CVE-2022-39364 : Exploit Details and Defense Strategies

A vulnerability in Nextcloud Server and Nextcloud Enterprise Server could allow an attacker to gain access to credentials for connecting to a SharePoint service.

Understanding CVE-2022-39364

This CVE highlights an issue in the Nextcloud Server software that could lead to the exposure of sensitive information.

What is CVE-2022-39364?

In Nextcloud Server versions prior to 23.0.9 and 24.0.5, along with Nextcloud Enterprise Server versions prior to 22.2.10.5, an attacker with access to

nextcloud.log

could potentially retrieve credentials for connecting to a SharePoint service.

The Impact of CVE-2022-39364

The vulnerability poses a medium severity risk with a CVSS base score of 4.0. It could result in the unauthorized disclosure of sensitive information.

Technical Details of CVE-2022-39364

This section delves into the specific technical aspects of the vulnerability.

Vulnerability Description

The issue arises from clear-text storage of sensitive information, allowing unauthorized access to credentials necessary for connecting to a SharePoint service.

Affected Systems and Versions

Versions of Nextcloud Server prior to 23.0.9 and 24.0.5, as well as Nextcloud Enterprise Server prior to 22.2.10.5, are affected by this vulnerability.

Exploitation Mechanism

By reading the

nextcloud.log

file, an attacker could gather the required credentials to connect to a SharePoint service.

Mitigation and Prevention

Here are some steps to mitigate and prevent exploitation of CVE-2022-39364.

Immediate Steps to Take

As an immediate workaround, it is advised to set

zend.exception_ignore_args = On

in

php.ini

to help mitigate the risk of credential exposure.

Long-Term Security Practices

Implementing secure coding practices and regularly monitoring logs can help enhance overall system security.

Patching and Updates

Ensure that you update to Nextcloud Server versions 23.0.9 and 24.0.5, or Nextcloud Enterprise Server versions 22.2.10.5, 23.0.9, and 24.0.5 to apply the patch for this vulnerability.