CVE-2020-7293: McAfee Security Bulletin - Web Gateway update fixes six vulnerabilities (CVE-2020-7292, CVE-2020-7293, CVE-2020-7294, CVE-2020-7295, CVE-2020-7296, and CVE-2020-7297)

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Product:

Impacted Versions:

CVE ID:

Impact of Vulnerabilities:

Severity Ratings:

CVSS v3.1
Base/Temporal Scores:

McAfee Web Gateway (MWG)

9.x earlier than 9.2.1
8.2.x earlier than 8.2.9
7.8.x earlier than 7.8.2.22

CVE-2020-7292

Inappropriate Encoding for output context (CWE-838)

Medium

4.3 / 3.9

MWG

9.x earlier than 9.2.3
8.2.x earlier than 8.2.11,
7.8.x earlier than 7.8.2.23

CVE-2020-7293

Improper Authorization (CWE-285)

Critical

9.0 / 8.1

MWG

9.x earlier than 9.2.3
8.2.x earlier than 8.2.11,
7.8.x earlier than 7.8.2.23

CVE-2020-7294

Improper Authorization (CWE-285)

Medium

4.6 / 4.2

MWG

9.x earlier than 9.2.3
8.2.x earlier than 8.2.11,
7.8.x earlier than 7.8.2.23

CVE-2020-7295

Improper Authorization (CWE-285)

Low

3.5 / 3.2

MWG

9.x earlier than 9.2.3
8.2.x earlier than 8.2.11,
7.8.x earlier than 7.8.2.23

CVE-2020-7296

Improper Authorization (CWE-285)

Medium

5.7 / 5.1

MWG

9.x earlier than 9.2.3
8.2.x earlier than 8.2.11,
7.8.x earlier than 7.8.2.23

CVE-2020-7297

Improper Authorization (CWE-285)

Low

3.5 / 3.2

Recommendations:

Install or update to the MWG versions in the Remediation section

Security Bulletin Replacement:

None

Location of updated software:

https://contentsecurity.mcafee.com/

Article contents:

• Vulnerability Description
• Remediation
• Acknowledgments
• Frequently Asked Questions (FAQs)
• Resources
• Disclaimer

Vulnerability Description

1. CVE-2020-7292
   Inappropriate Encoding for output context vulnerability in McAfee Web Gateway (MWG) prior to 9.2.1 allows a remote attacker to cause MWG to return an ambiguous redirect response via getting a user to click on a malicious URL.
   https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-7292
   https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-7292

2. CVE-2020-7293
   Privilege Escalation vulnerability in McAfee Web Gateway (MWG) prior to 9.2.3 allows authenticated user interface user with low permissions to change the system’s root password via improper access controls in the user interface.
   https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-7293
   https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-7293

3. CVE-2020-7294
   Privilege Escalation vulnerability in McAfee Web Gateway (MWG) prior to 9.2.3 allows authenticated user interface user to delete or download protected files via improper access controls in the REST interface.
   https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-7294
   https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-7294

4. CVE-2020-7295
   Privilege Escalation vulnerability in McAfee Web Gateway (MWG) prior to 9.2.3 allows authenticated user interface user to delete or download protected log data via improper access controls in the user interface.
   https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-7295
   https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-7295

5. CVE-2020-7296
   Privilege Escalation vulnerability in McAfee Web Gateway (MWG) prior to 9.2.3 allows authenticated user interface user to access protected configuration files via improper access control in the user interface.
   https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-7296
   https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-7296

6. CVE-2020-7297
   Privilege Escalation vulnerability in McAfee Web Gateway (MWG) prior to 9.2.3 allows authenticated user interface user to access protected dashboard data via improper access control in the user interface.
   https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-7297
   https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-7297

Remediation
To remediate this issue, go to the Product Downloads site, and download the applicable product update file:

Product

Version

Type

File Name

Release Date

CVE-2020-7292:

MWG

9.2.1 and later

Controlled Release

mwgappl-9.2.1-33185-x.86_64.iso

July 14, 2020

MWG

8.2.9 and later

Main Release

mwgappl-8.2.9-33163.x.86_64.iso

July 14, 2020

MWG

7.8.2.22 and later

Main Release

mwgappl-7.8.2.22.0-33162-x.86_64.iso

July 14, 2020

CVE-2020-7293, CVE-2020-7294, CVE-2020-7295, CVE-2020-7296, and CVE-2020-7297:

