10.0
CRITICAL
CVE-2021-1388
"Cisco ACI Multi-Site Orchestrator (MSO) API Authentication Bypass Vulnerability"
Description

A vulnerability in an API endpoint of Cisco ACI Multi-Site Orchestrator (MSO) installed on the Application Services Engine could allow an unauthenticated, remote attacker to bypass authentication on an affected device. The vulnerability is due to improper token validation on a specific API endpoint. An attacker could exploit this vulnerability by sending a crafted request to the affected API. A successful exploit could allow the attacker to receive a token with administrator-level privileges that could be used to authenticate to the API on affected MSO and managed Cisco Application Policy Infrastructure Controller (APIC) devices.

INFO

Published Date :

Feb. 24, 2021, 8:15 p.m.

Last Modified :

Nov. 7, 2023, 3:28 a.m.

Remotely Exploitable :

Yes !

Impact Score :

6.0

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2021-1388 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Cisco application_policy_infrastructure_controller
2 Cisco aci_multi-site_orchestrator
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-1388.

URL Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-mso-authbyp-bb5GmBQv Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-1388 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-1388 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Removed CVSS V3 Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    Added CVSS V3.1 Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
  • Reanalysis by [email protected]

    Aug. 05, 2022

    Action Type Old Value New Value
    Added CWE NIST NVD-CWE-Other
  • Initial Analysis by [email protected]

    Mar. 02, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:C/I:C/A:C)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-mso-authbyp-bb5GmBQv No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-mso-authbyp-bb5GmBQv Vendor Advisory
    Added CPE Configuration OR *cpe:2.3:a:cisco:aci_multi-site_orchestrator:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 3.0\(3m\) *cpe:2.3:a:cisco:application_policy_infrastructure_controller:3.0\(3i\):*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-1388 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-1388 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

2.60 }} 0.24%

score

0.89150

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
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Scope
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