Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| ProFTPD Project / ProFTPD | affected 0 through 1.3.9b; affected 0 through 1.3.10rc2 |
CWE
CWE-59
References
- https://github.com/proftpd/proftpd/issues/2170
- http://www.proftpd.org/
- https://www.vulncheck.com/advisories/proftpd-acl-bypass-via-proc-self-root-path-prefix-in-rnfr
ADP enrichment
No English description supplied.
No references supplied.