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Direct Download Links

https://github.com/Qualys/log4jscanwin/releases/download/2.1.3.0/Log4jScanner-2.1.3.0.zip https://github.com/Qualys/log4jscanwin/releases/download/log4j-rem-1.2.2.1/Log4jRemediate-1.2.2.1.zip

Log4jScanner

Description

The Log4jScanner.exe utility helps to detect CVE-2021-44228, CVE-2021-44832, CVE-2021-45046, and CVE-2021-45105 vulnerabilities. The utility will scan the entire hard drive(s) including archives (and nested JARs) for the Java class that indicates the Java application contains a vulnerable log4j library. The utility will output its results to a console.

Qualys has added the following new QIDs that are designed to look for the results of this scan and mark the asset as vulnerable if the vulnerable log4j library was found.

• (376160) CVE-2021-44228
• (376193) CVE-2021-45046
• (376195) CVE-2021-45105
• (376210) CVE-2021-44832
• (45515) Information Gathering that the Log4j Scan Utility was ran on the host

Qualys customers should use the following to run the tool on any asset they want to scan, from an elevated command prompt:

Log4jScanner.exe /scan /report_sig

Usage

/scan
  Scan local drives for vulnerable files used by various Java applications.
/scan_network
  Scan network drives for vulnerable files used by various Java applications.
/scan_directory "C:\Some\Path"
  Scan a specific directory for vulnerable files used by various Java applications.
/scan_file "C:\Some\Path\Some.jar"
  Scan a specific file for supported CVE(s).
/scaninclmountpoints
  Scan local drives including mount points for vulnerable files used by various Java applications.
/exclude_drive "C:\"
  Exclude a drive from the scan.
/exclude_directory "C:\Some\Path"
  Exclude a directory from a scan.
/exclude_file "C:\Some\Path\Some.jar"
  Exclude a file from a scan.
/knownTarExtension ".tar"
/knownGZipTarExtension ".tgz"
/knownBZipTarExtension ".tbz"
/knownZipExtension ".jar"
  Add additional file type extensions to the scanner.
/report
  Generate a JSON report of possible detections of supported CVE(s).
/report_pretty
  Generate a human readable JSON report of possible detections of supported CVE(s).
/report_sig
  Generate a signature report of possible detections of supported CVE(s).
/lowpriority
  Lowers the execution and I/O priority of the scanner.
/help
  Displays this help page.

Sample Usage (from an elevated command prompt) - The following command helps you scan local drives for vulnerable JAR, WAR, EAR, and ZIP.

Log4jScanner.exe /scan

Sample Usage (from an elevated command prompt) - The following command helps you scan local drives for vulnerable files and writes a signature report to C:\ProgramData\Qualys

Log4jScanner.exe /scan /report_sig

Output - The following output shows the detection

D:\Temp>Log4jScanner.exe /scan /exclude_directory C:\ /knownZipExtension .ZZZ
Qualys Log4j Vulnerability Scanner 2.1.1.0
https://www.qualys.com/
Dependencies: minizip/1.1 zlib/1.2.11, bzip2/1.0.8
Supported CVE(s): CVE-2021-4104, CVE-2021-44228, CVE-2021-44832, CVE-2021-45046, CVE-2021-45105

Known TAR Extensions            : .tar
Known GZIP TAR Extensions       : .tgz, .tar.gz
Known BZIP TAR Extensions       : .tbz, .tbz2, .tar.bz, .tar.bz2
Known ZIP Extensions            : .zip, .jar, .war, .ear, .par, .kar, .sar, .rar, .jpi, .hpi, .apk, .ZZZ
Excluding Directories:
        C:\


