{"id":"UBUNTU-CVE-2019-20044","details":"In Zsh before 5.8, attackers able to execute commands can regain privileges dropped by the --no-PRIVILEGED option. Zsh fails to overwrite the saved uid, so the original privileges can be restored by executing MODULE_PATH=/dir/with/module zmodload with a module that calls setuid().","modified":"2026-04-22T13:42:29.148748Z","published":"2020-02-24T14:15:00Z","related":["USN-5325-1"],"upstream":["CVE-2019-20044"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-20044"},{"type":"REPORT","url":"https://www.zsh.org/mla/zsh-announce/141"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5325-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-20044"}],"affected":[{"package":{"name":"zsh","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/zsh@5.1.1-1ubuntu2.3+esm1?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.1.1-1ubuntu2.3+esm1"}]}],"versions":["5.1.1-1ubuntu1","5.1.1-1ubuntu2","5.1.1-1ubuntu2.1","5.1.1-1ubuntu2.2","5.1.1-1ubuntu2.3"],"ecosystem_specific":{"binaries":[{"binary_version":"5.1.1-1ubuntu2.3+esm1","binary_name":"zsh"},{"binary_version":"5.1.1-1ubuntu2.3+esm1","binary_name":"zsh-common"},{"binary_version":"5.1.1-1ubuntu2.3+esm1","binary_name":"zsh-static"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-20044.json"}},{"package":{"name":"zsh","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/zsh@5.4.2-3ubuntu3.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.2-3ubuntu3.2"}]}],"versions":["5.2-5ubuntu1","5.4.2-3ubuntu1","5.4.2-3ubuntu2","5.4.2-3ubuntu3","5.4.2-3ubuntu3.1"],"ecosystem_specific":{"binaries":[{"binary_version":"5.4.2-3ubuntu3.2","binary_name":"zsh"},{"binary_version":"5.4.2-3ubuntu3.2","binary_name":"zsh-common"},{"binary_version":"5.4.2-3ubuntu3.2","binary_name":"zsh-static"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-20044.json"}},{"package":{"name":"zsh","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/zsh@5.8.1-1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.8-6build1","5.8-10","5.8.1-1"],"ecosystem_specific":{"binaries":[{"binary_version":"5.8.1-1","binary_name":"zsh"},{"binary_version":"5.8.1-1","binary_name":"zsh-common"},{"binary_version":"5.8.1-1","binary_name":"zsh-static"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-20044.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"low"}]}