{"id":"UBUNTU-CVE-2020-35452","details":"Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Digest nonce can cause a stack overflow in mod_auth_digest. There is no report of this overflow being exploitable, nor the Apache HTTP Server team could create one, though some particular compiler and/or compilation option might make it possible, with limited consequences anyway due to the size (a single byte) and the value (zero byte) of the overflow","modified":"2026-04-22T12:40:02.597317Z","published":"2021-06-10T07:15:00Z","related":["USN-4994-1","USN-4994-2"],"upstream":["CVE-2020-35452"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-35452"},{"type":"REPORT","url":"https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2020-35452"},{"type":"REPORT","url":"https://lists.apache.org/thread.html/rccb1b8225583a48c6360edc7a93cc97ae8b0215791e455dc607e7602@%3Cannounce.httpd.apache.org%3E"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2021/06/10/5"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4994-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4994-2"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-35452"}],"affected":[{"package":{"name":"apache2","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/apache2@2.4.7-1ubuntu4.22+esm1?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.7-1ubuntu4.22+esm1"}]}],"versions":["2.4.6-2ubuntu2","2.4.6-2ubuntu3","2.4.6-2ubuntu4","2.4.7-1ubuntu1","2.4.7-1ubuntu2","2.4.7-1ubuntu3","2.4.7-1ubuntu4","2.4.7-1ubuntu4.1","2.4.7-1ubuntu4.4","2.4.7-1ubuntu4.5","2.4.7-1ubuntu4.6","2.4.7-1ubuntu4.7","2.4.7-1ubuntu4.8","2.4.7-1ubuntu4.9","2.4.7-1ubuntu4.10","2.4.7-1ubuntu4.11","2.4.7-1ubuntu4.13","2.4.7-1ubuntu4.15","2.4.7-1ubuntu4.16","2.4.7-1ubuntu4.17","2.4.7-1ubuntu4.18","2.4.7-1ubuntu4.19","2.4.7-1ubuntu4.20","2.4.7-1ubuntu4.21","2.4.7-1ubuntu4.22"],"ecosystem_specific":{"availability":"Available 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with Ubuntu Pro (Infra-only): 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required","binaries":[{"binary_name":"apache2","binary_version":"2.4.41-4ubuntu3.3"},{"binary_version":"2.4.41-4ubuntu3.3","binary_name":"apache2-bin"},{"binary_name":"apache2-data","binary_version":"2.4.41-4ubuntu3.3"},{"binary_name":"apache2-suexec-custom","binary_version":"2.4.41-4ubuntu3.3"},{"binary_name":"apache2-suexec-pristine","binary_version":"2.4.41-4ubuntu3.3"},{"binary_name":"apache2-utils","binary_version":"2.4.41-4ubuntu3.3"},{"binary_name":"libapache2-mod-md","binary_version":"2.4.41-4ubuntu3.3"},{"binary_version":"2.4.41-4ubuntu3.3","binary_name":"libapache2-mod-proxy-uwsgi"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35452.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},{"type":"Ubuntu","score":"low"}]}