========================================================================== Ubuntu Security Notice USN-5487-3 June 23, 2022 apache2 regression ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.04 LTS - Ubuntu 16.04 ESM - Ubuntu 14.04 ESM Summary: USN-5487-1 introduced a regression in Apache HTTP Server. Software Description: - apache2: Apache HTTP server Details: USN-5487-1 fixed several vulnerabilities in Apache HTTP Server. Unfortunately it caused regressions. USN-5487-2 reverted the patches that caused the regression in Ubuntu 14.04 ESM for further investigation. This update re-adds the security fixes for Ubuntu 14.04 ESM and fixes two different regressions: one affecting mod_proxy only in Ubuntu 14.04 ESM and another in mod_sed affecting also Ubuntu 16.04 ESM and Ubuntu 18.04 LTS. We apologize for the inconvenience. Original advisory details: It was discovered that Apache HTTP Server mod_proxy_ajp incorrectly handled certain crafted request. A remote attacker could possibly use this issue to perform an HTTP Request Smuggling attack. (CVE-2022-26377) It was discovered that Apache HTTP Server incorrectly handled certain request. An attacker could possibly use this issue to cause a denial of service. (CVE-2022-28614) It was discovered that Apache HTTP Server incorrectly handled certain request. An attacker could possibly use this issue to cause a crash or expose sensitive information. (CVE-2022-28615) It was discovered that Apache HTTP Server incorrectly handled certain request. An attacker could possibly use this issue to cause a denial of service. (CVE-2022-29404) It was discovered that Apache HTTP Server incorrectly handled certain request. An attacker could possibly use this issue to cause a crash. (CVE-2022-30522) It was discovered that Apache HTTP Server incorrectly handled certain request. An attacker could possibly use this issue to execute arbitrary code or cause a crash. (CVE-2022-30556) It was discovered that Apache HTTP Server incorrectly handled certain request. An attacker could possibly use this issue to bypass IP based authentication. (CVE-2022-31813) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS: apache2 2.4.29-1ubuntu4.25 apache2-bin 2.4.29-1ubuntu4.25 Ubuntu 16.04 ESM: apache2 2.4.18-2ubuntu3.17+esm7 apache2-bin 2.4.18-2ubuntu3.17+esm7 Ubuntu 14.04 ESM: apache2 2.4.7-1ubuntu4.22+esm8 apache2-bin 2.4.7-1ubuntu4.22+esm8 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5487-3 https://ubuntu.com/security/notices/USN-5487-1 CVE-2022-26377, CVE-2022-28614, CVE-2022-28615, CVE-2022-29404, CVE-2022-30522, CVE-2022-30556, CVE-2022-31813, https://launchpad.net/bugs/1979577, https://launchpad.net/bugs/1979641 Package Information: https://launchpad.net/ubuntu/+source/apache2/2.4.29-1ubuntu4.25