Description
qmail-verify as used in netqmail 1.06 is prone to an information disclosure vulnerability. A local attacker can test for the existence of files and directories anywhere in the filesystem because qmail-verify runs as root and tests for the existence of files in the attacker's home directory, without dropping its privileges first.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Debian | netqmail | 1.06 | — |
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 10 | netqmail | 1.06-6.2~deb10u1 | DSA-4692-1 |
| Debian 9 | netqmail | 1.06-6.2~deb9u1 | DSA-4692-1 |
| Debian 8 | netqmail | 1.06-6.2~deb8u1 | DLA-2234-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | netqmail | 1.06-6.2~deb10u1build0.20.04.1 | USN-4556-1 |
| Ubuntu 18.04 LTS | netqmail | 1.06-6.2~deb10u1build0.18.04.1 | USN-4621-1 |
| Ubuntu 16.04 LTS | netqmail | 1.06-6.2~deb10u1build0.16.04.1 | USN-4621-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | netqmail | 1.06-6.2~deb10u1build0.14.04.1+esm1 | — |
Advisories 4
- DSA-4692-1 netqmail - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2234-1 netqmail - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-4621-1 netqmail vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-4556-1 netqmail vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026