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CVE-2023-26432 Details

Description

When adding an external mail account, processing of SMTP "capabilities" responses are not limited to plausible sizes. Attacker with access to a rogue SMTP service could trigger requests that lead to excessive resource usage and eventually service unavailability. We now limit accepted SMTP server response to reasonable length/size. No publicly available exploits are known.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:4.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CNA: [email protected]CVSS-B:4.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
http://packetstormsecurity.com/files/173083/OX-App-Suite-SSRF-Resource-Consumption-Command-Injection.html	CVE	Third Party AdvisoryVDB Entry
https://documentation.open-xchange.com/appsuite/security/advisories/csaf/2023/oxas-adv-2023-0002.json	CVE
http://seclists.org/fulldisclosure/2023/Jun/8	CVE	Mailing ListThird Party Advisory
https://software.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release_6219_7.10.6_2023-03-20.pdf	CVE	Release Notes
http://packetstormsecurity.com/files/173083/OX-App-Suite-SSRF-Resource-Consumption-Command-Injection.html	[email protected]	Third Party AdvisoryVDB Entry
https://documentation.open-xchange.com/appsuite/security/advisories/csaf/2023/oxas-adv-2023-0002.json	[email protected]
http://seclists.org/fulldisclosure/2023/Jun/8	[email protected]	Mailing ListThird Party Advisory
https://software.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release_6219_7.10.6_2023-03-20.pdf	[email protected]	Release Notes

see all 8 references

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-noinfo	Insufficient Information to Classify Weakness	[email protected]
CWE-400	Uncontrolled Resource Consumption	[email protected]

Affected Products

Product	Versions
open-xchange open-xchange appsuite backend	< 7.10.6 >= 8.0.0, < 8.11.0 7.10.6 7.10.6 revision_39
CPE cpe:2.3:a:open-xchange:open-xchange_appsuite_backend:::::::: cpe:2.3:a:open-xchange:open-xchange_appsuite_backend:7.10.6:::::::* cpe:2.3:a:open-xchange:open-xchange_appsuite_backend:7.10.6:revision_39:::::: Remediation No remediation found in references.

Change History

8 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Jan 12, 2024	CVE Modified	[email protected]
Jul 6, 2023	Initial Analysis	[email protected]
Jun 22, 2023	CVE Modified	[email protected]
Jun 22, 2023	CVE Modified	[email protected]