Description
FDclone 2.00a, and other versions before 2.02a, creates temporary directories with predictable names and uses them if they already exist, which allows local users to read or modify files of other fdclone users by creating the directory ahead of time.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | fdclone | 2.04-1 | — |
| Debian 13 | fdclone | 2.04-1 | — |
| Debian 12 | fdclone | 2.04-1 | — |
| Debian 3.0 | fdclone | 2.00a-1woody3 | DSA-352 |
Advisories 1
- DSA-352 fdclone - insecure temporary directory Debian Security (DSA / DLA) · Mar 9, 2026