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mscveMicrosoftMS:CVE-2020-16904
HistoryOct 13, 2020 - 7:00 a.m.

Azure Functions Elevation of Privilege Vulnerability

2020-10-1307:00:00
Microsoft
msrc.microsoft.com
15

7.5 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

0.002 Low

EPSS

Percentile

56.5%

An elevation of privilege vulnerability exists in the way Azure Functions validate access keys.

An unauthenticated attacker who successfully exploited this vulnerability could invoke an HTTP Function without proper authorization.

This security update addresses the vulnerability by correctly validating access keys used to access HTTP Functions.

7.5 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

0.002 Low

EPSS

Percentile

56.5%

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