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CVE-2023-26430: Attackers with access to user accounts can inject arbitrary ..

open-xchange

Aug 2, 2023

Aug 8, 2023

Medium

4.3

/

10

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.

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Severity

Medium

Medium

4.3

/

10

CVSS base metrics

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

LOW

User interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

LOW

Availability

NONE

Exploitability Score

2.8

Impact Score

1.4

Weakness

CWE-77__CWE-77__

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