Scanning Local Drives...
Log4j Found: 'D:\Src\Projects\log4jscanner\jar\testdata\arara.jar' ( Manifest Vendor: Unknown, Manifest Version: 6.1.1, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.14.1, CVE Status: Potentially Vulnerable ( CVE-2021-44228: Found CVE-2021-44832: Found CVE-2021-45046: Found CVE-2021-45105: Found ) )
Log4j Found: 'D:\Src\Projects\log4jscanner\jar\testdata\arara.signed.jar' ( Manifest Vendor: Unknown, Manifest Version: 6.1.1, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.14.1, CVE Status: Potentially Vulnerable ( CVE-2021-44228: Found CVE-2021-44832: Found CVE-2021-45046: Found CVE-2021-45105: Found ) )
Log4j Found: 'D:\Src\Projects\log4jscanner\jar\testdata\bad_jar_in_jar.jar!vuln-class.jar' ( Manifest Vendor: log4j, Manifest Version: 2.14.0, JNDI Class: NOT Found, Log4j Vendor: log4j-jcl, Log4j Version: 2.14.0, CVE Status: Mitigated )
Log4j Found: 'D:\Src\Projects\log4jscanner\jar\testdata\bad_jar_in_jar_in_jar.jar!bad_jar_in_jar.jar!vuln-class.jar' ( Manifest Vendor: log4j, Manifest Version: 2.14.0, JNDI Class: NOT Found, Log4j Vendor: log4j-jcl, Log4j Version: 2.14.0, CVE Status: Mitigated )
Log4j Found: 'D:\Src\Projects\log4jscanner\jar\testdata\bad_jar_with_invalid_jar.jar!vuln-class.jar' ( Manifest Vendor: log4j, Manifest Version: 2.14.0, JNDI Class: NOT Found, Log4j Vendor: log4j-jcl, Log4j Version: 2.14.0, CVE Status: Mitigated )
Log4j Found: 'D:\Src\Projects\log4jscanner\jar\testdata\good_jar_in_jar.jar!safe1.jar' ( Manifest Vendor: log4j, Manifest Version: 2.14.0, JNDI Class: NOT Found, Log4j Vendor: log4j-jcl, Log4j Version: 2.14.0, CVE Status: Mitigated )
Log4j Found: 'D:\Src\Projects\log4jscanner\jar\testdata\good_jar_in_jar_in_jar.jar!good_jar_in_jar.jar!safe1.jar' ( Manifest Vendor: log4j, Manifest Version: 2.14.0, JNDI Class: NOT Found, Log4j Vendor: log4j-jcl, Log4j Version: 2.14.0, CVE Status: Mitigated )
Log4j Found: 'D:\Src\Projects\log4jscanner\jar\testdata\good_jar_with_invalid_jar.jar!safe1.jar' ( Manifest Vendor: log4j, Manifest Version: 2.14.0, JNDI Class: NOT Found, Log4j Vendor: log4j-jcl, Log4j Version: 2.14.0, CVE Status: Mitigated )
Log4j Found: 'D:\Src\Projects\log4jscanner\jar\testdata\log4j-core-2.1.jar' ( Manifest Vendor: org.apache, Manifest Version: 2.1, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.1, CVE Status: Potentially Vulnerable ( CVE-2021-44228: Found CVE-2021-44832: Found CVE-2021-45046: Found CVE-2021-45105: Found ) )
Log4j Found: 'D:\Src\Projects\log4jscanner\jar\testdata\log4j-core-2.12.1.jar' ( Manifest Vendor: log4j, Manifest Version: 2.12.1, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.12.1, CVE Status: Potentially Vulnerable ( CVE-2021-44228: Found CVE-2021-44832: Found CVE-2021-45046: Found CVE-2021-45105: Found ) )
Log4j Found: 'D:\Src\Projects\log4jscanner\jar\testdata\log4j-core-2.14.0.jar' ( Manifest Vendor: log4j, Manifest Version: 2.14.0, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.14.0, CVE Status: Potentially Vulnerable ( CVE-2021-44228: Found CVE-2021-44832: Found CVE-2021-45046: Found CVE-2021-45105: Found ) )
Log4j Found: 'D:\Src\Projects\log4jscanner\jar\testdata\log4j-core-2.15.0.jar' ( Manifest Vendor: log4j, Manifest Version: 2.15.0, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.15.0, CVE Status: Potentially Vulnerable ( CVE-2021-44228: NOT Found CVE-2021-44832: Found CVE-2021-45046: Found CVE-2021-45105: Found ) )
Log4j Found: 'D:\Src\Projects\log4jscanner\jar\testdata\log4j-core-2.16.0.jar' ( Manifest Vendor: log4j, Manifest Version: 2.16.0, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.16.0, CVE Status: Potentially Vulnerable ( CVE-2021-44228: NOT Found CVE-2021-44832: Found CVE-2021-45046: NOT Found CVE-2021-45105: Found ) )
