USN-8931-1

이지웅 discovered that Apache HTTP Server exposed WebDAV property information. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2026-58415) Zhen Kong and Charles Vosburgh discovered that Apache HTTP Server did not properly validate FTP server responses. A remote attacker could possibly use this issue to make a forward proxy connect to an arbitrary host. (CVE-2026-63045) Hyojae Lee and Zhen Kong discovered that Apache HTTP Server incorrectly handled certain HTTP requests. A remote attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-63292) Lucian Nitescu and Zhen Kong discovered that Apache HTTP Server did not properly handle certain responses from backend servers. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-63686) Qing Xu discovered that Apache HTTP Server incorrectly interpreted HTTP responses from backend servers. A remote attacker could possibly use this issue to perform HTTP response smuggling attacks. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-63718) Hyojae Lee discovered that Apache HTTP Server did not properly validate Digest authentication requests. A machine-in-the-middle attacker could possibly use this issue to bypass authentication. (CVE-2026-73636) Zhen Kong and Darren Carreras discovered that Apache HTTP Server did not properly manage authentication requests. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-73637) Vlatko Kosturjak discovered that Apache HTTP Server did not properly enforce access restrictions for user directories. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2026-79768) Zhen Kong discovered that Apache HTTP Server did not properly handle certain WebDAV requests. An authenticated user could possibly use this issue to cause a denial of service or corrupt WebDAV property data. (CVE-2026-93546) Update Instructions: Run `sudo pro fix USN-8931-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: apache2 - 2.4.52-1ubuntu4.25 apache2-bin - 2.4.52-1ubuntu4.25 apache2-data - 2.4.52-1ubuntu4.25 apache2-suexec-custom - 2.4.52-1ubuntu4.25 apache2-suexec-pristine - 2.4.52-1ubuntu4.25 apache2-utils - 2.4.52-1ubuntu4.25 libapache2-mod-md - 2.4.52-1ubuntu4.25 libapache2-mod-proxy-uwsgi - 2.4.52-1ubuntu4.25 No subscription required