GHSA-c7hh-3v6c-fj4q: matrix-appservice-irc events can be crafted to leak parts of targeted messages from other bridged rooms

Skip to content

• • Actions

    Automate any workflow

  • Packages

    Host and manage packages

  • Security

    Find and fix vulnerabilities

  • Codespaces

    Instant dev environments

  • Copilot

    Write better code with AI

  • Code review

    Manage code changes

  • Issues

    Plan and track work

  • Discussions

    Collaborate outside of code

• • GitHub Sponsors

    Fund open source developers

*   The ReadME Project
    
    GitHub community articles

• Pricing

1. GitHub Advisory Database
2. GitHub Reviewed
3. CVE-2023-38700

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

Package

npm matrix-appservice-irc (npm)

Affected versions

<= 1.0.0

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 [email protected].

References

• GHSA-c7hh-3v6c-fj4q
• matrix-org/matrix-appservice-irc@8bbd2b6

Published to the GitHub Advisory Database

Aug 4, 2023