Security Bulletin - DLP Endpoint Windows and DLP Discover updates fix two vulnerabilities (CVE-2021-31844, CVE-2021-31845)
Security Bulletins ID:
SB10368
Last Modified: 2022-05-04 19:30:15 Etc/GMT
Last Modified: 2022-05-04 19:30:15 Etc/GMT
Summary
First Published: September 14, 2021
Article contents:
This issue impacts both the products in a similar way. Scanning malicious files can lead to code execution with elevated privileges. In the case of DLP Endpoint for Windows, this is a local attack as the files are on the same machine as the agent. For DLP Discover it can be a file on the local machine or on a machine in the same network as the host of the DLP Discover service. The CVSS rating is slightly higher for the latter. Publication of this Security Bulletin was held back until DLP Discover had been remediated as they both rely on the same Madshi library for content extraction. The fix required code changes in both products beyond the library, hence the separate CVEs.
To remediate this issue:
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 the Installation Guide for instructions on how to install these updates. All documentation is available on the Product Documentation site.
Acknowledgments
We credit Exodus Intelligence for responsibly reporting this flaw.
Frequently Asked Questions (FAQs)
How do I know if my product is vulnerable or not?
For endpoint products:
Use the following instructions for endpoint or client-based products:
Common Vulnerability Scoring System (CVSS) 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?
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.
| Product: | Impacted Versions: | CVE ID: | Impact of Vulnerabilities: | Severity Ratings: | CVSS v3.1 Base/Temporal Scores: |
| Data Loss Prevention (DLP) Endpoint for Windows | Prior to 11.6.200 | CVE-2021-31844 | CWE-120: Buffer Copy without Checking Size of Input | High | 8.2 / 7.4 |
| DLP Discover |
11.7.0 Prior to 11.6.100 |
CVE-2021-31845 | CWE-120: Buffer Copy without Checking Size of Input | High | 8.4 / 7.6 |
| Recommendations: | Install or update to:
|
||||
| Security Bulletin Replacement: | None | ||||
| Location of updated software: | Product Downloads site | ||||
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Article contents:
- Vulnerability Description
- Remediation
- Acknowledgments
- Frequently Asked Questions (FAQs)
- Resources
- Disclaimer
This issue impacts both the products in a similar way. Scanning malicious files can lead to code execution with elevated privileges. In the case of DLP Endpoint for Windows, this is a local attack as the files are on the same machine as the agent. For DLP Discover it can be a file on the local machine or on a machine in the same network as the host of the DLP Discover service. The CVSS rating is slightly higher for the latter. Publication of this Security Bulletin was held back until DLP Discover had been remediated as they both rely on the same Madshi library for content extraction. The fix required code changes in both products beyond the library, hence the separate CVEs.
- CVE-2021-31844
A buffer overflow vulnerability in Data Loss Prevention (DLP) Endpoint for Windows prior to 11.6.200 allows a local attacker to execute arbitrary code with elevated privileges through placing carefully constructed Ami Pro (.sam) files onto the local system and triggering a DLP Endpoint scan through accessing a file. This is caused by the destination buffer being of fixed size and incorrect checks being made on the source size.
NVD CVE-2021-31844
MITRE CVE-2021-31844
- CVE-2021-31845
A buffer overflow vulnerability in Data Loss Prevention (DLP) Discover 11.7.x prior to 11.7.100 or 11.6.x prior to 11.6.100 allows an attacker in the same network as the DLP Discover to execute arbitrary code through placing carefully constructed Ami Pro (.sam) files onto a machine and having DLP Discover scan it, leading to remote code execution with elevated privileges. This is caused by the destination buffer being of fixed size and incorrect checks being made on the source size.
NVD CVE-2021-31845
MITRE CVE-2021-31845
To remediate this issue:
- Customers using DLP Endpoint for Windows should update to 11.6.200 or later.
- Customers using DLP Discover should update to 11.7.100 or later, or 11.6.100 or later.
| Product | Version | Type | Release Date |
| DLP Endpoint for Windows | 11.6.200 | Update | June 10, 2021 |
| DLP Discover | 11.7.100 | Update | November 16, 2021 |
| 11.6.100 | Update | September 14, 2021 |
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 the Installation Guide for instructions on how to install these updates. All documentation is available on the Product Documentation site.
Acknowledgments
We credit Exodus Intelligence for responsibly reporting this flaw.
Frequently Asked Questions (FAQs)
How do I know if my product is vulnerable or not?
For endpoint products:
Use the following instructions for endpoint or client-based products:
- Right-click 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.
Common Vulnerability Scoring System (CVSS) 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-2021-31844: Local Privilege Escalation in DLP Endpoint for Windows
Base Score 8.2 Attack Vector (AV) Local (L) Attack Complexity (AC) Low (L) Privileges Required (PR) Low (L) User Interaction (UI) Required (R) Scope (S) Changed (C) Confidentiality (C) High (H) Integrity (I) High (H) Availability (A) High (H) Temporal Score (Overall) 7.4 Exploitability (E) Proof-of-Concept (P) Remediation Level (RL) Official Fix (O) Report Confidence (RC) Confirmed (C)
NOTE: This CVSS version 3.1 vector was used to generate this score.
- CVE-2021-31845: Remote Code Execution in DLP Discover
Base Score 8.4 Attack Vector (AV) Adjacent (A) Attack Complexity (AC) Low (L) Privileges Required (PR) Low (L) User Interaction (UI) Required (R) Scope (S) Changed (C) Confidentiality (C) High (H) Integrity (I) High (H) Availability (A) High (H) Temporal Score (Overall) 7.6 Exploitability (E) Proof-of-Concept (P) Remediation Level (RL) Official Fix (O) Report Confidence (RC) Confirmed (C)
NOTE: This CVSS version 3.1 vector was used to generate this score.
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.
