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zdiSteven Seeley (mr_me) of Source InciteZDI-20-003
HistoryJan 03, 2020 - 12:00 a.m.

Cisco Data Center Network Manager TrustedClientTokenValidator Hard-coded Cryptographic Key Authentication Bypass Vulnerability

2020-01-0300:00:00
Steven Seeley (mr_me) of Source Incite
www.zerodayinitiative.com
9

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

10 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.535 Medium

EPSS

Percentile

97.6%

This vulnerability allows remote attackers to bypass authentication on affected installations of Cisco Data Center Network Manager. The specific flaw exists within the processing of the dbadmin/addUser functionality. The issue results from trusting input that has been encrypted with a hard-coded and discoverable cryptographic key. An attacker can leverage this vulnerability to add new global admins to the system.

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

10 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.535 Medium

EPSS

Percentile

97.6%