{"id":"UBUNTU-CVE-2026-35025","details":"ProFTPD through 1.3.9b and 1.3.10rc2 contains an access control bypass vulnerability that allows authenticated FTP users to circumvent Directory ACL restrictions by prefixing paths with /proc/self/root in the RNFR command handler. Attackers can exploit the unresolved symlink components in dir_canonical_path() to cause dir_check() to perform lexical path comparisons that match no configured Directory block, enabling rename operations on files in DenyAll-protected directories and subsequent retrieval of those files. Mitigation: Sessions configured with DefaultRoot (chroot) are not affected, as chroot changes the directory to which /proc/self/root resolves.","modified":"2026-06-25T19:15:28.271467572Z","published":"2026-06-24T14:17:00Z","upstream":["CVE-2026-35025"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-35025"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-35025"},{"type":"REPORT","url":"https://github.com/proftpd/proftpd/issues/2170"}],"affected":[{"package":{"name":"proftpd-dfsg","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/proftpd-dfsg?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.5-2","1.3.5a-1","1.3.5a-1build1","1.3.5a-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"proftpd-basic","binary_version":"1.3.5a-1ubuntu0.1"},{"binary_version":"1.3.5a-1ubuntu0.1","binary_name":"proftpd-mod-geoip"},{"binary_version":"1.3.5a-1ubuntu0.1","binary_name":"proftpd-mod-ldap"},{"binary_name":"proftpd-mod-mysql","binary_version":"1.3.5a-1ubuntu0.1"},{"binary_version":"1.3.5a-1ubuntu0.1","binary_name":"proftpd-mod-odbc"},{"binary_name":"proftpd-mod-pgsql","binary_version":"1.3.5a-1ubuntu0.1"},{"binary_name":"proftpd-mod-sqlite","binary_version":"1.3.5a-1ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-35025.json"}},{"package":{"name":"proftpd-dfsg","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/proftpd-dfsg?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.5d-1","1.3.5e-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.3.5e-1build1","binary_name":"proftpd-basic"},{"binary_name":"proftpd-mod-geoip","binary_version":"1.3.5e-1build1"},{"binary_name":"proftpd-mod-ldap","binary_version":"1.3.5e-1build1"},{"binary_name":"proftpd-mod-mysql","binary_version":"1.3.5e-1build1"},{"binary_version":"1.3.5e-1build1","binary_name":"proftpd-mod-odbc"},{"binary_name":"proftpd-mod-pgsql","binary_version":"1.3.5e-1build1"},{"binary_name":"proftpd-mod-sqlite","binary_version":"1.3.5e-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-35025.json"}},{"package":{"name":"proftpd-dfsg","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/proftpd-dfsg?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.6-6build2","1.3.6c-1","1.3.6c-2","1.3.6c-2ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"proftpd-basic","binary_version":"1.3.6c-2ubuntu0.1"},{"binary_version":"1.3.6c-2ubuntu0.1","binary_name":"proftpd-mod-geoip"},{"binary_name":"proftpd-mod-ldap","binary_version":"1.3.6c-2ubuntu0.1"},{"binary_name":"proftpd-mod-mysql","binary_version":"1.3.6c-2ubuntu0.1"},{"binary_name":"proftpd-mod-odbc","binary_version":"1.3.6c-2ubuntu0.1"},{"binary_name":"proftpd-mod-pgsql","binary_version":"1.3.6c-2ubuntu0.1"},{"binary_version":"1.3.6c-2ubuntu0.1","binary_name":"proftpd-mod-snmp"},{"binary_version":"1.3.6c-2ubuntu0.1","binary_name":"proftpd-mod-sqlite"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-35025.json"}},{"package":{"name":"proftpd-dfsg","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/proftpd-dfsg?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.7b+dfsg-1","1.3.7c+dfsg-1build1","1.3.7c+dfsg-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.3.7c+dfsg-1ubuntu0.1","binary_name":"proftpd-basic"},{"binary_name":"proftpd-core","binary_version":"1.3.7c+dfsg-1ubuntu0.1"},{"binary_version":"1.3.7c+dfsg-1ubuntu0.1","binary_name":"proftpd-mod-crypto"},{"binary_name":"proftpd-mod-geoip","binary_version":"1.3.7c+dfsg-1ubuntu0.1"},{"binary_name":"proftpd-mod-ldap","binary_version":"1.3.7c+dfsg-1ubuntu0.1"},{"binary_name":"proftpd-mod-mysql","binary_version":"1.3.7c+dfsg-1ubuntu0.1"},{"binary_name":"proftpd-mod-odbc","binary_version":"1.3.7c+dfsg-1ubuntu0.1"},{"binary_name":"proftpd-mod-pgsql","binary_version":"1.3.7c+dfsg-1ubuntu0.1"},{"binary_name":"proftpd-mod-snmp","binary_version":"1.3.7c+dfsg-1ubuntu0.1"},{"binary_name":"proftpd-mod-sqlite","binary_version":"1.3.7c+dfsg-1ubuntu0.1"},{"binary_name":"proftpd-mod-wrap","binary_version":"1.3.7c+dfsg-1ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-35025.json"}},{"package":{"name":"proftpd-dfsg","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/proftpd-dfsg?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.8+dfsg-8","1.3.8.a+dfsg-1","1.3.8.b+dfsg-1","1.3.8.b+dfsg-1build1","1.3.8.b+dfsg-1build2","1.3.8.b+dfsg-1build3","1.3.8.b+dfsg-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.3.8.b+dfsg-1ubuntu0.1","binary_name":"proftpd-core"},{"binary_name":"proftpd-mod-crypto","binary_version":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