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Vulnerability · Published Apr 12, 2024 · Assigned by GitHub_M

CVE-2024-32000Truncated content of messages can be leaked from matrix-appservice-irc

Medium 4.3

In plain English

A medium-severity security flaw in matrix-appservice-irc from matrix-org. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.5%top 60.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
npmmatrix-appservice-irc2.0.0GHSA-wm4w-7h2q-3pf7

Affected products (as reported)

VendorProductVersions
matrix-org matrix-appservice-irc < 2.0.0

Weakness: CWE-280, CWE-755 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References