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USN-6885-1: Apache HTTP Server vulnerabilities

8 July 2024

Several security issues were fixed in Apache HTTP Server.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Releases

Packages

Details

Marc Stern discovered that the Apache HTTP Server incorrectly handled
serving WebSocket protocol upgrades over HTTP/2 connections. A remote
attacker could possibly use this issue to cause the server to crash,
resulting in a denial of service. (CVE-2024-36387)

Orange Tsai discovered that the Apache HTTP Server mod_proxy module
incorrectly sent certain request URLs with incorrect encodings to backends.
A remote attacker could possibly use this issue to bypass authentication.
(CVE-2024-38473)

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, CVE-2024-39573)

Orange Tsai discovered that the Apache HTTP Server incorrectly handled
certain response headers. A remote attacker could possibly use this issue
to obtain sensitive information, execute local scripts, or perform SSRF
attacks. (CVE-2024-38476)

Orange Tsai discovered that the Apache HTTP Server mod_proxy module
incorrectly handled certain requests. A remote attacker could possibly use
this issue to cause the server to crash, resulting in a denial of service.
(CVE-2024-38477)

It was discovered that the Apache HTTP Server incorrectly handled certain
handlers configured via AddType. A remote attacker could possibly use this
issue to obtain source code. (CVE-2024-39884)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 24.04
Ubuntu 23.10
Ubuntu 22.04
Ubuntu 20.04

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

Related notices

  • USN-6885-3: apache2-suexec-pristine, apache2, apache2-doc, apache2-ssl-dev, apache2-suexec-custom, apache2-utils, apache2-data, apache2-bin, apache2-dev