Description
IMAPFilter through 2.6.12 does not validate the hostname in an SSL certificate.
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 | imapfilter | 1:2.6.13-1 | — |
| Debian 13 | imapfilter | 1:2.6.13-1 | — |
| Debian 12 | imapfilter | 1:2.6.13-1 | — |
| Debian 8 | imapfilter | 1:2.5.2-2+deb8u1 | DLA-1976-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | imapfilter | No fix yet | — |
| Ubuntu 16.04 LTS | imapfilter | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | imapfilter | 1:2.5.2-2+deb8u1build0.14.04.1~esm1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP1 | imapfilter | 2.6.16-bp151.4.3.1 | openSUSE-SU-2020:0765-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.1 | imapfilter | 2.6.16-lp151.3.3.1 | openSUSE-SU-2020:0673-1 |
Advisories 3
- DLA-1976-1 imapfilter - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2020:0765-1 Security update for imapfilter SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0673-1 Security update for imapfilter SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://github.com/lefcha/imapfilter/issues/142
- https://bugs.debian.org/939702
- [debian-lts-announce] 20191030 [SECURITY] [DLA 1976-1] imapfilter security update mailing-list
- FEDORA-2019-a6c5d70bde vendor-advisory
- FEDORA-2019-90925dd5aa vendor-advisory
- openSUSE-SU-2020:0673 vendor-advisory
- openSUSE-SU-2020:0765 vendor-advisory