文書番号: 000194651

DSA-2021-309: Dell Technologies Data Protection Advisor Security Update for Apache Log4j Remote Code Execution Vulnerability (CVE-2021-44228 , CVE-2021-45046, and CVE-2021-45105)

概要: Dell Technologies Data Protection Advisor (DPA) remediation is available for the Apache Log4j Remote Code Execution Vulnerability that may be exploited by malicious users to compromise the affected system. Dell recommends implementing this remediation as soon as possible in light of the critical severity of the vulnerability. ...

文書の内容

影響

Critical

詳細

Third-party Component	CVEs	More information
Apache Log4j	CVE-2021-44228 , CVE-2021-45046, CVE-2021-45105	Apache Log4j Remote Code Execution

Third-party Component	CVEs	More information
Apache Log4j	CVE-2021-44228 , CVE-2021-45046, CVE-2021-45105	Apache Log4j Remote Code Execution

デル・テクノロジーズでは、すべてのお客様に対して、CVSSベーススコアに加えて、特定のセキュリティの脆弱性に付随する潜在的な重要度に影響する可能性のある現状スコアや環境スコアも考慮することをお勧めしています。

影響を受ける製品と修復

Product and Component	Versions	Updated Versions	Link to Update
Data Protection Advisor	19.6.0	DPA 19.6 Build B24	Support for Data Protection Advisor \| Drivers & Downloads \| Dell India
	19.5.x	DPA 19.5 Build 74	Support for Data Protection Advisor \| Drivers & Downloads \| Dell India
	19.4.x	DPA 19.4 Build B104	Support for Data Protection Advisor \| Drivers & Downloads \| Dell India
	19.3.x, 19.2.x, 19.1.X, 18.2.x (IDPA), 18.x (or earlier) -standalone DPA is EOSL	Dell Technologies recommends customers apply the resolution detailed in the Workaround and Mitigation section of this DSA.

Note: Only the DPA Agent is impacted, but a complete upgrade of DPA (DPA Server, DPA Agent, and DPA Datastore) is required, see updated version in the above table.

Product and Component	Versions	Updated Versions	Link to Update
Data Protection Advisor	19.6.0	DPA 19.6 Build B24	Support for Data Protection Advisor \| Drivers & Downloads \| Dell India
	19.5.x	DPA 19.5 Build 74	Support for Data Protection Advisor \| Drivers & Downloads \| Dell India
	19.4.x	DPA 19.4 Build B104	Support for Data Protection Advisor \| Drivers & Downloads \| Dell India
	19.3.x, 19.2.x, 19.1.X, 18.2.x (IDPA), 18.x (or earlier) -standalone DPA is EOSL	Dell Technologies recommends customers apply the resolution detailed in the Workaround and Mitigation section of this DSA.

Note: Only the DPA Agent is impacted, but a complete upgrade of DPA (DPA Server, DPA Agent, and DPA Datastore) is required, see updated version in the above table.

回避策と緩和策

The workaround steps mentioned in this document are a measure to limit the exposure and does not fully mitigate the vulnerability.

The alternative is to apply any of the latest builds which has the remediation. Support for Data Protection Advisor | Drivers & Downloads | Dell India

Note:

The workaround fixes persist across system reboots.
After applying the workaround steps mentioned in this document, if DPA is upgraded to a later version, which does not have the permanent fix provided by Dell, then follow the same instructions and re-apply it.

There are three options listed below for Windows and two options listed below for Linux (We recommended Option 1 for both Windows and Linux).

DPA Agents on Windows hosts or platforms:

Option 1: Using Logpresso tool.

Download the latest version of the logpresso tool from the following location:

https://github.com/logpresso/CVE-2021-44228-Scanner

Choose the latest logscanner tool for Windows x64, zip.

Note: It is recommended to use the latest version of the logpresso tool, but be aware that the DPA testing was done with the logpresso version 2.3.2 and 2.3.3.

Extract the zip (for example, logpresso-log4j2-scan-XXX-win64).
Copy the log4j2-scan.exe to C:\temp directory of the affected DPA Servers (DPA Application Server / Datastore / Standalone Agent).

Note: Run the following steps as Administrator user.

Stop the Agent services (The below instructions are an example for a default location. If a non default location, substitute the appropriate DPA installation path.)

Example:
C:\Program Files\EMC\DPA\services\bin\dpa agent stop

After the DPA Agent services are stopped, run the following command on all the DPA servers (The below instructions are an example for a default location. If a non default location, substitute the appropriate DPA installation path.)

Example:

C:\temp\log4j2-scan.exe --fix "C:\Program Files\EMC\DPA"

Start the DPA Agent services.

Example:
C:\Program Files\EMC\DPA\services\bin\dpa agent start

In order to verify the above fix, run the following command on all the DPA Servers.

