CVE-2019-0211

CVE-2019-0211 is a high-severity (CVSS 7.8) vulnerability in Apache HTTP Server. CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by May 3, 2022. CISA does not currently list it as used in ransomware campaigns. Apache has 41 vulnerabilities in the KEV catalog, 8 of them linked to ransomware.

In Apache HTTP Server 2.4 releases 2.4.17 to 2.4.38, with MPM event, worker or prefork, code executing in less-privileged child processes or threads (including scripts executed by an in-process scripting interpreter) could execute arbitrary code with the privileges of the parent process (usually root) by manipulating the scoreboard. Non-Unix systems are not affected.

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00051.html
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00061.html
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00084.html
• http://packetstormsecurity.com/files/152386/Apache-2.4.38-Root-Privilege-Escalation.html
• http://packetstormsecurity.com/files/152415/Slackware-Security-Advisory-httpd-Updates.html
• http://packetstormsecurity.com/files/152441/CARPE-DIEM-Apache-2.4.x-Local-Privilege-Escalation.html
• http://www.apache.org/dist/httpd/CHANGES_2.4.39
• http://www.openwall.com/lists/oss-security/2019/04/02/3