CVE-2024-32000 Truncated content of messages can be leaked from matrix-appservice-irc
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2024-32000?
CVE-2024-32000 is a medium-severity vulnerability in matrix-org matrix-appservice-irc, published on 12 Apr 2024.
Official description
matrix-appservice-irc is a Node.js IRC bridge for the Matrix messaging protocol. matrix-appservice-irc before version 2.0.0 can be exploited to leak the truncated body of a message if a malicious user sends a Matrix reply to an event ID they don't have access to. As a precondition to the attack, the malicious user needs to know the event ID of the message they want to leak, as well as to be joined to both the Matrix room and the IRC channel it is bridged to. The message reply containing the leaked message content is visible to IRC channel members when this happens. matrix-appservice-irc 2.0.0 checks whether the user has permission to view an event before constructing a reply. Administrators should upgrade to this version. It's possible to limit the amount of information leaked by setting a reply template that doesn't contain the original message. See these lines `601-604` in the configuration file linked.
Which versions are affected by CVE-2024-32000?
2 open source packages ship an affected version, including matrix-appservice-irc.
| Package | Affected | Fixed in |
|---|---|---|
matrix-appservice-irc npm | All versions | 2.0.0 |
matrix-appservice-irc npm | All versions | 2.0.0 |
How do I fix CVE-2024-32000?
Upgrade matrix-appservice-irc to 2.0.0 or later.
Is CVE-2024-32000 being exploited?
There is no known exploitation of CVE-2024-32000 in the wild and no public exploit code.
Sources
Also known as GHSA-wm4w-7h2q-3pf7.