Medium severity · published Aug 2, 2023
CVE-2023-26430
Attackers with access to user accounts can inject arbitrary control characters to SIEVE mail-filter rules
4.3
CVSS
0.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OA
OX App Suite · OX Software GmbH
through 7.10.6-rev42; through 8.10 · source: vendor
OA
Open-xchange Appsuite Backend · Open-xchange
7.10.6; 8.10.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-26430
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-26430
Third Party Advisory
http://packetstormsecurity.com/files/173943/OX-App-Suite-SSRF-SQL-Injection-Cross-Site-Scripting.html
Mailing List
http://seclists.org/fulldisclosure/2023/Aug/8
documentation.open-xchange.com
https://documentation.open-xchange.com/appsuite/security/advisories/csaf/2023/oxas-adv-2023-0003.json
Release Notes
https://software.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release_6230_7.10.6_2023-05-02.pdf
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