QID 150402

Date Published: 2021-12-02

QID 150402: Apache HTTP Server Unexpected URL matching (CVE-2021-30641)

The Apache HTTP Server, colloquially called Apache, is a free and open-source cross-platform web server software.

On affected versions of Apache HTTP Server a Unexpected URL matching behavior vulnerability exists when directive MergeSlashes has been set to "OFF" in the configuration file.

Affected Versions:
Apache HTTP Server version 2.4.39
Apache HTTP Server version 2.4.41
Apache HTTP Server version 2.4.43
Apache HTTP Server version 2.4.46

QID Detection Logic:(Unauthenticated)
This QID sends a HTTP GET request and checks the response headers to confirm if the host is running vulnerable version of Apache HTTP Server.

Successful exploitation of this vulnerability would allow a remote attacker to bypass implemented security restrictions on the target server.

  • CVSS V3 rated as Medium - 5.3 severity.
  • CVSS V2 rated as Medium - 5 severity.
    • Solution
    Customers are advised to upgrade to the latest version of Apache HTTP Server to remediate this vulnerability. For more information related to this vulnerability please refer to Apache's Security advisory
    Vendor References

    CVEs related to QID 150402

    CVE-2021-30641 |
    Software Advisories
    Advisory ID Software Component Link
    Apache HTTP Server URL Logo httpd.apache.org/download.cgi
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