High
proftpd-dfsg — security advisory
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.
- Products
- proftpd-dfsg
- Affected 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, 1.3.8.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
- Fixed versions
- Not specified
- CVEs
- CVE-2026-35025
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:15 UTC · Revision 2
Source evidence
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.
osv:DEBIAN-CVE-2026-35025
proftpd-dfsg
Fixed versions: Not specified
proftpd-dfsg
Fixed versions: Not specified
proftpd-dfsg
Fixed versions: Not specified
Complete source record
{
"id": "f7ac666921c5e10859c627a162fca62a200e3781f4d7de123bdb4258262165d2",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-35025",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-35025",
"summary": "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.",
"evidence": "osv:DEBIAN-CVE-2026-35025",
"products": [
{
"name": {
"value": "proftpd-dfsg",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.3.8+dfsg-4",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.8+dfsg-4+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.8+dfsg-4+deb12u2",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.8+dfsg-4+deb12u3",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.8+dfsg-4+deb12u4",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.8+dfsg-4+deb12u5",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.8+dfsg-5",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.8+dfsg-6",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.8+dfsg-7",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.8+dfsg-8",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.8.a+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.8.b+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.8.b+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.8.b+dfsg-3",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.8.b+dfsg-4",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.8.c+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.8.c+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.8.c+dfsg-3",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.8.c+dfsg-4",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.9a~dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.9b~dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.9c~dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.9d~dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.9~dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.9~dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.9~dfsg-3",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.9~dfsg-4",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.9~dfsg-5",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "proftpd-dfsg",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.3.8.c+dfsg-4",
"evidence": "/affected/1/versions"
},
{
"value": "1.3.8.c+dfsg-4+deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "1.3.8.c+dfsg-4+deb13u2",
"evidence": "/affected/1/versions"
},
{
"value": "1.3.8.c+dfsg-4+deb13u3",
"evidence": "/affected/1/versions"
},
{
"value": "1.3.9a~dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.3.9b~dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.3.9c~dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.3.9d~dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.3.9~dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.3.9~dfsg-2",
"evidence": "/affected/1/versions"
},
{
"value": "1.3.9~dfsg-3",
"evidence": "/affected/1/versions"
},
{
"value": "1.3.9~dfsg-4",
"evidence": "/affected/1/versions"
},
{
"value": "1.3.9~dfsg-5",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "proftpd-dfsg",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.3.8.c+dfsg-4",
"evidence": "/affected/2/versions"
},
{
"value": "1.3.9a~dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.3.9b~dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.3.9c~dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.3.9d~dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.3.9~dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.3.9~dfsg-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.3.9~dfsg-3",
"evidence": "/affected/2/versions"
},
{
"value": "1.3.9~dfsg-4",
"evidence": "/affected/2/versions"
},
{
"value": "1.3.9~dfsg-5",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2026-35025",
"aliases": [
"DEBIAN-CVE-2026-35025"
],
"metrics": [
{
"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"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "proftpd-dfsg",
"purl": "pkg:deb/debian/proftpd-dfsg?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-35025.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "proftpd-dfsg",
"purl": "pkg:deb/debian/proftpd-dfsg?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-35025.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "proftpd-dfsg",
"purl": "pkg:deb/debian/proftpd-dfsg?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-35025.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
}
],
"modified": "2026-10-26T11:47:26.815404883Z",
"provider": "osv",
"upstream": [
"CVE-2026-35025"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-35025"
]
},
"related_cves": [
{
"value": "CVE-2026-35025",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 450728,
"published_at": "2026-06-24T14:17:30.95+00:00"
}