Malicious Matrix homeserver can leak truncated message content of messages it shouldn't have access to

Description

The fix for GHSA-wm4w-7h2q-3pf7 / CVE-2024-32000 included in matrix-appservice-irc 2.0.0 relied on the Matrix homeserver-provided timestamp to determine whether a user has access to the event they’re replying to when determining whether or not to include a truncated version of the original event in the IRC message.

Recommendation

Update the matrix-appservice-irc package to the latest compatible version. Followings are version details:

• Affected version(s): <= 2.0.0
• Patched version(s): 2.0.1

References

• GHSA-w9mh-5x8j-9754
• CVE-2024-39691
• CWE-280
• CWE-755
• CAPEC-310
• OWASP 2021-A4
• OWASP 2021-A6

Related Issues

• Matrix IRC Bridge truncated content of messages can be leaked - CVE-2024-32000
• matrix-appservice-irc events can be crafted to leak parts of targeted messages from other bridged rooms - CVE-2023-38700
• tiny-secp256k1 vulnerable to private key extraction when signing a malicious JSON-stringifyable message in bundled envir - CVE-2024-49364
• matrix-js-sdk can be tricked into disclosing E2EE room keys to a participating homeserver - CVE-2021-40823

Tags:

npm

matrix-appservice-irc