Nextcloud Talk bruteforce defense bypass (15.0.7,16.0.5,17.1.0)
CVE-2023-45149 Published on October 16, 2023
Password of talk conversations can be bruteforced in Nextcloud
Nextcloud talk is a chat module for the Nextcloud server platform. In affected versions brute force protection of public talk conversation passwords can be bypassed, as there was an endpoint validating the conversation password without registering bruteforce attempts. It is recommended that the Nextcloud Talk app is upgraded to 15.0.8, 16.0.6 or 17.1.1. There are no known workarounds for this vulnerability.
Vulnerability Analysis
CVE-2023-45149 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. Public availability of a proof of concept (POC) exploit exists for CVE-2023-45149. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.
Weakness Type
Improper Restriction of Excessive Authentication Attempts
The software does not implement sufficient measures to prevent multiple failed authentication attempts within in a short time frame, making it more susceptible to brute force attacks.
Products Associated with CVE-2023-45149
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Affected Versions
nextcloud security-advisories:- Version >= 15.0.0, < 15.0.8 is affected.
- Version >= 16.0.0, < 16.0.6 is affected.
- Version >= 17.0.0, < 17.1.1 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.