Description
The Sendmail 8.12.3 package in Debian GNU/Linux 3.0 does not securely create temporary files, which could allow local users to gain additional privileges via (1) expn, (2) checksendmail, or (3) doublebounce.pl.
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 | sendmail | 8.12.9-2 | — |
| Debian 13 | sendmail | 8.12.9-2 | — |
| Debian 12 | sendmail | 8.12.9-2 | — |
| Debian 3.0 | sendmail | 8.12.3-6.4 | DSA-305 |
Advisories 1
- DSA-305 sendmail - insecure temporary files Debian Security (DSA / DLA) · Mar 9, 2026