Vulnerability Description
When adding an external mail account, processing of IMAP "capabilities" responses are not limited to plausible sizes. Attacker with access to a rogue IMAP service could trigger requests that lead to excessive resource usage and eventually service unavailability. We now limit accepted IMAP server response to reasonable length/size. No publicly available exploits are known.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Open-Xchange | Open-Xchange Appsuite Backend | < 7.10.6 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/173083/OX-App-Suite-SSRF-Resource-ConsumptiThird Party AdvisoryVDB Entry
- http://seclists.org/fulldisclosure/2023/Jun/8Mailing ListThird Party Advisory
- https://documentation.open-xchange.com/appsuite/security/advisories/csaf/2023/ox
- https://software.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release Notes
- http://packetstormsecurity.com/files/173083/OX-App-Suite-SSRF-Resource-ConsumptiThird Party AdvisoryVDB Entry
- http://seclists.org/fulldisclosure/2023/Jun/8Mailing ListThird Party Advisory
- https://documentation.open-xchange.com/appsuite/security/advisories/csaf/2023/ox
- https://software.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release Notes
FAQ
What is CVE-2023-26433?
CVE-2023-26433 is a vulnerability with a CVSS score of 4.3 (MEDIUM). When adding an external mail account, processing of IMAP "capabilities" responses are not limited to plausible sizes. Attacker with access to a rogue IMAP service could trigger requests that lead to e...
How severe is CVE-2023-26433?
CVE-2023-26433 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-26433?
Check the references section above for vendor advisories and patch information. Affected products include: Open-Xchange Open-Xchange Appsuite Backend.