release LTS_02_2020_Ref02	`Release Notes (Security Update)`	Important	Security Feature Bypass	Maybe
azure-utpm-c Release LTS_07_2020_Ref02	`Release Notes (Security Update)`	Important	Security Feature Bypass	Maybe
C SDK for Azure IoT	`Release Notes (Security Update)`	Important	Security Feature Bypass	Maybe
C SDK for Azure IoT Release LTS_02_2020_Ref02	`Release Notes (Security Update)`	Important	Security Feature Bypass	Maybe
C SDK for Azure IoT Release LTS_07_2020_Ref02	`Release Notes (Security Update)`	Important	Security Feature Bypass	Maybe

Patches

1 patch

Article	Type	Restart
`Release Notes`	Security Update	Maybe

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Cristian Pop
Aapo Oksman, Nixu Cybersecurity, https://www.nixu.com/

References

MSRC Advisory MITRE NVD