EUVD-2026-16559CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Lifecycle Timeline
4Tags
Description
When dovecot has been configured to use per-domain passwd files, and they are placed one path component above /etc, or slash has been added to allowed characters, path traversal can happen if the domain component is directory partial. This allows inadvertently reading /etc/passwd (or some other path which ends with passwd). If this file contains passwords, it can be used to authenticate wrongly, or if this is userdb, it can unexpectly make system users appear valid users. Upgrade to fixed version, or use different authentication scheme that does not rely on paths. Alternatively you can also ensure that the per-domain passwd files are in some other location, such as /etc/dovecot/auth/%d. No publicly available exploits are known.
Analysis
Path traversal in OX Dovecot Pro allows unauthenticated remote attackers to read arbitrary files such as /etc/passwd when per-domain passwd files are misconfigured above /etc or when slash characters are added to the domain path component. Successful exploitation can expose system authentication data or make system users appear as valid mail users, leading to unauthorized access. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Review file handling controls.
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Priority Score
Vendor Status
Ubuntu
Priority: Medium| Release | Status | Version |
|---|---|---|
| trusty | needed | - |
| xenial | needed | - |
| bionic | needed | - |
| focal | needed | - |
| jammy | needed | - |
| noble | needed | - |
| questing | not-affected | 2.4.0 |
| upstream | released | 2.4.0 |
Debian
| Release | Status | Fixed Version | Urgency |
|---|---|---|---|
| bullseye | vulnerable | 1:2.3.13+dfsg1-2+deb11u1 | - |
| bullseye (security) | vulnerable | 1:2.3.13+dfsg1-2+deb11u2 | - |
| bookworm, bookworm (security) | vulnerable | 1:2.3.19.1+dfsg1-2.1+deb12u1 | - |
| trixie | vulnerable | 1:2.4.1+dfsg1-6+deb13u3 | - |
| trixie (security) | vulnerable | 1:2.4.1+dfsg1-6+deb13u1 | - |
| forky, sid | vulnerable | 1:2.4.2+dfsg1-4 | - |
| (unstable) | fixed | (unfixed) | - |
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External POC / Exploit Code
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