SB2021072835 - Information disclosure in Prosody
Published: July 28, 2021 Updated: June 8, 2025
Security Bulletin ID
SB2021072835
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Information disclosure (CVE-ID: CVE-2021-37601)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to excessive data output by the application in muc.lib.lua. A remote attacker can gain unauthorized access to sensitive information (list of admins, members, owners, and banned entities of a Multi-User chat room).
Remediation
Install update from vendor's website.
References
- http://www.openwall.com/lists/oss-security/2021/07/28/4
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7BZRRPCNOETB4MN4XSYPRBBKDIHO27DY/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EMKIOEP2CYWHVVUCNWISPE4AGH4IR7O2/
- https://prosody.im/security/advisory_20210722/