CVE-2023-26432
First published: Tue Jun 20 2023(Updated: )
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.
Credit: security@open-xchange.com security@open-xchange.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| <7.10.6 | ||
| >=8.0.0<8.11.0 | ||
| =7.10.6 | ||
| =7.10.6-revision_39 | ||
| Open-xchange Open-xchange Appsuite Backend | <7.10.6 | |
| Open-xchange Open-xchange Appsuite Backend | >=8.0.0<8.11.0 | |
| Open-xchange Open-xchange Appsuite Backend | =7.10.6 | |
| Open-xchange Open-xchange Appsuite Backend | =7.10.6-revision_39 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
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-2023-26432?
CVE-2023-26432 is a vulnerability that allows an attacker to trigger requests that lead to excessive resource usage and service unavailability in Open-xchange Appsuite Backend.
How does CVE-2023-26432 affect Open-xchange Appsuite Backend?
CVE-2023-26432 affects Open-xchange Appsuite Backend versions up to 7.10.6 and versions 8.0.0 to 8.11.0.
What is the severity of CVE-2023-26432?
The severity of CVE-2023-26432 is medium, with a severity value of 4.3.
How can an attacker exploit CVE-2023-26432?
An attacker with access to a rogue SMTP service could trigger requests that lead to excessive resource usage and service unavailability.
How can I mitigate the vulnerability CVE-2023-26432?
To mitigate CVE-2023-26432, it is recommended to update Open-xchange Appsuite Backend to a version that includes the necessary fix.
- agent/author
- agent/description
- agent/event
- agent/first-publish-date
- agent/last-modified-date
- agent/references
- agent/severity
- agent/softwarecombine
- agent/tags
- agent/type
- agent/weakness
- collector/mitre-cve
- source/MITRE
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- collector/nvd-index
- vendor/open-xchange
- canonical/open-xchange open-xchange appsuite backend
- version/open-xchange open-xchange appsuite backend/8.0.0
- version/open-xchange open-xchange appsuite backend/7.10.6
- version/open-xchange open-xchange appsuite backend/7.10.6-revision_39