CVE-2023-26434
First published: Tue Jun 20 2023(Updated: )
When adding an external mail account, processing of POP3 "capabilities" responses are not limited to plausible sizes. Attacker with access to a rogue POP3 service could trigger requests that lead to excessive resource usage and eventually service unavailability. We now limit accepted POP3 server response to reasonable length/size. No publicly available exploits are known.
Credit: security@open-xchange.com security@open-xchange.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| <7.10.6 | ||
| =7.10.6 | ||
| =7.10.6-revision_39 | ||
| Open-xchange Open-xchange Appsuite Backend | <7.10.6 | |
| Open-xchange Open-xchange Appsuite Backend | =7.10.6 | |
| Open-xchange Open-xchange Appsuite Backend | =7.10.6-revision_39 |
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Reference Links
- https://software.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release_6219_7.10.6_2023-03-20.pdf
- https://documentation.open-xchange.com/appsuite/security/advisories/csaf/2023/oxas-adv-2023-0002.json
- http://seclists.org/fulldisclosure/2023/Jun/8
- http://packetstormsecurity.com/files/173083/OX-App-Suite-SSRF-Resource-Consumption-Command-Injection.html
- https://documentation.open-xchange.com/security/advisories/csaf/oxas-adv-2023-0002.json
Frequently Asked Questions
What is CVE-2023-26434?
CVE-2023-26434 is a vulnerability that allows an attacker with access to a rogue POP3 service to trigger requests that lead to excessive resource usage and service unavailability.
What is the severity of CVE-2023-26434?
The severity of CVE-2023-26434 is medium with a CVSS score of 4.3.
Which software is affected by CVE-2023-26434?
Open-xchange Open-xchange Appsuite Backend versions up to and including 7.10.6 and 7.10.6-revision_39 are affected by CVE-2023-26434.
How can an attacker exploit CVE-2023-26434?
An attacker with access to a rogue POP3 service can exploit CVE-2023-26434 by triggering requests that cause excessive resource usage and service unavailability.
Is there a fix for CVE-2023-26434?
Yes, updating to a version of Open-xchange Open-xchange Appsuite Backend that is higher than 7.10.6-revision_39 will fix CVE-2023-26434.
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- vendor/open-xchange
- canonical/open-xchange open-xchange appsuite backend
- version/open-xchange open-xchange appsuite backend/7.10.6
- version/open-xchange open-xchange appsuite backend/7.10.6-revision_39