CVE-2023-26430

Description

Attackers with access to user accounts can inject arbitrary control characters to SIEVE mail-filter rules. This could be abused to access SIEVE extension that are not allowed by App Suite or to inject rules which would break per-user filter processing, requiring manual cleanup of such rules. We have added sanitization to all mail-filter APIs to avoid forwardning control characters to subsystems. No publicly available exploits are known.

Weakness classification

• security@open-xchange.com: CWE-77
• nvd@nist.gov: CWE-77

Primary references

• security@open-xchange.com — Third Party Advisory, VDB Entry
• security@open-xchange.com — Mailing List, Third Party Advisory
• security@open-xchange.com
• security@open-xchange.com — Release Notes
• af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, VDB Entry
• af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108
• af854a3a-2127-422b-91ae-364da2661108 — Release Notes