========================================================================== Ubuntu Security Notice USN-6885-2 July 11, 2024
apache2 regression ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS Summary: USN-6885-1 introduced a regression in Apache HTTP Server. Software Description: - apache2: Apache HTTP server Details: USN-6885-1 fixed vulnerabilities in Apache HTTP Server. One of the security fixes introduced a regression when proxying requests to a HTTP/2 server. This update fixes the problem. We apologize for the inconvenience. Original advisory 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) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 24.04 LTS apache2 2.4.58-1ubuntu8.3 Ubuntu 22.04 LTS apache2 2.4.52-1ubuntu4.11 Ubuntu 20.04 LTS apache2 2.4.41-4ubuntu3.20 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-6885-2 https://ubuntu.com/security/notices/USN-6885-1 https://launchpad.net/bugs/2072648 Package Information: https://launchpad.net/ubuntu/+source/apache2/2.4.58-1ubuntu8.3 https://launchpad.net/ubuntu/+source/apache2/2.4.52-1ubuntu4.11 https://launchpad.net/ubuntu/+source/apache2/2.4.41-4ubuntu3.20
OpenPGP_signature.asc
Description: OpenPGP digital signature
