7.7
HIGH
CVE-2021-21362
MinIO S3 Bypass of Read-Only Policy
Description

MinIO is an open-source high performance object storage service and it is API compatible with Amazon S3 cloud storage service. In MinIO before version RELEASE.2021-03-04T00-53-13Z it is possible to bypass a readOnly policy by creating a temporary 'mc share upload' URL. Everyone is impacted who uses MinIO multi-users. This is fixed in version RELEASE.2021-03-04T00-53-13Z. As a workaround, one can disable uploads with `Content-Type: multipart/form-data` as mentioned in the S3 API RESTObjectPOST docs by using a proxy in front of MinIO.

INFO

Published Date :

March 8, 2021, 7:15 p.m.

Last Modified :

Oct. 21, 2022, 10:40 p.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

4.0

Exploitability Score :

3.1
Affected Products

The following products are affected by CVE-2021-21362 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 Minio minio
: Total Affected Vendor : 1 | Products : 1
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-2021-21362.

URL Resource
https://github.com/minio/minio/commit/039f59b552319fcc2f83631bb421a7d4b82bc482 Patch Third Party Advisory
https://github.com/minio/minio/pull/11682 Exploit Third Party Advisory
https://github.com/minio/minio/releases/tag/RELEASE.2021-03-04T00-53-13Z Release Notes Third Party Advisory
https://github.com/minio/minio/security/advisories/GHSA-hq5j-6r98-9m8v Third Party 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-2021-21362 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-21362 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
  • Reanalysis by [email protected]

    Oct. 21, 2022

    Action Type Old Value New Value
    Added CWE NIST CWE-863
  • Initial Analysis by [email protected]

    Mar. 12, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:N/I:P/A:N)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
    Changed Reference Type https://github.com/minio/minio/commit/039f59b552319fcc2f83631bb421a7d4b82bc482 No Types Assigned https://github.com/minio/minio/commit/039f59b552319fcc2f83631bb421a7d4b82bc482 Patch, Third Party Advisory
    Changed Reference Type https://github.com/minio/minio/pull/11682 No Types Assigned https://github.com/minio/minio/pull/11682 Exploit, Third Party Advisory
    Changed Reference Type https://github.com/minio/minio/releases/tag/RELEASE.2021-03-04T00-53-13Z No Types Assigned https://github.com/minio/minio/releases/tag/RELEASE.2021-03-04T00-53-13Z Release Notes, Third Party Advisory
    Changed Reference Type https://github.com/minio/minio/security/advisories/GHSA-hq5j-6r98-9m8v No Types Assigned https://github.com/minio/minio/security/advisories/GHSA-hq5j-6r98-9m8v Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:a:minio:minio:*:*:*:*:*:*:*:* versions up to (excluding) 2021-03-04t00-53-13z
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-2021-21362 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-2021-21362 weaknesses.

CAPEC-1: Accessing Functionality Not Properly Constrained by ACLs Accessing Functionality Not Properly Constrained by ACLs CAPEC-5: Blue Boxing Blue Boxing CAPEC-13: Subverting Environment Variable Values Subverting Environment Variable Values CAPEC-17: Using Malicious Files Using Malicious Files CAPEC-39: Manipulating Opaque Client-based Data Tokens Manipulating Opaque Client-based Data Tokens CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-51: Poison Web Service Registry Poison Web Service Registry CAPEC-59: Session Credential Falsification through Prediction Session Credential Falsification through Prediction CAPEC-60: Reusing Session IDs (aka Session Replay) Reusing Session IDs (aka Session Replay) CAPEC-76: Manipulating Web Input to File System Calls Manipulating Web Input to File System Calls CAPEC-77: Manipulating User-Controlled Variables Manipulating User-Controlled Variables CAPEC-87: Forceful Browsing Forceful Browsing CAPEC-104: Cross Zone Scripting Cross Zone Scripting CAPEC-127: Directory Indexing Directory Indexing CAPEC-402: Bypassing ATA Password Security Bypassing ATA Password Security CAPEC-647: Collect Data from Registries Collect Data from Registries CAPEC-668: Key Negotiation of Bluetooth Attack (KNOB) Key Negotiation of Bluetooth Attack (KNOB)
Exploit Prediction

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

0.10 }} 0.02%

score

0.41743

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
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