7.4
High
CVE-2026-27856 Doveadm credentials are verified using direct comparison which is susceptible to timing oracle attack
Description
Doveadm credentials are verified using direct comparison which is susceptible to timing oracle attack. An attacker can use this to determine the configured credentials. Figuring out the credential will lead into full access to the affected component. Limit access to the doveadm http service port, install fixed version. No publicly available exploits are known.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| OX Dovecot Pro 2.3 | earliest → 2.3.0 | No fix stated |
| Red Hat Enterprise Linux Server (v. 7 ELS) | Versions not published | |
| Red Hat Enterprise Linux Server Optional (v. 7 ELS) | Versions not published | |
| Red Hat Enterprise Linux 6 | Versions not published | |
| Red Hat Enterprise Linux 10 | Versions not published | |
| Red Hat Enterprise Linux 8 | Versions not published | |
| Red Hat Enterprise Linux 9 | Versions not published | |
| Red Hat Enterprise Linux 7 Extended Lifecycle Support | Versions not published |
References
- documentation.open-xchange.com documentation.open-xchange.com
Timeline
- Published
- Last modified
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