Log4j Found: 'D:\Src\Projects\log4jscanner\jar\testdata\safe1.jar' ( Manifest Vendor: log4j, Manifest Version: 2.14.0, JNDI Class: NOT Found, Log4j Vendor: log4j-jcl, Log4j Version: 2.14.0, CVE Status: Mitigated )
Log4j Found: 'D:\Src\Projects\log4jscanner\jar\testdata\safe1.signed.jar' ( Manifest Vendor: log4j, Manifest Version: 2.14.0, JNDI Class: NOT Found, Log4j Vendor: log4j-jcl, Log4j Version: 2.14.0, CVE Status: Mitigated )
Log4j Found: 'D:\Src\Projects\log4jscanner\jar\testdata\similarbutnotvuln.jar' ( Manifest Vendor: org.apache, Manifest Version: 2.1, JNDI Class: NOT Found, Log4j Vendor: log4j-core, Log4j Version: 2.1, CVE Status: Potentially Vulnerable ( CVE-2021-44228: NOT Found CVE-2021-44832: Found CVE-2021-45046: NOT Found CVE-2021-45105: Found ) )
Log4j Found: 'D:\Src\Projects\log4jscanner\jar\testdata\vuln-class.jar' ( Manifest Vendor: log4j, Manifest Version: 2.14.0, JNDI Class: NOT Found, Log4j Vendor: log4j-jcl, Log4j Version: 2.14.0, CVE Status: Mitigated )
Log4j Found: 'D:\Temp\log4j-1.1.3.zip!jakarta-log4j-1.1.3/dist/lib/log4j-core.jar' ( Manifest Vendor: Apache Software Foundation, Manifest Version: 1.1.3, JNDI Class: NOT Found, Log4j Vendor: log4j, Log4j Version: 1.1.3, CVE Status: Mitigated )
Log4j Found: 'D:\Temp\log4j-1.1.3.zip!jakarta-log4j-1.1.3/dist/lib/log4j.jar' ( Manifest Vendor: Apache Software Foundation, Manifest Version: 1.1.3, JNDI Class: NOT Found, Log4j Vendor: log4j, Log4j Version: 1.1.3, CVE Status: Mitigated )
Log4j Found: 'D:\Temp\log4j-1.1.3.zip' ( Manifest Vendor: , Manifest Version: , JNDI Class: NOT Found, Log4j Vendor: Unknown, Log4j Version: Unknown, CVE Status: N/A )
Log4j Found: 'D:\Temp\log4j-1.2.17.jar' ( Manifest Vendor: Apache Software Foundation, Manifest Version: 1.2.17, JNDI Class: NOT Found, Log4j Vendor: log4j, Log4j Version: 1.2.17, CVE Status: Potentially Vulnerable ( CVE-2021-4104: Found ) )
Log4j Found: 'D:\Temp\log4j-1.2.17.zip!apache-log4j-1.2.17/log4j-1.2.17.jar' ( Manifest Vendor: Apache Software Foundation, Manifest Version: 1.2.17, JNDI Class: NOT Found, Log4j Vendor: log4j, Log4j Version: 1.2.17, CVE Status: Potentially Vulnerable ( CVE-2021-4104: Found ) )
Log4j Found: 'D:\Temp\log4j-1.2.17.zip' ( Manifest Vendor: , Manifest Version: , JNDI Class: NOT Found, Log4j Vendor: Unknown, Log4j Version: Unknown, CVE Status: N/A )
Log4j Found: 'D:\Temp\log4j-1.2.9.jar' ( Manifest Vendor: Apache Software Foundation, Manifest Version: 1.2.9, JNDI Class: NOT Found, Log4j Vendor: log4j, Log4j Version: 1.2.9, CVE Status: Potentially Vulnerable ( CVE-2021-4104: Found ) )
Log4j Found: 'D:\Temp\log4j-1.2.9.zip!logging-log4j-1.2.9/dist/lib/log4j-1.2.9.jar' ( Manifest Vendor: Apache Software Foundation, Manifest Version: 1.2.9, JNDI Class: NOT Found, Log4j Vendor: log4j, Log4j Version: 1.2.9, CVE Status: Potentially Vulnerable ( CVE-2021-4104: Found ) )
Log4j Found: 'D:\Temp\log4j-1.2.9.zip' ( Manifest Vendor: , Manifest Version: , JNDI Class: NOT Found, Log4j Vendor: Unknown, Log4j Version: Unknown, CVE Status: N/A )
Log4j Found: 'D:\Temp\log4j-api-2.16.0.jar' ( Manifest Vendor: log4j, Manifest Version: 2.16.0, JNDI Class: NOT Found, Log4j Vendor: log4j-api, Log4j Version: 2.16.0, CVE Status: Mitigated )
Log4j Found: 'D:\Temp\log4j-core-2.11.1.jar' ( Manifest Vendor: log4j, Manifest Version: 2.11.1, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.11.1, CVE Status: Potentially Vulnerable ( CVE-2021-44228: Found CVE-2021-44832: Found CVE-2021-45046: Found CVE-2021-45105: Found ) )
Log4j Found: 'D:\Temp\log4j-core-2.12.4.jar' ( Manifest Vendor: log4j, Manifest Version: 2.12.4, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.12.4, CVE Status: Mitigated )
