Nextcloud Server 25.x/26.x LDAP App Logs Plaintext Passwords in Debug Mode (CVE-2023-48305)
CVE-2023-48305 Published on November 21, 2023
Nextcloud Server user_ldap app logs user passwords in the log file on level debug
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Server and Nextcloud Enterprise Server, when the log level was set to debug, the user_ldap app logged user passwords in plaintext into the log file. If the log file was then leaked or shared in any way the users' passwords would be leaked. Nextcloud Server and Nextcloud Enterprise Server versions 25.0.11, 26.0.6, and 27.1.0 contain a patch for this issue. As a workaround, change config setting `loglevel` to `1` or higher (should always be higher than 1 in production environments).
Vulnerability Analysis
CVE-2023-48305 can be exploited with local system access, requires user interaction and user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
Cleartext Storage of Sensitive Information
The application stores sensitive information in cleartext within a resource that might be accessible to another control sphere. Because the information is stored in cleartext, attackers could potentially read it. Even if the information is encoded in a way that is not human-readable, certain techniques could determine which encoding is being used, then decode the information.
Products Associated with CVE-2023-48305
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Affected Versions
nextcloud security-advisories:- Version >= 25.0.0, < 25.0.11 is affected.
- Version >= 26.0.0, < 26.0.6 is affected.
- Version >= 27.0.0, < 27.1.0 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.