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Ubuntu Security Notice USN-6885-3
Ubuntu Security Notice 6885-3 - USN-6885-1 fixed several vulnerabilities in Apache. This update provides the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. 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.
==========================================================================Ubuntu Security Notice USN-6885-3September 18, 2024apache2 vulnerabilities==========================================================================A security issue affects these releases of Ubuntu and its derivatives:- Ubuntu 18.04 LTS- Ubuntu 16.04 LTSSummary:Several security issues were fixed in Apache HTTP Server.Software Description:- apache2: Apache HTTP serverDetails:USN-6885-1 fixed several vulnerabilities in Apache. This update providesthe corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 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) 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)Update instructions:The problem can be corrected by updating your system to the followingpackage versions:Ubuntu 18.04 LTS apache2 2.4.29-1ubuntu4.27+esm3 Available with Ubuntu ProUbuntu 16.04 LTS apache2 2.4.18-2ubuntu3.17+esm13 Available with Ubuntu ProIn general, a standard system update will make all the necessary changes.References: 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, CVE-2024-38476, CVE-2024-38477Related news
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Ubuntu Security Notice 6885-2 - 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. 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. 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. 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 h...
Ubuntu Security Notice 6885-2 - 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. 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. 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. 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 h...
Ubuntu Security Notice 6885-2 - 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. 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. 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. 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 h...
Ubuntu Security Notice 6885-2 - 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. 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. 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. 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 h...
Ubuntu Security Notice 6885-1 - 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. 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.
Ubuntu Security Notice 6885-1 - 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. 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.
Ubuntu Security Notice 6885-1 - 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. 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.
Ubuntu Security Notice 6885-1 - 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. 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.