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4.0

Quassel IRC server lets logged-in users view others' chat history

CVE-2013-6404 · published 12 years ago
Summary

The Quassel IRC server (core daemon) before version 0.9.2 does not correctly check who is requesting a chat backlog, so any user who can log in can potentially read another user's past messages. This exposes private conversations and could be misused for information gathering. Upgrade to version 0.9.2 or later, or apply any official patches, to ensure proper access checks.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
quassel-irc quassel_irc <= 0.9.1
0.9.0
cpe:2.3:a:quassel-irc:quassel_irc:*:*:*:*:*:*:*:*
Original advisory text
Quassel core (server daemon) in Quassel IRC before 0.9.2 does not properly verify the user ID when accessing user backlogs, which allows remote authenticated users to read other users' backlogs via...
Quassel core (server daemon) in Quassel IRC before 0.9.2 does not properly verify the user ID when accessing user backlogs, which allows remote authenticated users to read other users' backlogs via the bufferid in (1) 16/select_buffer_by_id.sql, (2) 16/select_buffer_by_id.sql, and (3) 16/select_buffer_by_id.sql in core/SQL/PostgreSQL/.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
4.0 Medium
Exploitation
2% chance of attack within 30 days
Type
CWE-264Permissions, Privileges, and Access Controls
Timeline
Published9 Dec 2013
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2013-6404 · NVD
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