CVE-2023-26436 Deserialization in OX App Suite
Attackers with local network access to the documentconverterws API can inject serialized Java objects to execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-26436?
CVE-2023-26436 is a high-severity unsafe deserialization vulnerability in OX App Suite, published on 20 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Attackers with access to the "documentconverterws" API were able to inject serialized Java objects, that were not properly checked during deserialization. Access to this API endpoint is restricted to local networks by default. Arbitrary code could be injected that is being executed when processing the request. A check has been introduced to restrict processing of legal and expected classes for this API. We now log a warning in case there are attempts to inject illegal classes. No publicly available exploits are known.
Which versions are affected by CVE-2023-26436?
It affects 1 product.
Products include Open-Xchange Open-Xchange Appsuite Backend.
How do I fix CVE-2023-26436?
No fix has been published for CVE-2023-26436 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2023-26436 being exploited?
There is no known exploitation of CVE-2023-26436 in the wild and no public exploit code.
Other vulnerabilities in OX App Suite
Sources
Also known as GHSA-5xxc-86g5-876q.