MWG

9.2.3 and later

Main Release

mwgappl-9.2.3-33856-x.86_64.iso

September 8, 2020

MWG

8.2.11 and later

Main Release

mwgappl-8.2.11- 33661.x.86_64.iso

August 19, 2020

MWG

7.8.2.23 and later

Main Release

mwgappl-7.8.2.23.0–3846x.86_64.iso

September 8, 2020

Download and Installation Instructions
All documentation and software relating to MWG releases can be found on https://contentsecurity.mcafee.com/.
Acknowledgments
McAfee credits

Thiện Phạm

from Techlab Corporation for reporting CVE-2020-7292.
McAfee credits jtsec - https://www.jtsec.es/ for reporting CVE-2020-7295, CVE-2020-7296, and CVE-2020-7297.
Frequently Asked Questions (FAQs)
How do I know if my McAfee product is vulnerable or not?
Use the following instructions for MWG:

1. Open the Administrator’s User Interface (UI).
2. Log on.
3. If the product version number displayed is older than the versions specified in the Remediation table above, it is vulnerable.

What is CVSS?
CVSS, or Common Vulnerability Scoring System, is the result of the National Infrastructure Advisory Council’s effort to standardize a system of assessing the criticality of a vulnerability. This system offers an unbiased criticality score between 0 and 10 that customers can use to judge how critical a vulnerability is and plan accordingly. For more information, visit the CVSS website at: https://www.first.org/cvss/.

When calculating CVSS scores, McAfee has adopted a philosophy that fosters consistency and repeatability. Our guiding principle for CVSS scoring is to score the exploit under consideration by itself. We consider only the immediate and direct impact of the exploit under consideration. We do not factor into a score any potential follow-on exploits that might be made possible by the successful exploitation of the issue being scored.

What are the CVSS scoring metrics?

1. CVE-2020-7292: MWG inappropriate encoding for output context vulnerability

**Base Score**

**4.3**

Attack Vector (AV)

Network (N)

Attack Complexity (AC)

Low (L)

Privileges Required (PR)

None (N)

User Interaction (UI)

Required (R)

Scope (S)

Unchanged (U)

Confidentiality (C)

None (N)

Integrity (I)

Low (L)

Availability (A)

None (N)

**Temporal Score (Overall)**

**3.9**

Exploitability (E)

Proof of Concept (P)

Remediation Level (RL)

Official Fix (O)

Report Confidence (RC)

Confirmed (C)

   
**NOTE:** The below CVSS version 3.1 vector was used to generate this score.  
https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C&version=3.1  

2. CVE-2020-7293:

**Base Score**

**9.0**

Attack Vector (AV)

Adjacent (A)

Attack Complexity (AC)

Low (L)

Privileges Required (PR)

Low (L)

User Interaction (UI)

None (N)

Scope (S)

Changed (C)

Confidentiality (C)

High (H)

Integrity (I)

High (H)

Availability (A)

High (H)

**Temporal Score (Overall)**

**8.1**

Exploitability (E)

Proof of concept (P)

Remediation Level (RL)

Official Fix (O)

Report Confidence (RC)

Confirmed (C)

   
**NOTE:** The below CVSS version 3.1 vector was used to generate this score.  
https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C&version=3.1  

3. CVE-2020-7294: MWG REST API privilege escalation vulnerability

**Base Score**

**4.6**

Attack Vector (AV)

Adjacent (A)

Attack Complexity (AC)

Low (L)

Privileges Required (PR)

Low (L)

User Interaction (UI)

None (N)

Scope (S)

Unchanged (U)

Confidentiality (C)

Low (L)

Integrity (I)

Low (L)

Availability (A)

None (N)

**Temporal Score (Overall)**

**4.2**

Exploitability (E)

Proof of Concept

Remediation Level (RL)

Official Fix (O)

Report Confidence (RC)

Confirmed (C)

   
**NOTE:** The below CVSS version 3.1 vector was used to generate this score.  
https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C&version=3.1  

4. CVE-2020-7295: MWG user interface privilege escalation vulnerability

**Base Score**

**3.5**

Attack Vector (AV)

