Skip to content

matrix-appservice-irc events can be crafted to leak parts of targeted messages from other bridged rooms

Low severity GitHub Reviewed Published Aug 4, 2023 in matrix-org/matrix-appservice-irc • Updated Nov 12, 2023

Package

npm matrix-appservice-irc (npm)

Affected versions

<= 1.0.0

Patched versions

1.0.1

Description

Impact

It was possible to craft an event such that it would leak part of a targeted message event from another bridged room. This required knowing an event ID to target.

Patches

Please upgrade to 1.0.1.

Workarounds

You can set the matrixHandler.eventCacheSize config value to 0 to workaround this bug. However, this may impact performance.

Credits

Discovered and reported by Val Lorentz.

For more information

If you have any questions or comments about this advisory email us at security@matrix.org.

References

@Half-Shot Half-Shot published to matrix-org/matrix-appservice-irc Aug 4, 2023
Published to the GitHub Advisory Database Aug 4, 2023
Reviewed Aug 4, 2023
Published by the National Vulnerability Database Aug 4, 2023
Last updated Nov 12, 2023

Severity

Low
3.5
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
None
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N

Weaknesses

CVE ID

CVE-2023-38700

GHSA ID

GHSA-c7hh-3v6c-fj4q

Source code

Checking history
See something to contribute? Suggest improvements for this vulnerability.