OXDC-ADV-2024-0001
Metadata
- Document type: OX Dovecot Pro Security Advisory
- Publisher: Open-Xchange GmbH
- Classification: TLP:GREEN
- Publication Date: 2024-09-02
- Current version: 3
- Version status: Final
- Aggregate severity: Medium
References
Vulnerabilities
CVE-2024-25584: SMTP/Submission server accepts bad <LF>.<LF> end of data symbol (SMTP Smuggling)
- CVE reference: CVE-2024-25584
- Internal reference: DOV-6394
- CWE: CWE-345 (Insufficient Verification of Data Authenticity)
- Discovery date: 2023-12-28
- Researcher credits: Hanno Böck <hanno@hboeck.de>
Description
Dovecot accepts dot LF DOT LF symbol as end of DATA command. RFC requires that it should always be CR LF DOT CR LF. This causes Dovecot to convert single mail with LF DOT LF in middle, into two emails when relaying to SMTP.
Product status
Last affected
| Products | CVSS-Vector | CVSS Base Score |
|---|---|---|
| OX Dovecot Pro core 2.3.21.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | 5.3 |
Threats
Impact
Dovecot will split mail with LF DOT LF into two mails.
Exploit status
No publicly available exploits are known.
Remediation
Vendor fix (2024-05-08)
For products
- OX Dovecot Pro core 3.0.0
Upgrade to latest released version.