Security Bulletin - Data Exchange Layer Broker (Windows) update fixes "Unquoted service executable path" vulnerability (CVE-2020-7252)
Security Bulletins ID:
SB10307
Last Modified: 2022-05-04 16:51:25 Etc/GMT
Last Modified: 2022-05-04 16:51:25 Etc/GMT
Summary
First Published: February 13, 2020
Article contents: Vulnerability Description
On Windows Server platforms, the DXL Broker service executable resides in a path that contains blank space characters. When the installer installed the service, the service executable path was not enclosed within double quotes. This fact can lead to a denial-of-service, if specially named executables are placed along the folder path.
CVE-2020-7252
Unquoted service executable path in Data Exchange Layer Broker in Data Exchange Layer Framework 6.0.0 and earlier, allows local users to cause a denial-of-service and malicious file execution via carefully crafted and named executable files.
Remediation
To remediate this issue, go to the Product Downloads site, and download the applicable product hotfix file:
Download and Installation Instructions
For instructions to download product updates and hotfixes, see KB56057 - How to download Enterprise product updates and documentation. Review the Release Notes and Installation Guide for instructions on how to install these updates. All documentation is available at our Product Documentation site.
Frequently Asked Questions (FAQs)
How do I know if my product is vulnerable?
For Endpoint products:
Use the following instructions for endpoint or client-based products:
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.
When calculating CVSS scores, we've 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?
CVE-2020-7252: Unquoted service executable path
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:L/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H/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 Knowledge Center. 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 you?
If you have information about a security issue or vulnerability with a product, follow the instructions provided in KB95563 - Report a vulnerability.
How do you 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 of our 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.
We only publish 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.
To view our PSIRT policy, see KB95564 - About PSIRT.
Resources
Disclaimer
The information provided in this Security Bulletin is provided as is without warranty of any kind. We disclaim all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall we or our suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits, or special damages, even if we or our suppliers have been advised of the possibility of such damages. Some states don't 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 shouldn't 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 aren't 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 remain at our sole discretion and may be changed or canceled at any time.
| Impact of Vulnerability: | Denial-of-service (CWE-730, OWASP 2004:A9) Malicious File Execution (CWE-714, OWASP 2004:A3) |
| CVE ID: | CVE-2020-7252 |
| Severity Rating: | Medium |
| CVSS v3 Base/Temporal Scores: | 4.2 / 3.8 |
| Recommendations: | Install or update to Data Exchange Layer (DXL) Broker 6.0.0 Hotfix 1 Install or update to DXL Broker 5.0.2 Hotfix 1 |
| Security Bulletin Replacement: | None |
| Affected Software: | DXL Broker for Windows 6.0.0 and earlier |
| Location of updated software: | Product Downloads site |
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Article contents: Vulnerability Description
On Windows Server platforms, the DXL Broker service executable resides in a path that contains blank space characters. When the installer installed the service, the service executable path was not enclosed within double quotes. This fact can lead to a denial-of-service, if specially named executables are placed along the folder path.
CVE-2020-7252
Unquoted service executable path in Data Exchange Layer Broker in Data Exchange Layer Framework 6.0.0 and earlier, allows local users to cause a denial-of-service and malicious file execution via carefully crafted and named executable files.
Remediation
To remediate this issue, go to the Product Downloads site, and download the applicable product hotfix file:
| Product | Version | Type | Release Date |
| DXL Broker | 6.0.0 Hotfix 1 | Hotfix | February 13, 2020 |
| DXL Broker | 5.0.2 Hotfix 1 | Hotfix | February 13, 2020 |
Download and Installation Instructions
For instructions to download product updates and hotfixes, see KB56057 - How to download Enterprise product updates and documentation. Review the Release Notes and Installation Guide for instructions on how to install these updates. All documentation is available at our Product Documentation site.
Frequently Asked Questions (FAQs)
How do I know if my product is vulnerable?
For Endpoint products:
Use the following instructions for endpoint or client-based products:
- Right-click on the McAfee tray shield icon on the Windows taskbar.
- Select Open Console.
- In the console, select Action Menu.
- In the Action Menu, select Product Details. The product version displays.
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.
When calculating CVSS scores, we've 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?
CVE-2020-7252: Unquoted service executable path
| Base Score | 4.2 |
| Attack Vector (AV) | Local (L) |
| Attack Complexity (AC) | Low (L) |
| Privileges Required (PR) | High (H) |
| User Interaction (UI) | Required (R) |
| Scope (S) | Unchanged (U) |
| Confidentiality (C) | None (N) |
| Integrity (I) | None (N) |
| Availability (A) | High (H) |
| Temporal Score (Overall) | 3.8 |
| Exploitability (E) | Unproven (U) |
| Remediation Level (RL) | Proof of Concept (P) |
| 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:L/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H/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 Knowledge Center. 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 you?
If you have information about a security issue or vulnerability with a product, follow the instructions provided in KB95563 - Report a vulnerability.
How do you 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 of our 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.
We only publish 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.
To view our PSIRT policy, see KB95564 - About PSIRT.
Resources
To contact Technical Support, go to the Create a Service Request page and log on to the ServicePortal.
- 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 fields to have your password and instructions emailed to you.
Disclaimer
The information provided in this Security Bulletin is provided as is without warranty of any kind. We disclaim all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall we or our suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits, or special damages, even if we or our suppliers have been advised of the possibility of such damages. Some states don't 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 shouldn't 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 aren't 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 remain at our sole discretion and may be changed or canceled at any time.