Log4j Found: 'D:\Temp\log4j-core-2.14.0.jar' ( Manifest Vendor: log4j, Manifest Version: 2.14.0, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.14.0, CVE Status: Potentially Vulnerable ( CVE-2021-44228: Found CVE-2021-44832: Found CVE-2021-45046: Found CVE-2021-45105: Found ) )
Log4j Found: 'D:\Temp\log4j-core-2.15.0.jar' ( Manifest Vendor: log4j, Manifest Version: 2.15.0, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.15.0, CVE Status: Potentially Vulnerable ( CVE-2021-44228: NOT Found CVE-2021-44832: Found CVE-2021-45046: Found CVE-2021-45105: Found ) )
Log4j Found: 'D:\Temp\log4j-core-2.15.0.ZZZ' ( Manifest Vendor: log4j, Manifest Version: 2.15.0, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.15.0, CVE Status: Potentially Vulnerable ( CVE-2021-44228: NOT Found CVE-2021-44832: Found CVE-2021-45046: Found CVE-2021-45105: Found ) )
Log4j Found: 'D:\Temp\log4j-core-2.16.0.jar' ( Manifest Vendor: log4j, Manifest Version: 2.16.0, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.16.0, CVE Status: Potentially Vulnerable ( CVE-2021-44228: NOT Found CVE-2021-44832: Found CVE-2021-45046: NOT Found CVE-2021-45105: Found ) )
Log4j Found: 'D:\Temp\log4j-core-2.17.0.jar' ( Manifest Vendor: log4j, Manifest Version: 2.17.0, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.17.0, CVE Status: Potentially Vulnerable ( CVE-2021-44228: NOT Found CVE-2021-44832: Found CVE-2021-45046: NOT Found CVE-2021-45105: NOT Found ) )
Log4j Found: 'D:\Temp\log4j-core-2.17.1.jar' ( Manifest Vendor: log4j, Manifest Version: 2.17.1, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.17.1, CVE Status: Mitigated )
Log4j Found: 'D:\Temp\log4j-core-2.3.2.jar' ( Manifest Vendor: org.apache, Manifest Version: 2.3.2, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.3.2, CVE Status: Mitigated )
Log4j Found: 'D:\Temp\log4j-core.jar' ( Manifest Vendor: Apache Software Foundation, Manifest Version: 1.1.3, JNDI Class: NOT Found, Log4j Vendor: log4j, Log4j Version: 1.1.3, CVE Status: Mitigated )
Log4j Found: 'D:\Temp\log4j-iostreams-2.15.0.jar' ( Manifest Vendor: log4j, Manifest Version: 2.15.0, JNDI Class: NOT Found, Log4j Vendor: log4j-iostreams, Log4j Version: 2.15.0, CVE Status: Mitigated )
Log4j Found: 'D:\Temp\log4j.jar' ( Manifest Vendor: Apache Software Foundation, Manifest Version: 1.1.3, JNDI Class: NOT Found, Log4j Vendor: log4j, Log4j Version: 1.1.3, CVE Status: Mitigated )
Log4j Found: 'D:\Temp\org.apache.log4j_1.2.15.v201012070815.jar' ( Manifest Vendor: %PLUGIN_PROVIDER, Manifest Version: 1.2.15.v201012070815, JNDI Class: NOT Found, Log4j Vendor: Unknown, Log4j Version: Unknown, CVE Status: N/A )
Log4j Found: 'D:\Temp\Sample3.zip!Sample1.jar' ( Manifest Vendor: Unknown, Manifest Version: 7.5.2, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.11.1, CVE Status: Potentially Vulnerable ( CVE-2021-44228: Found CVE-2021-44832: Found CVE-2021-45046: Found CVE-2021-45105: Found ) )
Log4j Found: 'D:\Temp\Sample3.zip!Sample2.jar' ( Manifest Vendor: Unknown, Manifest Version: 7.5.2, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.11.1, CVE Status: Potentially Vulnerable ( CVE-2021-44228: Found CVE-2021-44832: Found CVE-2021-45046: Found CVE-2021-45105: Found ) )
Log4j Found: 'D:\Temp\昆虫\log4j-core-2.11.1.jar' ( Manifest Vendor: log4j, Manifest Version: 2.11.1, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.11.1, CVE Status: Potentially Vulnerable ( CVE-2021-44228: Found CVE-2021-44832: Found CVE-2021-45046: Found CVE-2021-45105: Found ) )
Log4j Found: 'D:\Temp\昆虫\log4j-core-2.14.0.jar' ( Manifest Vendor: log4j, Manifest Version: 2.14.0, JNDI Class: Found, Log4j Vendor: log4j-core, Log4j Version: 2.14.0, CVE Status: Potentially Vulnerable ( CVE-2021-44228: Found CVE-2021-44832: Found CVE-2021-45046: Found CVE-2021-45105: Found ) )

