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Ubuntu Security Notice USN-6885-5
July 21, 2025

apache2 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Apache HTTP Server.

Software Description:
- apache2: Apache HTTP server

Details:

USN-6885-1 fixed vulnerabilities in Apache. This update provides
the corresponding updates for Ubuntu 14.04 LTS.

Original advisory details:

 Orange Tsai discovered that the Apache HTTP Server mod_rewrite module
 incorrectly handled certain substitutions. A remote attacker could
 possibly use this issue to execute scripts in directories not directly
 reachable by any URL, or cause a denial of service. Some environments
 may require using the new UnsafeAllow3F flag to handle unsafe
 substitutions. (CVE-2024-38474, CVE-2024-38475)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.04 LTS
  apache2                         2.4.7-1ubuntu4.22+esm10
                                  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-6885-5
  https://ubuntu.com/security/notices/USN-6885-4
  https://ubuntu.com/security/notices/USN-6885-3
  https://ubuntu.com/security/notices/USN-6885-2
  https://ubuntu.com/security/notices/USN-6885-1
  CVE-2024-38474, CVE-2024-38475