{"id":"USN-5090-1","summary":"apache2 vulnerabilities","details":"James Kettle discovered that the Apache HTTP Server HTTP/2 module\nincorrectly handled certain crafted methods. A remote attacker could\npossibly use this issue to perform request splitting or cache poisoning\nattacks. (CVE-2021-33193)\n\nIt was discovered that the Apache HTTP Server incorrectly handled certain\nmalformed requests. A remote attacker could possibly use this issue to\ncause the server to crash, resulting in a denial of service.\n(CVE-2021-34798)\n\nLi Zhi Xin discovered that the Apache mod_proxy_uwsgi module incorrectly\nhandled certain request uri-paths. A remote attacker could possibly use\nthis issue to cause the server to crash, resulting in a denial of service.\nThis issue only affected Ubuntu 20.04 LTS and Ubuntu 21.04.\n(CVE-2021-36160)\n\nIt was discovered that the Apache HTTP Server incorrectly handled escaping\nquotes. If the server was configured with third-party modules, a remote\nattacker could use this issue to cause the server to crash, resulting in a\ndenial of service, or possibly execute arbitrary code. (CVE-2021-39275)\n\nIt was discovered that the Apache mod_proxy module incorrectly handled\ncertain request uri-paths. A remote attacker could possibly use this issue\nto cause the server to forward requests to arbitrary origin servers.\n(CVE-2021-40438)\n","modified":"2026-02-10T04:42:19Z","published":"2021-09-27T14:06:45Z","related":["UBUNTU-CVE-2021-33193","UBUNTU-CVE-2021-34798","UBUNTU-CVE-2021-36160","UBUNTU-CVE-2021-39275","UBUNTU-CVE-2021-40438"],"upstream":["CVE-2021-33193","CVE-2021-34798","CVE-2021-36160","CVE-2021-39275","CVE-2021-40438","UBUNTU-CVE-2021-33193","UBUNTU-CVE-2021-34798","UBUNTU-CVE-2021-36160","UBUNTU-CVE-2021-39275","UBUNTU-CVE-2021-40438"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5090-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-33193"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-34798"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-36160"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-39275"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-40438"}],"affected":[{"package":{"name":"apache2","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/apache2@2.4.29-1ubuntu4.17?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.29-1ubuntu4.17"}]}],"versions":["2.4.27-2ubuntu3","2.4.29-1ubuntu1","2.4.29-1ubuntu2","2.4.29-1ubuntu3","2.4.29-1ubuntu4","2.4.29-1ubuntu4.1","2.4.29-1ubuntu4.2","2.4.29-1ubuntu4.3","2.4.29-1ubuntu4.4","2.4.29-1ubuntu4.5","2.4.29-1ubuntu4.6","2.4.29-1ubuntu4.7","2.4.29-1ubuntu4.8","2.4.29-1ubuntu4.10","2.4.29-1ubuntu4.11","2.4.29-1ubuntu4.12","2.4.29-1ubuntu4.13","2.4.29-1ubuntu4.14","2.4.29-1ubuntu4.16"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"2.4.29-1ubuntu4.17","binary_name":"apache2"},{"binary_version":"2.4.29-1ubuntu4.17","binary_name":"apache2-bin"},{"binary_version":"2.4.29-1ubuntu4.17","binary_name":"apache2-data"},{"binary_version":"2.4.29-1ubuntu4.17","binary_name":"apache2-dev"},{"binary_version":"2.4.29-1ubuntu4.17","binary_name":"apache2-ssl-dev"},{"binary_version":"2.4.29-1ubuntu4.17","binary_name":"apache2-suexec-custom"},{"binary_version":"2.4.29-1ubuntu4.17","binary_name":"apache2-suexec-pristine"},{"binary_version":"2.4.29-1ubuntu4.17","binary_name":"apache2-utils"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-33193"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-34798"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-39275"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5090-1.json"}},{"package":{"name":"apache2","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/apache2@2.4.41-4ubuntu3.5?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.41-4ubuntu3.5"}]}],"versions":["2.4.41-1ubuntu1","2.4.41-4ubuntu1","2.4.41-4ubuntu2","2.4.41-4ubuntu3","2.4.41-4ubuntu3.1","2.4.41-4ubuntu3.3","2.4.41-4ubuntu3.4"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"2.4.41-4ubuntu3.5","binary_name":"apache2"},{"binary_version":"2.4.41-4ubuntu3.5","binary_name":"apache2-bin"},{"binary_version":"2.4.41-4ubuntu3.5","binary_name":"apache2-data"},{"binary_version":"2.4.41-4ubuntu3.5","binary_name":"apache2-dev"},{"binary_version":"2.4.41-4ubuntu3.5","binary_name":"apache2-ssl-dev"},{"binary_version":"2.4.41-4ubuntu3.5","binary_name":"apache2-suexec-custom"},{"binary_version":"2.4.41-4ubuntu3.5","binary_name":"apache2-suexec-pristine"},{"binary_version":"2.4.41-4ubuntu3.5","binary_name":"apache2-utils"},{"binary_version":"2.4.41-4ubuntu3.5","binary_name":"libapache2-mod-md"},{"binary_version":"2.4.41-4ubuntu3.5","binary_name":"libapache2-mod-proxy-uwsgi"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-33193"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-34798"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-36160"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-39275"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5090-1.json"}}],"schema_version":"1.7.3"}