CVE-2023-26433: Medium severity open-xchange app suite backend vulnerability
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.
Affected Software
Event History
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2023-26433.
What is the severity of CVE-2023-26433?
The severity of CVE-2023-26433 is medium with a score of 4.3.
Which software are affected by CVE-2023-26433?
Open-xchange Open-xchange Appsuite Backend versions up to 7.10.6 and versions between 8.0.0 and 8.11.0 are affected by CVE-2023-26433.
How can an attacker exploit CVE-2023-26433?
An attacker with access to a rogue IMAP service could trigger requests that lead to excessive resource usage and eventually service unavailability.
Are there any references for CVE-2023-26433?
Yes, you can find references for CVE-2023-26433 at the following links: [Packet Storm Security](http://packetstormsecurity.com/files/173083/OX-App-Suite-SSRF-Resource-Consumption-Command-Injection.html), [SecLists](http://seclists.org/fulldisclosure/2023/Jun/8), [Open-Xchange Documentation](https://documentation.open-xchange.com/security/advisories/csaf/oxas-adv-2023-0002.json).