{"id":"DEBIAN-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":"2026-09-14T17:03:09.449326886Z","published":"2026-06-24T14:17:30.950Z","upstream":["CVE-2026-35025"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-35025"}],"affected":[{"package":{"name":"proftpd-dfsg","ecosystem":"Debian:12","purl":"pkg:deb/debian/proftpd-dfsg?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.8+dfsg-4","1.3.8+dfsg-4+deb12u1","1.3.8+dfsg-4+deb12u2","1.3.8+dfsg-4+deb12u3","1.3.8+dfsg-4+deb12u4","1.3.8+dfsg-4+deb12u5","1.3.8+dfsg-5","1.3.8+dfsg-6","1.3.8+dfsg-7","1.3.8+dfsg-8","1.3.8.a+dfsg-1","1.3.8.b+dfsg-1","1.3.8.b+dfsg-2","1.3.8.b+dfsg-3","1.3.8.b+dfsg-4","1.3.8.c+dfsg-1","1.3.8.c+dfsg-2","1.3.8.c+dfsg-3","1.3.8.c+dfsg-4","1.3.9a~dfsg-1","1.3.9b~dfsg-1","1.3.9c~dfsg-1","1.3.9d~dfsg-1","1.3.9~dfsg-1","1.3.9~dfsg-2","1.3.9~dfsg-3","1.3.9~dfsg-4","1.3.9~dfsg-5"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-35025.json"}},{"package":{"name":"proftpd-dfsg","ecosystem":"Debian:13","purl":"pkg:deb/debian/proftpd-dfsg?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.8.c+dfsg-4","1.3.8.c+dfsg-4+deb13u1","1.3.8.c+dfsg-4+deb13u2","1.3.8.c+dfsg-4+deb13u3","1.3.9a~dfsg-1","1.3.9b~dfsg-1","1.3.9c~dfsg-1","1.3.9d~dfsg-1","1.3.9~dfsg-1","1.3.9~dfsg-2","1.3.9~dfsg-3","1.3.9~dfsg-4","1.3.9~dfsg-5"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-35025.json"}},{"package":{"name":"proftpd-dfsg","ecosystem":"Debian:14","purl":"pkg:deb/debian/proftpd-dfsg?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.8.c+dfsg-4","1.3.9a~dfsg-1","1.3.9b~dfsg-1","1.3.9c~dfsg-1","1.3.9d~dfsg-1","1.3.9~dfsg-1","1.3.9~dfsg-2","1.3.9~dfsg-3","1.3.9~dfsg-4","1.3.9~dfsg-5"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-35025.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}