Scan Summary:
        Scan Date:                       2022-01-10T10:05:18-0800
        Scan Duration:                   9 Seconds
        Scan Error Count:                1
        Scan Status:                     Partially Successful
        Files Scanned:                   184889
        Directories Scanned:             30159
        Compressed File(s) Scanned:      96
        JAR(s) Scanned:                  50
        WAR(s) Scanned:                  0
        EAR(s) Scanned:                  0
        TAR(s) Scanned:                  2
        Vulnerabilities Found:           22

Log4jRemediate

Description

The Log4jRemediate.exe utility helps in mitigating CVE-2021-44228 and CVE-2021-45046 vulnerabilities. The utility will remove the JndiLookup.class from vulnerable log4j core libraries (including archives and nested JARs). The utility will output its results to a console.

Users should use the following to run the tool on any asset they want to mitigate the vulnerability, from an elevated command prompt:

Log4jRemediate.exe /remediate_sig

Prerequisites

1. Log4jRemediate.exe mitigates vulnerabilities in the report file created by the Log4jScanner.exe utility. Therefore, Log4jScanner.exe has to be executed with the following from an elevated command prompt before running the remediation utility:

   Log4jScanner.exe /scan /report_sig

2. It is necessary to shut down running JVM processes before running the utility. JVM processes can be started again after the utility completes execution.
3. If required, users should backup copies of vulnerable libraries reported by Log4jScanner.exe in %ProgramData%\Qualys\log4j_findings.out.

Usage

/remediate_sig
  Remove JndiLookup.class from JAR, WAR, EAR, ZIP files detected by scanner utility.
/report
  Generate a JSON for mitigations of supported CVE(s).
/report_pretty
  Generate a pretty JSON for mitigations of supported CVE(s).

Sample Usage (from an elevated command prompt) - The following command helps you mitigate vulnerable JAR, WAR, EAR, and ZIP files detected by the scanner utility.

Log4jRemediate.exe /remediate_sig

Output - The following output shows remediation

Remediation start time : 2022-01-03T11:04:52+0530
Processing file: C:\log4j-core-2.15.0\log4j-core-2.15.0.jar
Copied fixed file: C:\log4j-core-2.15.0\log4j-core-2.15.0.jar
Fixed file: C:\log4j-core-2.15.0\log4j-core-2.15.0.jar
Remediation end time : 2022-01-03T11:04:54+0530

Run status : Success
Result file location : C:\ProgramData\Qualys\log4j_remediate.out