Description
OfflineIMAP before 8.0.3 trusts the server with their STARTTLS capability prior to authentication, which allows STRIPTLS/man-in-the-middle attacks, taking over the connection and extracting account credentials in cleartext.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OfflineIMAP | OfflineIMAP | < 8.0.3 | 8.0.3 |
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 | offlineimap3 | 8.0.3+dfsg-1 | — |
| Debian 13 | offlineimap3 | No fix yet | — |
| Debian 12 | offlineimap3 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | offlineimap3 | No fix yet | — |
| Ubuntu 26.04 LTS | offlineimap3 | No fix yet | — |
| Ubuntu 25.10 | offlineimap3 | No fix yet | — |
| Ubuntu 24.04 LTS | offlineimap3 | No fix yet | — |
| Ubuntu 22.04 LTS | offlineimap3 | No fix yet | — |