Description
The make_lockdir_name function in policy.c in pmount 0.9.18 allow local users to overwrite arbitrary files via a symlink attack on a file in /var/lock/.
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 | pmount | 0.9.23-1 | — |
| Debian 13 | pmount | 0.9.23-1 | — |
| Debian 12 | pmount | 0.9.23-1 | — |
| Debian 5.0 | pmount | 0.9.18-2+lenny1 | DSA-2063-1 |
Advisories 1
- DSA-2063-1 pmount - denial of service Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://security.debian.org/pool/updates/main/p/pmount/pmount_0.9.18-2+lenny1.diff.gz
- ADV-2010-1520 vdb-entry
- 40939 vdb-entry
- DSA-2063 vendor-advisory