Adjacent (A)

Attack Complexity (AC)

Low (L)

Privileges Required (PR)

Low (L)

User Interaction (UI)

None (N)

Scope (S)

Unchanged (U)

Confidentiality (C)

None (N)

Integrity (I)

Low (L)

Availability (A)

None (N)

**Temporal Score (Overall)**

**3.2**

Exploitability (E)

Proof of Concept (P)

Remediation Level (RL)

Official Fix (O)

Report Confidence (RC)

Confirmed (C)

   
**NOTE:** The below CVSS version 3.1 vector was used to generate this score.  
https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C&version=3.1  

5. CVE-2020-7296: MWG user interface privilege escalation vulnerability

**Base Score**

**5.7**

Attack Vector (AV)

Adjacent (A)

Attack Complexity (AC)

Low (L)

Privileges Required (PR)

Low (L)

User Interaction (UI)

None (N)

Scope (S)

Unchanged (U)

Confidentiality (C)

High (H)

Integrity (I)

None (N)

Availability (A)

None (N)

**Temporal Score (Overall)**

**5.1**

Exploitability (E)

Proof of Concept (P)

Remediation Level (RL)

Official Fix (O)

Report Confidence (RC)

Confirmed (C)

   
**NOTE:** The below CVSS version 3.1 vector was used to generate this score.  
https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C&version=3.1  

6. CVE-2020-7297: MWG user interface privilege escalation vulnerability

**Base Score**

**3.5**

Attack Vector (AV)

Adjacent (A)

Attack Complexity (AC)

Low (L)

Privileges Required (PR)

Low (L)

User Interaction (UI)

None (N)

Scope (S)

Unchanged (U)

Confidentiality (C)

Low (L)

Integrity (I)

None (N)

Availability (A)

None (N)

**Temporal Score (Overall)**

**3.2**

Exploitability (E)

Proof of Concept (P)

Remediation Level (RL)

Official Fix (O)

Report Confidence (RC)

Confirmed (C)

   
**NOTE:** The below CVSS version 3.1 vector was used to generate this score.  
https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C&version=3.1

Where can I find a list of all Security Bulletins?
All Security Bulletins are published on our external PSIRT website at https://www.mcafee.com/us/threat-center/product-security-bulletins.aspx > Security Bulletins. Security Bulletins are retired (removed) once a product is both End of Sale and End of Support (End of Life).

How do I report a product vulnerability to McAfee?
If you have information about a security issue or vulnerability with a McAfee product, visit the McAfee PSIRT website for instructions at https://www.mcafee.com/us/threat-center/product-security-bulletins.aspx > Report a Security Vulnerability.

How does McAfee respond to this and any other reported security flaws?
Our key priority is the security of our customers. If a vulnerability is found within any McAfee software or services, we work closely with the relevant security software development team to ensure the rapid and effective development of a fix and communication plan.

McAfee only publishes Security Bulletins if they include something actionable such as a workaround, mitigation, version update, or hotfix. Otherwise, we would simply be informing the hacker community that our products are a target, putting our customers at greater risk. For products that are updated automatically, a non-actionable Security Bulletin might be published to acknowledge the discoverer.

View our PSIRT policy on the McAfee PSIRT website at https://www.mcafee.com/us/threat-center/product-security-bulletins.aspx > About PSIRT.
Resources
To contact Technical Support, log on to the ServicePortal and go to the Create a Service Request page at https://support.mcafee.com/ServicePortal/faces/serviceRequests/createSR:

• If you are a registered user, type your User ID and Password, and then click Log In.
• If you are not a registered user, click Register and complete the required fields. Your password and logon instructions will be emailed to you.

Disclaimer

The information provided in this Security Bulletin is provided as is without warranty of any kind. McAfee disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall McAfee or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if McAfee or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the preceding limitation may not apply.

Any future product release dates mentioned in this Security Bulletin are intended to outline our general product direction, and they should not be relied on in making a purchasing decision. The product release dates are for information purposes only, and may not be incorporated into any contract. The product release dates are not a commitment, promise, or legal obligation to deliver any material, code, or functionality. The development, release, and timing of any features or functionality described for our products remains at our sole discretion and may be changed or canceled at any time.