C:\temp\log4j2-scan.exe "C:\Program Files\EMC\DPA"

This command lists if any vulnerable files are present.

Find the following screenshots for reference (before and after):

As shown below, after the command is run the files should be shown as mitigated and the number of vulnerable files must be zero.

Option 2: Using PowerShell Script and the steps followed.

This is recommended ONLY if you are unable to download the logpresso tool due to security reasons.

This remediation involves utilizing a Windows PowerShell script which is using native Windows scripting commands.

See the below Knowledge Base article 194869 for the steps to follow:

Data Protection Advisor: Manual remediation for Apache Log4j vulnerabilities Windows PowerShell script (CVE-2021-44228, CVE-2021-45046)

Option 3: Using Windows Commands only and the steps followed.

This is recommended ONLY if you are unable to download the logpresso tool due to security reasons.

These instructions require only Windows native commands, access to the server (for example, Remote Desktop), and Windows Explorer.

These instructions can be applied to any type of Windows DPA installation including the DPA Application, DPA Datastore, and Standalone DPA Agent (installed alone on a server or on another type of application server).

See the below Knowledge Base article 194903 for the steps to follow:

Data Protection Advisor: Manual remediation for Log4j vulnerabilities-Windows commands only (CVE-2021-44228 and CVE-2021-45046)

DPA Agent on Linux hosts or platforms:

Option 1: Using Logpresso tool.

Download the latest version of the logpresso tool from the following location:

https://github.com/logpresso/CVE-2021-44228-Scanner

Choose the latest logscanner tool for Linux x64.

Note: It is recommended to use the latest version of the logpresso tool, but be aware that the DPA testing was done with the logpresso version 2.3.2 and 2.3.3.

Copy the logpresso-log4j2-scan-x.x.x-linux.tar.gz to /tmp directory of the affected DPA Servers (DPA Application Server / Datastore / Standalone Agent).
Open SSH to DPA Application, Agent, and Datastore server and login as root user.
Go to /tmp directory by running the following command:

cd /tmp

Extract the logpresso-log4j2-scan-x.x.x-linux.tar.gz file by running the following command:

tar -xvf logpresso-log4j2-scan-x.x.x-linux.tar.gz

Provide execute permissions to log4j2-scan by running the following command:

chmod 755 log4j2-scan

Stop the DPA Agent services by running the following command on the affected DPA Server:

/opt/emc/dpa/agent/etc/dpa stop

After the DPA Agent services are stopped, run the following command on the affected DPA server:

/tmp/log4j2-scan --fix /opt/emc/dpa

Start the DPA Agent service by executing the following command on the affected DPA Server:

/opt/emc/dpa/agent/etc/dpa start

In order to verify the above fix, run the following command on the affected DPA Server:

/tmp/log4j2-scan /opt/emc/dpa

This command lists if any vulnerable files are present.

Find the following screenshots for reference (before and after):

As shown below, after the command is run the files should be shown as mitigated and the number of vulnerable files must be zero.

Option 2: Using workaround from Apache site (Linux ONLY):

Due to security reasons, ONLY if you are unable to download logpresso tool, below are the manual steps you may follow from Apache site:

On each affected DPA Server, follow the below steps:

Open SSH to the affected DPA Server and log in as root.
Stop the DPA Agent services by running the following command on the affected DPA Server:

/opt/emc/dpa/agent/etc/dpa stop

Run the following command on the affected DPA server:

find /opt/emc/dpa/agent/lib/ -xdev -type f -name "dpa*.jar" -exec zip -q -d {} org/apache/logging/log4j/core/lookup/JndiLookup.class \;

Start the DPA Agent services by running the following command on the affected DPA Server:

/opt/emc/dpa/agent/etc/dpa start

To confirm if the JndiLookup class was removed, run the following command:

grep -R 'JndiLookup.class' /opt/emc/dpa/agent/lib

Find the following screenshots for reference:

As shown below, the output of grep for JndiLookup.class does not show any results, confirming that JndiLookup.class is removed.

変更履歴

Revision	Date	Description
1.0	2021-12-20	Initial Release
2.0	2021-12-21	Workaround and Mitigation Revision
3.0	2021-12-22	Added CVE-2021-45046
4.0	2022-01-06	Updated table to improve readability
5.0	2022-01-10	Added additional patches

法的情報

文書のプロパティ

影響を受ける製品

Data Protection Advisor

製品

Product Security Information

最後に公開された日付

13 1月 2022

文書の種類

Dell Security Advisory

トップに戻る

ようこそ

Dellへようこそ

DSA-2021-309: Dell Technologies Data Protection Advisor Security Update for Apache Log4j Remote Code Execution Vulnerability (CVE-2021-44228 , CVE-2021-45046, and CVE-2021-45105)