CVE-2022-39202 IRC mode parameter confusion in matrix-appservice-irc
Incorrect parsing of IRC mode commands allows attackers to trick operators into granting unauthorized permissions to specific users.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2022-39202?
CVE-2022-39202 is a medium-severity vulnerability in matrix-org matrix-appservice-irc, published on 13 Sep 2022. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
matrix-appservice-irc is an open source Node.js IRC bridge for Matrix. The Internet Relay Chat (IRC) protocol allows you to specify multiple modes in a single mode command. Due to a bug in the underlying matrix-org/node-irc library, affected versions of matrix-appservice-irc perform parsing of such modes incorrectly, potentially resulting in the wrong user being given permissions. Mode commands can only be executed by privileged users, so this can only be abused if an operator is tricked into running the command on behalf of an attacker. The vulnerability has been patched in matrix-appservice-irc 0.35.0. As a workaround users should refrain from entering mode commands suggested by untrusted users. Avoid using multiple modes in a single command.
Weakness: CWE-269
Which versions are affected by CVE-2022-39202?
2 open source packages ship an affected version, including matrix-appservice-irc. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
matrix-appservice-irc npm | All versions | 0.35.0 |
matrix-appservice-irc npm | All versions | 0.35.0 |
Products include Matrix Matrix Irc Bridge.
How do I fix CVE-2022-39202?
Upgrade matrix-appservice-irc to 0.35.0 or later.
Is CVE-2022-39202 being exploited?
There is no known exploitation of CVE-2022-39202 in the wild and no public exploit code.
Other vulnerabilities in matrix-org matrix-appservice-irc
- CVE-2022-39203 Parsing issue in matrix-org/node-irc leading to room takeovers
- CVE-2022-29166 Improper handling of multiline messages in matrix-appservice-irc
- CVE-2023-38690 matrix-appservice-irc IRC command injection via admin commands containing newlines
- CVE-2022-3971 matrix-appservice-irc PgDataStore.ts sql injection
- CVE-2023-38700 matrix-appservice-irc events can be crafted to leak parts of targeted messages from other bridged rooms
Sources
Also known as GHSA-cq7q-5c67-w39w.